GOST 14080-78

• gost-14080-78.pdf (761.10 KiB)
  ГОСТ 14080-78

GOST 14080−78 Tape of precision alloys with specified temperature coefficient of linear expansion. Technical specifications (with Changes 1−6 N)

GOST 14080−78
Group B34

INTERSTATE STANDARD

TAPE OF PRECISION ALLOYS WITH SPECIFIED
TEMPERATURE COEFFICIENT OF LINEAR EXPANSION

Specifications

Precision alloy strip with specified temperature
coefficient of linear expansion. Specifications

OKP 12 6700

Date of introduction 1979−01−01

INFORMATION DATA

1. DEVELOPED AND INTRODUCED by the Ministry of ferrous metallurgy of the USSR

2. APPROVED AND promulgated by the Decree of the State Committee of standards of Ministerial Council of the USSR from 09.03.78 N 639

3. REPLACE GOST 14080−68

4. REFERENCE NORMATIVE AND TECHNICAL DOCUMENTS

The designation of the reference document referenced	The number of the paragraph, subparagraph, enumeration, applications
GOST 8.326−89	Annex 4
GOST 166−89	5.9
GOST 2768−84	Annex 5, 2.1
GOST 2789−73	5.13
GOST 2991−85	6.3
GOST 3282−74	6.3, 6.5
GOST 3560−73	6.3, 6.5
GOST 4381−87	5.9
GOST 5639−82	5.4
GOST 6009−74	6.4, 6.5
GOST 6247−79	6.3
GOST 6507−90	5.9
GOST 6616−94	Annex 5, 2.1
GOST 7470−92	5.12
GOST 7565−81	4.3
GOST 7566−94	4.1, 6.1
GOST 8828−89	6.3, 6.5
GOST 9038−90	Annex 4, 2.1
GOST 9078−84	6.5
GOST 9245−79	Annex 4, 2.1
GOST 9293−74	Annex 5, 2.1
GOST 9450−76	5.11
GOST 9570−84	6.5
GOST 9696−82	Annex 4, 2.1
GOST 10160−75	5.7
GOST 11701−84	5.5
GOST 10354−82	6.4, 6.5
GOST 10394−84	6.3, 6.4, 6.5
GOST 10510−80	5.6
GOST 10994−74	3.3
GOST 12344−88	5.1
GOST 12345−2001	5.1
GOST 12346−78	5.1
GOST 12347−77	5.1
GOST 12348−78	5.1
GOST 12349−83	5.1
GOST 12350−78	5.1
GOST 12351−81*	5.1
______________ * On the territory of the Russian Federation GOST 12351−2003, here and hereafter. — Note the manufacturer’s database.
GOST 12352−81	5.1
GOST 12353−78	5.1
GOST 12354−81	5.1
GOST 12355−78	5.1
GOST 12356−81	5.1
GOST 12357−84	5.1
GOST 12358−2002	5.1
GOST 12359−99	5.1
GOST 12360−82	5.1
GOST 12363−79	5.1
GOST 12364−84	5.1
GOST 12365−84	5.1
GOST 14192−96	6.10
GOST 14253−83	6.5
GOST 15150−69	6.9
GOST 15102−75	6.3
GOST 16272−79	6.5
GOST 17745−90	5.1
GOST 17299−78	Annex 5, 2.1
GOST 18300−87	Annex 5
GOST 20799−88	6.6
GOST 21650−76	6.11
GOST 24597−81	6.11
GOST 26155−84	6.3
GOST 26877−91	5.10
GOST 28473−90	5.1
GOST 28498−90	Annex 5
OST 14−15−193−86	6.4, 6.5

5. The expiration time limit is removed by the Resolution of Gosstandart of Russia N 483 from 14.05.92

6. EDITION Changes N 1, 2, 3, 4, 5, 6, approved in December 1978, July 1982, December 1984, February 1987, June 1988 and may 1992 (IUS 1−79, 9−82, 4−85, 5−87, 11−88, 8−92)


This standard applies to cold rolled strip of precision alloys with specified temperature coefficient of linear expansion (CTE).

(Changed edition, Rev. N 5).

1. CLASSIFICATION

1.1. The tape is divided:

a) as material to:

nagaremono,

soft (annealed) — M;

b) on the accuracy of rolling on:

normal — NT,

higher — T,

high — B;

in) according to the edges of the belt thickness less than 2.0 mm:

edged —

edging;

g) for groups of CTE standards for grades 29NK, 29NK-VI:

with normal limits

with narrowed limits — 1;

d) on frost resistance of alloy 29NK and 29NK-VI:

to minus 70 °C,

to a temperature of minus 196 °C — U.

2. ASSORTMENT

2.1. Cold rolled strip of alloy 29NK brands, 29NK-VI, 52N, 52N-VI, 47ND, 47ND-VI is manufactured with a thickness of 0.02−2.5 mm; grades 36N, 32NKD, 42N, 42NA-VI, 30NKD, 30NKD-VI, 38NKD, 38NKD-VI, 33NK, 33NK-VI, 47NKHR, 47NKH, 48NKH, 47НЗХ — of a thickness of 0.1−2.5 mm.

2.2. Tape dimensions and tolerances for thickness shall be as specified in table.1.

Table 1

Tape thickness, mm	Limit deviation on thickness of tape (mm), with precision rolling			Tape width, mm	Length, m, not less than
normal	high	high
0,02; 0,03	-0,003	-	-	10−100	5,0
0,05	-0,010	-0,008	-	10−200
0,06; 0,08	-0,015	-0,010	-	10−200
0,10; 0,11; 0,12; 0,15	-0,020	-0,015	-0,010	10−565
0,20; 0,25	-0,030	-0,020	-0,015
0,30; 0,35; 0,40	-0,040	-0,030	-0,020
0,45; 0,50; 0,55; 0,60; 0,70	-0,050	-0,040	-0,025
0,80; 0,90	-0,070	-0,050	-0,030	1,0
1,00; 1,10; 1,20; 1,30	-0,090	-0,060	-0,040
1,40; 1,50; 1,60; 1,70	-0,110	-0,080	-0,050	70−565	0,5
1,80; 1,90; 2,00; 2,10; 2,20; 2,30	-0,130	-0,100	-0,060
2,40; 2,50	-0,160	-0,120	-0,080

Note. Tape thickness is 0.11 mm not recommended for new designs.

2.3. At the request of the consumer tape is manufactured, the intermediate thick extreme deviations on the nearest higher thickness.

2.4. The tape is manufactured in widths 10−69 mm with graduation 1mm; width 70−240 mm with gradation of 5 mm; width 240−565 mm with gradation of 10 mm.

2.5. The tape is manufactured in rolls and cuts in the weld rolls. The weld on the tape with a thickness of 0.3 mm and more celebrate with one side of the tape. The coil is allowed to remove defective welds. The mass of the welds is subtracted from the total mass of the metal.

2.6. The tape is manufactured with sheared and mill edge. Tape thickness more than 2.0 mm are made with mill edge.

2.7. Tolerances for the width of the edging tape should not exceed plus 10 mm edging strip must conform to the standards table.2.

Table 2

mm

The thickness of the strip	The ultimate deviation in the width of the tape with a width of
up to 100 incl.	over 100
no more
From 0.02 to 0.050 incl.	-0,3	-0,5
«0,55» 1,0 «	-0,4	-0,6
SV. 1,0 «2,0 «	-0,6	-0,8

The condition of the material, the precision rolling of the edge, a group of CTE standards, the level of frost resistance of alloys of 29NK, 29NK-VI must be specified in the order.

Examples of symbols

Ribbon of alloy grade 38NKD, soft, normal accuracy of rolling, edging, thickness 0.5 mm, width 80 mm:

The same alloy of the brand 29NK-VI, with normal outside of the CTE, Nagarjuna, high precision rolling, timber, thickness 0.15 mm, width 250 mm

The same, with narrowed limits of the CTE, soft, high precision rolling, edging, thickness 0.4 mm, width 250 mm

The same alloy of the brand 29NK, tapered outside of the CTE, with frost up to minus 196 °C, soft, normal accuracy of rolling, edging, thickness of 1.0 mm, a width of 50 mm:

(Changed edition, Rev. N 5).

3. TECHNICAL REQUIREMENTS

3.1. Tape of precision alloys with specified temperature coefficient of linear expansion shall be manufactured in accordance with the requirements of this standard for technological regulations approved in the prescribed manner.

(Changed edition, Rev. N 3).

3.2. The tape is manufactured from alloys of 36N, 32NKD, 42N, 42NA-VI, 29NK, 29NK-VI, 30NKD, 30NKD-VI, 38NKD, 38NKD-VI, 33NK, 33NK-VI, 47NKHR, 47NKH, 48NKH, 47НЗХ, 47ND, 47ND-VI, 52N, 52N-VI.

3.3. The chemical composition of the alloy and the gas content must match trebovaniye 10994.

(Changed edition, Rev. N 3).

3.4. Tape thickness 0,3−2,5 mm are made hard or soft.

Tape with a thickness of less than 0.3 mm are made hard. By agreement between the manufacturer and the consumer, a tape of a thickness of less than 0.3 mm are made soft with updated characteristics on the mechanical properties and surface quality.

3.5. The quality of the surface of the tape shall be those specified in table.3.

Table 3

The status of the tape	Roughness according to GOST 2789		The surface characterization	Permitted defect
Parameter , µm, not more	Base length , mm	Name	The maximum depth of
Nagarebana	1,25	0,8	Smooth, smooth, clear, captive, bubbles, traces of scale	Small slivers, nicks, fingerprints, Rabina	Half of limit deviations for thickness for the normal accuracy of rolling
Soft (annealed)	Not regulated	Not regulated	Shiny or matte, pure, without captivity, bubbles, scale, color from light gray to gray, and moire shades	Small slivers, nicks, fingerprints, Rabina	Half of limit deviations for thickness for the normal accuracy of rolling
Individual risks and scratches no longer than 150 mm	limit deviations for thickness for the normal accuracy of rolling

Notes:

1. On the ribbon from the alloys doped with chromium of a thickness of less than 0.1 mm, a width of less than 130 mm and thickness more than 2.0 mm all widths are allowed, the shades of green.

2. Allowed refinement of surface characteristics of the tape according to the standards agreed in the prescribed manner, indicating the type and number of defects per unit area.

3. Allowed trimming of defects of the tape, the depth of Stripping shall not withdraw the tape beyond the minimum thickness.

3.6. On the edges of the cut tape are not allowed burrs in excess of the maximum deviations in thickness and other defects of sizes more than half of the limit deviations on width of the tape. The amount of Burr for strips with a thickness of 0.05 mm and less is not standardized.

On the edges of the edging strips are not allowed flaw, bringing the tape beyond the minimum width.

(Changed edition, Rev. N 5).

3.7. Temperature coefficient of linear expansion and the temperature of the inflection point, defined on the heat-treated samples shall be as specified in table.4.

Table 4

Grade	Temperature coefficient of linear expansion·10Kin temperature range, °C							Tempe temperatures of the inflection point, °C, not less	The mode of heat treatment of workpieces and samples
20−80	20−100	20−300	20−400	20−450	20−500	20−800
36N	Not more than 1.2 (not more than 1.5)	-	-	-	-	-	-	-	Hardening of workpieces with temperature (840±10) °C, cooling in water, tempering of the samples at temperature (315±10) °C, exposure for 1 h, cooling with the furnace of arbitrary or container
32NKD	-	Not more than 1.0	-	-	-	-	-	-
30NKD, 30NKD-VI	-	-	3,3−4,3	3,8−4,6	-	5,9−6,7	-	390	Annealing of blanks or samples in hydrogen, vacuum or protective atmosphere at a temperature of (960±20) °C, exposure for 1 h, cooling with the furnace or container up to 200 °C, at a speed not exceeding 10 °C/min.
29NK, 29NK-VI	-	-	4,6−5,5	4,6−5,2 (4,5−5,2)	-	5,9−6,4	-	420
29NK-1, 29NK-VI-1	-	-	4,8−5,3	4,7−5,1	-	6,0−6,4	-	420
38NKD, 38NKD-VI	-	-	7,0−7,9	7,0−7,9	-	8,2−8,9 (8,0−8,9)	-	390
33NK, 33NK-VI	-	-	7,4−8,4	7,0−7,6 (7,0−7,8)	-	7,3−7,9 (7,2−8,0)	1,04-of 11.4	470
47NKHR	-	-	8,4−9,0 (8,4−9,2)	9,4−10,0 (9,4−10,2)	-	10,7−11,3 (10,7−11,5)	-	330
47НЗХ	-	-	8,1−8,9	8,3−9,1	-	9,6−10,3 (9,6−10,4)	-	390
47NKH	-	-	7,2−8,1	7,4−8,0 (7,1−8,2)	7,8−8,7	8,6−9,3 (8,5−9,4)	-	400
48NKH	-	-	8,4−9,2	8,4−9,0 (8,4−9,2)	8,6−9,4	9,1−9,7 (9,1−9,9)	-	410
47ND, 47ND-VI	-	-	9,2−10,1	9,3−9,9 (9,2−10,0)	-	9,8−10,4 (9,7−10,5)	-	420
52N, 52N-VI	-	-	9,6−10,4	9,2−10,2 (9,6−10,4)	-	The 9.7 and 10.3 (9,5−10,3)	-	470
42N	-	-	4,5−5,2 (-)	-	-	-	-	-

Notes:

1. The grades 29NK-1 and 29NK-VI-1 produce on demand of the consumer.

2. In parentheses are standards CTE in the temperature range for tapes of ordinary quality, without brackets — for tapes of higher quality.


(Changed edition, Rev. N 3, 5).

3.8. Tape from grades 29 NK, 29NK-VI, 29NK-VI-1, 30NKD, 30NKD-VI should be hardy to minus 70 °C.

At customer’s request, the ribbon of alloy 29NK brands, 29NK-VI, 29NK-1, 29NK-VI-1 are made with cold resistance to minus 196 °C.

3.9. Temporary resistance for hard alloy ribbon brands 29NK, 29NK-VI, 29NK-1, 29NK-VI-1, 47ND, 47ND-VI, 47NKHR, 42N, 36N, 30NKD, 30NKD-VI, 33NK, 33NK-VI, 47NKH, 48NKH should be no more than 930 N/mm(95 kgf/mm). At the request of the consumer tape is manufactured with the temporary resistance not more than 780 N/mm(80 kgf/mm).

(Changed edition, Rev. N 3, 5).

3.10. The tensile strength of soft alloy ribbon brands 29NK, 29NK-VI, 29NK-VI-1, 29NK-1, 47NKHR, 47ND, 47ND-VI should be 490−610 N/mm(50−62 kg/mm), grade alloy 42NA-VI — 440−590 N/mm(45 to 60 kgf/mm).

Elongation of soft strips of alloy grade 47NKHR must be at least 20%, of the alloy 29NK brands, 29NK-VI, 29NK-VI-1, 29NK-1, 47ND, 47ND-VI, 42NA-VI — not less than 23%.

(Changed edition, Rev. N 1, 3, 5).

3.11. At the request of the consumer tape made:

definition of grain size;

testing soft tape with a thickness of 0.1−20 mm of extrusion;

with the definition of CTE on alloys not listed in table.4;

with a normalized camber;

with more stringent requirements on the surface quality;

with the determination of magnetic properties: initial and maximum permeability, induction and coercive force for the alloys of 47ND-VI, 47ND, 52N, 52N-VI;

with a normalized flatness;

with the normalized mechanical properties of hard and soft tape for alloys not listed in PP.3.9 and 3.10;

with a roughness of not more than 0,63 mm;

with the calculated degree of strain-hardening 25, 50, 75%;

with the calculated degree of strain-hardening 25, 50, 75%, and with roughness of not more than 0,63 mm;

with a normalized microhardness.

Note. Norms set by agreement between manufacturer and consumer.


(Changed edition, Rev. N 3, 5).

3.12. Physical and magnetic properties of the alloys, the average values of CTE for different ranges of temperatures (from minus 100 to plus 800 °C) and the recommended modes of heat treatment are given in reference annexes 1−3.

4. ACCEPTANCE RULES

4.1. Acceptance rules tape — GOST 7566.

4.2. Tape apply to the acceptance by the parties consisting of tape of the same brand, one bottoms, one state of material and one thickness.

4.3. To check the quality of alloys selected from melting:

chemical analysis of the sample according to GOST 7565;

for determination of gas content three samples from each tenth of the melt;

to determine the temperature coefficient of linear expansion and temperature of the inflection point — one sample.

By agreement between the consumer and the manufacturer to the batch of products attached a sample to check CTE at the consumer.

(Changed edition, Rev. N 5).

4.4. To check the quality of the tape is taken from the party:

to check the frost resistance, mechanical properties, camber, flatness and tests by squeezing two of a roll or cut;

to determine the magnetic properties and the grain size is one roll or cut.

4.5. Dimensions, limit deviations and surface quality check on 100% of production. Dimensions and limit deviations of strip thickness 0,05 mm and less check on the section length of 10 m from the end of the roll.

4.6. Control of surface roughness the manufacturer shall provide periodically, but no less than once per year.

(Changed edition, Rev. N 5).

4.7. (Deleted, Rev. N 1).

4.8. The chemical composition of the alloy, the temperature of the inflection point and CTE certified company, smelting metal, in the document about quality.

(Changed edition, Rev. N 5).

4.9. The temperature of the inflection point is determined by the requirement of the user.

(Added, Rev. N 3).

4.10. The surface quality and the dimensions of the strip thickness of 2.5 mm the manufacturer checks when rolling.

(Added, Rev. N 5).

5. TEST METHODS

5.1. Chemical analysis of the alloys is carried out according to GOST 12344*-GOST 12360, 12363 GOST-GOST 12365 and GOST 28473 or other methods providing the required accuracy of the analysis.
______________
* On the territory of the Russian Federation GOST 12344−2003. — Note the manufacturer’s database.

The gas content is determined according to GOST 17745, or by other methods providing the required accuracy of the analysis.

5.2. Control CTE and the temperature of the inflection point is performed according to the method given in mandatory Appendix 4. Allowed other methods of determining the temperature of the inflection point, to ensure the necessary accuracy. When a dispute arises, to use the method of Annex 4.

5.3. Frost resistance is determined according to the method given in Annex 5.

5.4. The mechanical properties determined according to GOST 11701 on two short samples of type II, cut along the direction of rolling from different rolls or pieces.

5.5. The grain size is determined according to GOST 5639 on two samples from the roll (cut).

5.2−5.5. (Changed edition, Rev. N 5).

5.6. Test by squeezing is carried out according to GOST 10510 on two samples from different rolls or pieces.

5.7. One melting alloy, passed the tests for frost resistance in large sections when shipped in smaller sections to test for the absence of the phase is allowed to expose.

5.8. The magnetic properties determined according to GOST 10160.

5.9. The thickness of the tape is measured with a micrometer according to GOST 6507 or GOST 4381, or by other measurement means appropriate accuracy. The tape width is measured by caliper according to GOST 166 or micrometer according to GOST 6507. Tape sizes in coils checked at a distance of not less than the length of the coil from end of the roll. The thickness of the strip is measured at a distance of not less than 5 mm from the edge.

(Changed edition, Rev. N 3, 5).

5.10. Camber and warpage is determined according to GOST 26877.

5.11. Microhardness is determined according to GOST 9450.

5.10; 5.11. (Changed edition, Rev. N 5).

5.12. The quality of the surface and the edges checked visually on any portion of the tape.

If there is disagreement in assessing the quality of the surface is inspected at magnification 16. The depth of the surface defects is determined by the depth gauge micrometer according to GOST 7470 or other tool, to ensure the necessary accuracy, or by metallographic methods, or Stripping to complete its removal with the subsequent comparative thickness measurement in the stripped and unstripped areas (strips of thickness greater than 0.4 mm).

(Changed edition, Rev. N 6).

5.13. Surface roughness check the profilers, profiling, optical devices or work samples in accordance with the requirements of GOST 2789.

5.14. It is possible to use statistical methods to control mechanical properties and frost resistance according to technical documentation approved in the established order.

(Changed edition, Rev. N 1).

6. MARKING, PACKAGING, TRANSPORTATION AND STORAGE

6.1. Marking, packaging, transportation and storage — by GOST 7566.

6.2. The tape must be wound into rolls, cuts the ribbon stacked in bundles. Tape with a thickness of 0.05 mm and less shall be wound on a reel or mandrel.

6.3. Coils, bundles, reels and mandrels should be wrapped in one or more layers of waterproof paper GOST 8828, GOST 10396 or other regulatory-technical documentation and laid in serried ranks in boxes of types I or II according to GOST 2991 or other regulatory-technical documentation.

Packaging in barrels, containers or other metal container according to normative-technical documentation, developed in accordance with the requirements of GOST 6247, GOST 26155, GOST 15102.

(Changed edition, Rev. N 6).

6.4. Allowed the transport of coils of tape on the pallets, the rolls shall be wrapped in crepe paper according to GOST 10396 or film according to GOST 10354 or other regulatory-technical documentation and attached to the pallet with soft metal tape according to GOST 3560, GOST 6009 or other normative and technical documentation or wire according to GOST 3282, OST 14−15−193 or other normative and technical documentation in at least three places. Dimensions of the cargo space should not exceed 1200х1200х1200 mm.

6.5. By agreement between manufacturer and consumer a roll of tape with a thickness of 0.5 mm and wrapped in one or more layers of paper according to GOST 8828 or GOST 10396 and film according to GOST 10354, GOST 16272 holstoproshivny or tare the fabric according to GOST of 14,253, non-woven cloth, stitched the flap of waste textile industry or other types of packaging materials according to normative-technical documentation, with the exception of cotton and linen fabrics.

Packed rolls must be tied with wire according to GOST 3282, OST 14−15−193 or other normative and technical documentation or tape according to GOST 3560, GOST 6009 or other normative and technical documentation or some other way to protect the packs from unwinding.

When transporting tapes by rail in small consignments packing must be in boxes of types I or II according to GOST 2991 or other normative and technical documentation developed in accordance with GOST 2991, or on pallets according to normative-technical documentation, developed in accordance with the requirements of GOST 9078, GOST 9570 linking foot in four places over the pan and puff the castle.

The outer diameter of the coil should be no more than 1200 mm, internal — not less than 180 mm.

(Changed edition, Rev. N 6).

6.6. To protect the strip from corrosion is allowed to apply tension industrial oils brands-20A, and-40A according to GOST 20799 inhibitors.

6.7. Weight of cargo must not exceed:

80 kg — with manual loading and unloading;

1250 kg — with mechanized loading and unloading.

6.8. Transportation must be carried out by all kinds of transport in covered vehicles or containers in accordance with cargo carriage regulations applicable to transport of this type, and conditions of loading and fastening of cargoes, approved by the Ministry of Railways of the USSR.

6.9. The tape should be stored in a dry place at temperatures from minus 30 to plus 50 °C and relative humidity not more than 95% in the absence of air, alkaline and other aggressive impurities. Long-term storage (1 month or more) spend on storage conditions 1 liter of GOST 15150.

6.10. Transport marking under GOST 14192.

6.11. When you ship two or more packages to one of the consumer spend consolidation packages in accordance with GOST 21650, GOST 24597.

(Changed edition, Rev. N 6).

ANNEX 1 (reference). Physical and magnetic properties of alloys with specified temperature coefficient of linear expansion

ANNEX 1
Reference

Grade	Specific electric as the company tiulenii,, 10Ohm·m	Module normal Noah abut- guests Of 10N/mm	Heat wire- ness, , 10W/(MK)	Coarse- tive power, And/m	Initial magnetic permeability- emoti, mH/m	Maxi maximum magnetic permeability- emoti, mH/m	Residual induction , 10TL	Induction in field 8 , , 10TL
36N	0,8	15000	0,1250± ±0,0170	The 12.73	0,78	5,52	4700	3700
30NKD	0,50	14000	0,205	70,82	0,72	7,20	10700	13400
32NKD	0,8	15000	0,1250± ±0,0170	The 12.73	0,78	5,52	4700	3700
29NK, 29NK-VI	0,50	14500	0,1670	74,00	0,78	6,36	9750	13250
42N	0,58	Fourteen thousand two hundred	-	-	-	-	-	-
38NKD, 38NKD-VI	0,50	15000	0,1880	33,42	1,44	14,40	10200	12700
33NK, 33NK-VI	0,42	14200	0,1750	76,39	0,96	6,00	9750	12600
47NKHR	0,90	14000	0,1800	For 30.23	1,92	12,30	4400	6800
47НЗХ	0,60	14000	0,1880	-	-	-	-	-
47NKH	0,40	14000	Of 0.2000	At 23.08	2,4	20,88	10500	12900
48NKH	0,40	14000	Of 0.2000	Of 15.91	2,4	20,88	10500	12900
47ND, 47ND-VI	0,45	15000	0,1880	22,28	2,4	Of 22.56	9650	12800
52N, 52N-VI	0,42	16000	-	Of 15.91	-	30,00	13000
58N-VI	0,40	-	0,2090	-	-	-	-	-

Note. The melting point of the alloy is 1450 °C, the density of 8.2 g/cm.


Appendix 1. (Changed edition, Rev. N 5).

ANNEX 2 (informative). The values of CTE of alloys for different ranges of temperatures

ANNEX 2
Reference

Grade	Temperature coefficient of linear expansion ·10To in the range from 20 °C to													The temperature of the inflection point °C, not less
-100	-80	-60	-40	-20	100	200	300	400	500	600	700	800
Alloys with a minimum value of CTE
36N	1,1	-	-	-	-	1,2	2,3	5,7	-	-	-	-	-	-
32NKD	-	-	0,2	-	-	0,7	2,1	5,4	-	-	-	-	-	-
Alloys with low CTE
30NKD; 30NKD-VI	5,6	5,5	5,3	5,1	5,0	4,6	4,4	4,0	4,5	6,5	8,2	9,5	10,7	390
29NK-VI; 29NK	7,6	7,5	7,4	7,4	7,1	6,3	5,9	5,2	5,0	6,4	7,7	9,0	9,8	420
42N	-	-	-	-	-	4,0	4,1	4,1	5,4	7,5	9,2	10,3	11,4	340
Alloys with an average value of CTE
38NKD; 38NKD-VI	8,4	8,4	8,4	8,4	8,5	8,6	8,1	7,9	7,8	8,8	The 10.1	11,5	12,0	390
33NK; 33NK-VI	8,3	8,3	8,2	8,1	7,9	8,3	8,2	7,8	7,6	7,8	9,0	The 10.1	10,9	470
47NKHR	8,8	8,8	8,8	8,7	8,5	8,7	9,1	9,1	The 10.1	11,5	12,5	13,3	14,0	330
47НЗХ	8,8	8,8	8,7	8,7	8,5	8,1	8,2	8,0	8,3	9,6	11,8	12,3	13,1	390
47NKH	-	-	-	-	-	8,6	8,4	8,3	8,1	9,2	10,0	11.1 V	11,9	400
48NKH	-	-	-	-	-	8,6	8,6	8,5	8,5	9,2	10,7	11,2	11,9	410
47ND; 47ND-VI	10,9	10,9	10,8	10,6	10,5	10,2	9,9	9,8	9,9	10,4	11,4	12,2	12,9	420
52N; 52N-VI	10,7	10,7	10,5	10,5	10,5	10,4	10,5	10,6	10,7	10,5	-	-	-	470
58N-VI	-	-	-	-	-	11,0	-	-	-	-	-	-	-	-

Note. For grades 29NK, 29NK-VI:

7,0·10To,

6,5·10To.


Appendix 2. (Changed edition, Rev. N 3, 5, 6).

APPENDIX 3 (reference). The heat treatment products and products made of alloy with specified CTE

APPENDIX 3
Reference

The mode of heat treatment
Grade	Tempe temperature of heating, °C	Environment heating	The holding time at the heating temperature, h	Cooling mode	The purpose of heat treatment
36N; 32NKD	1st operation 850	The air	0,5−1	Quenching in water*	Minimum CTE
2-I operation 315	The same	1,0	Air	The removal of the quenching stresses
3-I operation 95	«	48	The same	Stabilization of linear dimensions
29NK; 29NK-VI; 33NK; 33NK-VI; 47ND; 47ND-VI; 47NKHR; 47NKH; 48NKH; 47НЗХ; 38NKD; 38NKD-VI; 30NKD; 30NKD-VI; 42N; 42NA-VI;	750−900	Vacuum with residual pressure not higher than 0,133 PA, hydrogen with a dew point not higher than minus 40 °C, dissociated ammonia	Depending on the size and charge weight	To 100 °C at a speed of not more than 10 °C/min.	Obtaining the necessary plastic properties of the alloy before the manufacture of products using stamping and drawing
29NK; 29NK-VI; 33NK; 33NK-VI; 47ND; 47ND-VI; 47NKHR; 47NKH; 48NKH; 47НЗХ; 38NKD; 38NKD-VI; 30NKD; 30NKD-VI; 42N; 42NA-VI	900−1000	Vacuum with residual pressure not higher 0,0133 PA, hydrogen with a dew point not higher -30 °C	10−30 min in a single layer	To 100 °C at a speed of not more than 10 °C/min.	Removal of mechanical stresses, the degassing of the surfaces before soldering
58N	860−1000	The air	Depending on the size of the part and a charge weight of	Removal of mechanical stress

* Tempering is subjected to the product thickness or diameter not exceeding 50 mm.


Appendix 3. (Changed edition, Rev. N 3, 5).

ANNEX 4 (required). METHODS OF DETERMINING THE TEMPERATURE COEFFICIENT OF LINEAR EXPANSION (CTE) AND THE TEMPERATURE OF THE INFLECTION POINT

ANNEX 4
Mandatory

I. METHOD of DETERMINATION of TEMPERATURE COEFFICIENT of LINEAR EXPANSION (CTE)

The method is applied to determine the temperature coefficient of linear expansion precision alloy.

The essence of the method consists in measuring the elongation of the alloy specimen when the temperature in the specified range from 20 to 900 °C.

1. Sampling method

1.1. The samples are made from forged or hot rolled billet, produced from samples taken at the casting alloys, or of molded samples obtained by suction from the melt.

Allowed to take the workpiece from the deformed metal.

1.2. The size of the cross section (diameter or side of square) billets with a minimum CTE should be 12−15 mm and not more than 15 mm for the other alloys.

1.3. Dimensions must be: diameter is 3.5−5.0 mm, length 20−50 mm, depending on the type of dilatometer.

Form and precision manufacturing, the samples shall meet the requirements specified in the instructions for each type of dilatometer.

The samples intended for CTE measurement by the direct method, on the mid-length of the sample, make a hole with a diameter of 1.0−1.5 mm and a depth of not less than the radius of the sample intended for the thermocouple.

1.4. Prior to testing, samples of all the alloys subjected to heat treatment according to the mode specified in this standard.

2. Equipment

2.1. To determine the CTE equipment used: photomechanical dilatometry types «of Sevener» or «Leitz»;

electronic dilatometry types», Linsys», «Netss», «REM», «Cinco Rica» and the like;

thermocouple type PP1 or THA GOST 3044*;
______________
* On the territory of the Russian Federation GOST R 8.585−2001.

potentiometers of the class are not worse than 0,05 GOST 9245;

devices heating: resistance furnace, reverberatory furnace radiation IR Spector;

exemplary dilatometric measures of the 2nd and 4th digits;

plane-parallel end measures GOST 9038 or simulators move with the dial indicators (1МИГ, 1МИГП) with a scale division of 1 µm according to GOST 9696 allowed replacement time indicators devices, showing inductive sensor mod. 214 or 217 of the plant «Caliber» of normative-technical documentation.

The sensitivity of dilatometric shall be provided to measure elongation of specimens with an error of not more than 0.001 mm by visual reference or 0.004 mm/mm in case of automatic registration.

Error dilatometer determined during calibration should not exceed ±0,8·10To. Systematic error is taken into account in the test results. Random error should not exceed ±0,2·10To.

The thermocouple and potentiometer should ensure sensitivity of the temperature measurement of the sample if automatic registration is not worse than 10 °C/mm.

The heating device must provide heating of the sample at a constant rate, not exceeding 200 °C/h and the temperature difference across the length of the sample not more than 2 °C at the specified heating rate.

3. Testing

3.1. Alloys with a CTE less than 3·10Toexperience up to 150 °C in stationary mode with shutter speed at a given temperature for at least 20 min.

3.2. Alloys with a CTE in 3·10To theand above experience in dynamic mode with a heating rate 200 °C/h or stationary mode with the exposure at each temperature for at least 20 min the heating rate is 150 °C/h. the test may be performed with heating rate up to 600 °C/h in the temperature range from 300 to 900 °C, while calibration is used dilatometer is carried out under the same heating rates with the use of at least three exemplary measures.

3.3. CTE in a given temperature range is calculated by the formula

,

where  — correction factor at the specified temperature interval defined by the appraisal of the dilatometer for exemplary measures;

 — increment of length of the sample miltogramma in the corresponding temperature interval, mm;

 — magnification recording miltogramma;

the length of the sample at a temperature of (20) °C, measured with an accuracy of at least 0,01 mm, mm.

 — upper value of temperature range for determining CTE, °C;

the total correction for the CTE of the material of the sample holder, and a private course

.

3.4. Test results for register CTE was adopted by the company, indicating the following:

the type of dilatometer and its serial number;

the correction factor and ;

heating rate, °C/h;

magnification recording ;

the initial length of the specimen , mm;

the increment of the length of the sample at specified intervals, determined by miltogramma (or reading device), mm;

the value of CTE in the respective temperature range, To;

the sensitivity of the measurement of temperature, MV/mm (°/mm).

4. Verification of dilatometers

4.1. The test dilatometer agencies departmental metrological service.

(Changed edition, Rev. N 6)

4.2. The frequency of calibration of dilatometers 1 time per year. In the case of replacement parts the quartz measurement cell is an extraordinary fact.

4.3. Verification of dilatometer produced by certified industry procedures developed in accordance with GOST 8.326*.
______________
* On the territory of the Russian Federation valid PR 50.2.009−94.

4.4. Dilatometry, did not pass the test, for the purposes of acceptance control products is not allowed.

Sec. 2−4. (Changed edition, Rev. N 5).

II. THE METHOD OF DETERMINING THE TEMPERATURE OF THE INFLECTION POINT

The method is applied to determine the temperature of the inflection point of precision alloys for the curve of expansion.

1. The essence of the method

The method consists in measuring the elongation of the heated sample of the alloy, the curve of elongation depending on the temperature in the graphical determination of this temperature curve point of inflection within the range of the strongly curved portion of the curve.

2. Samples

Samples for testing must comply with GOST 14080. Before the test, samples of all the alloys subjected to heat treatment according to the mode specified in GOST 14080.

3. Equipment

For testing use dilatometry according to GOST 14080.

4. Testing

Measurement of elongation of the heated sample is carried out in dynamic mode at heating with constant speed, in accordance with the method of determining the temperature coefficient of linear expansion. To register the lengthening of the recording device used (XY (Fig.1) or dual-channel automatic potentiometers (Fig.2), the light beam recording device), providing the record format miltogramma with not less than 130х180 mm. the Upper limit of the heating temperature during the test should not exceed 80−100 °C reference temperature point of inflection is given in GOST 14080 or other regulatory-technical documentation.

Damn.1. An example of determining the temperature of inflection point when writing miltogramma on a two-coordinate potentiometer or a photographic plate

An example of determining the temperature of inflection point when writing miltogramma
on a two-coordinate potentiometer or a photographic plate

Damn.1

Damn.2. An example of determining the temperature of inflection point when writing miltogramma on dual-potentiometer

Example determine the temperature of the inflection point in
record miltogramma on dual-potentiometer

Damn.2

5. Processing of test results

5.1. The graphics processing method of test results

5.1.1. Method is used for the treatment miltogramma recorded on two-axis or dual-potentiometers.

5.1.2. The dilatometric temperature of the inflection point of the curve is determined by elongation of not less than three approximations.

5.1.3. When processing miltogramma recorded on a two-coordinate potentiometer (DWG.3), for a given alloy source temperature equal to the reference value of the inflection point according to GOST 14080. Found temperature to be a first approximation to the temperature dilatometric inflection points.

Damn.3. The temperature of inflection point when writing miltogramma on a two-coordinate potentiometer

The temperature of inflection point when writing miltogramma
on a two-coordinate potentiometer

Damn.3

5.1.4. On the x-axis delay value , (a+20) °C, (+80) °C. Value (+20) (+80) °C is projected on the curve elongation. Corresponding on the curve of elongation of the dots, respectively, and . The portion of the curve replaces the straight, which continues in the direction of the axis of absciss

C.

5.1.5. On the x-axis is applied to the values of and , which are then projected on the curve elongation. The obtained curve points connect a straight line, whose intersection with the continuation of the direct gives a second approximation dilatometric inflection points. The projection on the x-axis and marked across the second approximation of the temperature dilatometric inflection points.

5.1.6. On the x-axis is applied to the values of and and then in the same sequence as in section 5.1.5 get the third approximation of the temperature dilatometric inflection points .

5.1.7. In the case of recording miltogramma on dual-potentiometer (on dilatometric type «Linsys», «Cinco-Rico», etc.) (damn.4) determination of dilatometric temperature of the inflection point is performed in the above sequence. The difference is that the recovered normals to the x-axis is carried out to the intersection with a line record temperatures (video ). Then, these intersection points are transferred horizontally to the curve lengthening (), with the obligatory account of the spacing of the feathers.

Damn.2. The temperature of inflection point when writing miltogramma on dual-potentiometer

The temperature of inflection point when writing
miltogramma on dual-potentiometer

Damn.4

5.1.8. The difference in the temperature values of the inflection points, defined by the second and third approximations should not exceed 5 °C. In the case of greater difference, you need to perform the next step of approximation.

5.2. Graphic-analytical method of analysis of test results

5.2.1. Method is used for the treatment miltogramma recorded on the photographic plate.

5.2.2. When processing miltogramma recorded on the photographic plate for a given alloy, find the initial temperature equal to the reference value of the inflection point according to GOST 14080. Temperature will be a first approximation to the temperature dilatometric inflection points.

5.2.3. On the x-axis is applied values (+20) °C and (+80) °C and carry them perpendicular to the curve of elongation. Received transferred dots represent respectively and . On the y-axis for points and find the values and in mm

H.

5.2.4. On the x-axis is applied to values and and carry them perpendicular to the curve of elongation. On the ordinate is obtained for the curve lengthening of the two points to find the value and in millimetres.

5.2.5. Value in °C value , , , in mm are substituted in the formula

,

where value is the second approximation of the temperature dilatometric inflection points.

5.2.6. Values and remain unchanged. On the x-axis is applied to values and and carry them perpendicular to the curve of elongation. To obtain two points on the y-axis to find the value and in millimetres.

5.2.7. Values , , , are substituted in the above formula and find the temperature , which is the third approximation to the temperature dilatometric inflection points.

5.2.8. The difference in the temperature values of the inflection points, defined by the second and third approximations should not exceed 5 °C. In the case of greater difference, you need to perform the next step of approximation.

5.3. The method of processing the results of the tests involved computing means

5.3.1. When processing miltogramma for this alloy find initial temperature equal to the reference value of the inflection point according to GOST 14080.

5.3.2. On the x-axis is applied values (+20) °C and (+80) °C. Between these values is applied to three additional points at approximately equal intervals from each other. All five points stand perpendicular to the curve of elongation. Obtained for the curve lengthening of the five points to find the value of y ….

5.3.3. On the x-axis is applied to the values of and . Between these values is applied to three additional points at approximately equal intervals from each other. All five points stand perpendicular to the curve of elongation. For the obtained five points to find the value of y ….

5.3.4. The method of least squares each of the resulting two groups of five separated points is described by a polynomial of the first degree. To compute the values on the axis are substituted in °C, and the axis are in millimeters. Thus, there are two equations of lines that pass through the given points:

,

.

Substituting the values , , , in the formula obtained in °C temperature dilatometric inflection points.

Sec. 5. (Changed edition, Rev. N 5).

6. Test report

The test report must include:

the designation of this standard;

grade;

the type of dilatometer and its serial number;

the results of the tests;

name of the laboratory that conducted the test.

II. (Added, Rev. N 4).

APPENDIX 5 (mandatory). METHOD OF DETERMINING FROST-RESISTANCE

ANNEX 5
Mandatory

The essence of the method consists in establishing the stability of the structure of a -solid solution alloys, when cooled to minus 70 or minus 196 °C.

1. Sampling and fabrication of micro-sections

1.1. Samples taken from the finished product.

1.2. Control of frost resistance carried out on the micro-sections over the entire cross section of the finished product.

For bars with a diameter or a side of a square more than 30 mm is permitted to control half the cross sectional area.

For hot rolled sheets of a width of more than 100 to 200 mm and cold-rolled strips with a width of 400 mm and more control is carried out on the area equal to half of the cross section; a width of more than 200 mm to 600 mm — specimens length 100 mm, cut from the middle of the width of the sheet across the direction of rolling.

For wire diameter less than 2 mm control is recommended for 3−5 cross sections.

For producing thin sections of a sample can be cut into several parts.

Allowed to carry out the control of frost resistance in longitudinal samples controlled area in this case should match the size specified above.

1.3. Made sections is subjected to heat treatment by mode, given in tab.4 present standard, vacuum with a residual pressure of not more of 0.133 PA or in hydrogen with a dew point not higher than 40 °C and, if necessary, podpalivajut. For thin sections allowed a heat treatment to produce before the production of thin sections.

2. Equipment

2.1. To determine the frost used the following equipment and reagents:

the optical microscope, providing an increase in the 100−400;

the Dewar vessel;

acetone GOST 2768 or ethyl alcohol according to GOST 18300 or GOST 17299;

carbon dioxide, solid (dry ice) according to GOST 12162 or liquid nitrogen according to GOST 9293;

thermocouple copper-Constantan GOST 6616 or thermometer according to GOST 28498;

the potentiometer according to GOST 9245.

3. Testing

3.1. To obtain a temperature of minus 70 °C in a Dewar vessel are cooling mixture of acetone or alcohol with dry ice or liquid nitrogen. Allowed other cooling methods.

For cooling to minus 196 °C using liquid nitrogen.

3.2. Samples are placed in cool environment and allowed to stand for 2 h. it is Recommended to apply pre-cooling of the samples.

3.3. Samples are removed and warmed up to room temperature.

3.4. Sections carefully view at a magnification of 100−400.

Stability -solid solution is characterized by the absence of the needle sections of the structure -phase (martensite).