GOST 1789-2013

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  ГОСТ 1789-2013

GOST 1789−2013 Strips and strips of beryllium bronze. Specifications

GOST 1789−2013

INTERSTATE STANDARD

STRIPS AND STRIPS OF BERYLLIUM BRONZE

Specifications

Beryllium bronze strips and tapes

Specifications

ISS 77.150.30

Date of introduction 2015−01−01

Preface

Goals, basic principles and main procedure of works on interstate standardization have been established in GOST 1.0−92 «interstate standardization system. Basic provisions» and GOST 1.2−2009 «interstate standardization system. Interstate standards, rules and recommendations on interstate standardization. The procedure of development, adoption, application, renewal and cancellation"

Data on standard

1 DEVELOPED by the Technical Committee for standardization TC 106 «Tsvetmetprokat», Scientific-research, project and design Institute for alloys and processing of nonferrous metals open joint stock company «Institute tsvetmetobrabotka» (JSC «Institute tsvetmetobrabotka»)

2 SUBMITTED by the Technical Secretariat of the Interstate Council for standardization, Metrology and certification

3 ACCEPTED by the Interstate Council for standardization, Metrology and certification by correspondence (minutes of 14 November 2013 No. 44−2013)

The standard was accepted by voting:

Short name of the country on MK (ISO 3166) 004−97	Country code MK (ISO 3166) 004−97	Abbreviated name of the national authority for standardization
Armenia	AM	Ministry Of Economy Of The Republic Of Armenia
Moldova	MD	Moldova-Standard
Russia	EN	Rosstandart
Kyrgyzstan	KG	Kyrgyzstandard

4 by Order of the Federal Agency for technical regulation and Metrology dated November 22, 2013 N 2005-St inter-state standard GOST 1789−2013 introduced as a national standard of the Russian Federation from 1 January 2015.

5 REPLACE GOST 1789−70

6 REISSUE. March 2016


Information about the changes to this standard is published in the annually issued reference index «National standards», and the text changes and amendments — in monthly published information index «National standards». In case of revision (replacement) or cancellation of this standard a notification will be published in a monthly information index «National standards». Relevant information, notification and lyrics are also posted in the information system of General use — on the official website of the Federal Agency for technical regulation and Metrology on the Internet

1 Scope

This standard applies to cold rolled strips and strips of beryllium bronze, used in instrument engineering for production of various components, including springs and other sensitive elements.

2 Normative references

This standard uses the regulatory references to the following standards:

GOST 166−89 (ISO 3599−75) Calipers. Specifications

GOST 427−75 Rulers measuring metal. Specifications

GOST 1497−84 (ISO 6892−84) Metals. Test methods tensile

GOST 2228−81 Paper sack. Specifications

GOST 2991−85 wooden disposable Boxes for loads up to 500 kg. General specifications

GOST 2999−75 Metals and alloys. Method of measurement of hardness by Vickers

The Wire GOST 3282−74 General purpose low carbon steel. Specifications

GOST 3560−73 package steel Strip. Specifications

GOST 4381−87 Micrometers lever. General specifications

GOST 6507−90 Micrometers. Specifications

GOST 7164−78 Devices for automatic tracking of the SSE trim. General specifications

GOST 7502−98 metallic measuring tape. Specifications

GOST 8828−89 base Paper and paper double-layer waterproof packaging. Specifications

GOST 9450−76 the microhardness measurements by indentation of the diamond tips

GOST 9557−87 flat wooden Pallet size 800x1200 mm. specifications

GOST 9569−2006 waxed Paper. Specifications

GOST 10510−80 Metals. Test method for the extrusion of sheets and strips for Eriksen

GOST 11701−84 Metals. Methods tensile tests of thin sheets and strips

GOST 14019−80 Materials metal. Method of bend test

GOST 14192−96 Marking of cargo

GOST 15027.1−77 Bronze without tin. Methods for determination of copper

GOST 15027.2−77 Bronze without tin. Methods for determination of aluminium

GOST 15027.3−77 Bronze without tin. Methods of iron determination

GOST 15027.5−77 Bronze without tin. Methods for determination of Nickel

GOST 15027.6−77 Bronze without tin. Methods for determination of silicon

GOST 15027.7−77 Bronze without tin. Methods for determination of lead

GOST 15027.13−77 Bronze without tin. Methods for determination of beryllium

GOST 15027.14−77 Bronze without tin. Methods for determination of titanium

GOST 15102−75 the universal metal closed Container of nominal gross mass 5,0 t Technical specifications

GOST 17065−94 cardboard winding Drums. Specifications

GOST 17308−88 Twines. Specifications.

GOST 18175−78 of Bronze without tin pressure treated. Brand

GOST 18242−72* Statistical acceptance inspection by alternative feature. Plans control
_______________
* On the territory of the Russian Federation GOST R ISO 2859−1-2007.


GOST 18321−73 Statistical quality control. Methods of random selection of piece products

GOST 18579−79 Device lifting medium universal and specialized containers with a gross mass of up to 6.0 t incl. Specifications

GOST 20068.1−79 Bronze without tin. Method of spectral analysis on a metal standard samples with photographic registration of spectra

GOST 20068.2−79 Bronze without tin. Method of spectral analysis on a metal standard samples with photographic registration of spectra

GOST 21073.0−75 ferrous Metals. Determination of grain size. General requirements

GOST 21073.1−75 ferrous Metals. Determination of grain size by comparison with the scale of microstructures

GOST 22225−76 universal Containers with a gross weight 0,625 and 1,25 t. specifications

GOST 24047−80 Semi-finished products from nonferrous metals and their alloys. Sampling for tensile test

GOST 24231−80 non-ferrous metals and alloys. General requirements to selection and preparation of samples for chemical analysis

GOST 24597−81 the packaged goods. Basic parameters and dimensions

GOST 26653−90 Preparation of General cargoes for transportation. General requirements

GOST 26877−2008 metal Products. Methods of measuring form deviations of

ST SEV 543−77 Number. Record rules and rounding

Note — When using this standard appropriate to test the effect of reference standards in the information system of General use — on the official website of the Federal Agency for technical regulation and Metrology on the Internet or in the annual information index «National standards» published as on January 1 of the current year, and the editions of the monthly information index «National standards» for the current year. If the reference standard is replaced (changed), when using this standard should be guided by replacing (amended) standard. If the reference standard is cancelled without replacement, then the situation in which the given link applies to the extent that does not affect this link.

3 Assortment

3.1 the thickness of the tapes and tolerances for thickness shall be as specified in table 1.


Table 1

In millimeters
Nominal thickness of tape	Limit deviation on thickness of strips
Normal accuracy	Increased accuracy	High precision
From 0.02 to 0.10	-	0 -0,01	-
From 0.10 to 0.14 incl.	0 -0,02	0 -0,015
SV. 0.14 to 0.30 incl.	0 -0,03	0 -0,02
SV. 0.30 to 0.45 incl.	0 -0,04	0 -0,03
SV. 0.45 to 0.55 incl.	0 -0,05	0 -0,04	0 -0,03
SV. Of 0.55 to 0.70 incl.	0 -0,06	0 -0,05
SV. 0.70 to 1.00 incl.	0 -0,06	0 -0,05	Zero -0,04
SV. Of 1.00 to 1.20 incl.	0 -0,07	0 -0,05	-
SV. Of 1.20 to 1.30 incl.	0 -0,07	0 -0,06
SV. 1.30 to 1.40 incl.	0 -0,09	0 -0,06
SV.Of 1.40 to 1.50 incl.	0 -0,09	0 -0,08	0 -0,07

3.2 strip Thickness and limit deviation on thickness shall be as specified in table 2.


Table 2

In millimeters
The width of the stripes	Limit deviation on thickness of strips
Normal accuracy	Increased accuracy	High precision
0,15 0,16 0,18 0,20 0,22 0,23	-0,03	-0,02	-
0,25	-0,04
0,28 0,30	-0,04	-0,03
0,32	-0,04
0,40 0,45 0,50	-0,05
0,55 0,60 0,65	-0,06	-
0,70 0,75 0,80 0,85	-0,07
0,90 Of 1.00	-0,08
1,10 1,20	-0,09
1,30 1,40 1,50	-0,10
1,60 1,70	-0,10	-0,09	-0,07
1,80 1,90 Of 2.00	-0,08
2,20 2,50	-0,12	-0,11
2,80 Of 3.00	-0,10
3,20 3,50	-0,13	-0,12
Of 4.00	-0,18	-0,16	-0,14
4,50 5,00	-0,20	-0,19	-0,18
5,50	-0,24	-0,22
6,00	-0,25	-0,24
Note — the Theoretical mass of the bands shown in Annex A.

3.3 line widths and tolerances for the width depending on the thickness should meet the requirements specified in table 3.


Table 3

In millimeters
Width	Maximum deviation in width for strips with thickness of
to 1.5		St 1.5 to 3.0		St. is 3.0 to 5.0	St. 5.0 to 6.0
Normal accuracy	Increased accuracy	Normal accuracy	Increased accuracy
40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100	A 1.0	-0,30	To 2.0	-0,50	-	-
110, 120, 130, 140, 150, 160, 170	To 2.0	-5,0
180, 190, 200, 250, 270, 280, 290, 300	To 2.0	-0,60	Is 3.0	-0,80	Is 3.0	-6,0

3.4 the Length of the strip and limit deviations depending on the condition of the material and thickness shall conform to the requirements specified in table 4.


Table 4

In millimeters
The condition of the material	The thickness of the strip	The length of the strip	Limit deviations for the length of the strip
Soft (tempered)	0,15−6,0	200−500	+5
Solid (deformed after hardening by 30−40%)	0,15−1,50	200−600	+5
1,60−6,0	500−1500	+10

3.5 Strips produce dimensional dimensional and random length.

3.6 the Width of the strips and limit deviations on width depending on the thickness should meet the requirements specified in table 5.


Table 5

In millimeters
Width	Maximum deviations in width when the thickness of the tape
And 1.0 incl.	1,1−1,5	Up to 1.5 incl.
Normal accuracy		Increased accuracy
10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 28, 30, 32, 34, 36, 38, 40, 45, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100	-0,5	-0,8	-0,3
110, 120, 130, 140, 150, 160, 170	-0,4
180, 190, 200, 250, 260, 270, 280, 300	-0,8	A 1.0	-0,6
Note — Tape thickness: up to 0.45 mm inclusive manufactured in widths from 10 to 280 mm, thickness 0,50 mm — width from 20 to 300 mm.

3.7 Tape is manufactured in lengths of 5 m. allowed manufacturing strips less than 5 m but not less than 1 m, not more than 10% of the batch weight.

The legend of ribbons and bands placed according to the scheme:

Use the following abbreviations:
a method of manufacturing	— cold-deformed (drawn) — D
sectional shape	— rectangular — OL;
precision manufacturing
normal accuracy in thickness:	— normal accuracy in width — N;
— increased accuracy in width — K;
increased accuracy on thickness:	— normal accuracy in width;
— increased accuracy in width — P;
high precision in thickness:	— normal accuracy in width;
— increased accuracy in width.
condition	— soft (tempered) — M;
— solid (deformed after hardening by 30−40% — T)
length	— d — MD;
— dimensional — KD
— random — ND;

Instead of the absent indicator is an X (in addition to indicating lengths)

Examples of symbols of pipes:

Strip, cold-drawn, of rectangular cross section, normal accuracy in thickness, high accuracy by width, soft (tempered), thickness 0.30 mm, width 80 mm, multiple lengths from beryllium bronze brand Brb2:

Strip DPRK 0,3080 KD Brb2 GOST 1789−2013
Tape cold-drawn, of rectangular cross section, a high-precision thickness, high accuracy by width, solid (deformed after hardening by 30−40%), thickness 0.55 mm, width 150 mm, random length from beryllium bronze brand Brbnt1,9:

Tape DPVT of 0.55150 ND Brbnt1,9 GOST 1789−2013

4 Technical requirements

4.1 Strips and strips of beryllium bronze manufactured in accordance with the requirements of this standard for technological regulations approved in the prescribed manner.

4.2 Chemical composition of the strip from beryllium bronze Brb2 brands, Brbnt1,9 must meet the requirements of GOST 18175−78.

4.3 and Strip made:

— soft (tempered), M — bronze Brb2 brands and Brbnt1,9;

— solid (deformed after hardening by 30−40%), T — bronze Brb2 brands, Brbnt1,9.

The surface of the strip must be smooth, clean, free from contamination, hinder inspection must not be captured, cracks, shells, bubbles, dents, and corrosion spots.

4.4 Permitted minor defects (slivers, cracks, shells, bubbles, dents, and corrosion spots), not outputs and strips, after Stripping the control over the tolerances for the thickness and color of a tint, redness and local darkening.

Allowed the surface quality of the strip to check on the standards agreed upon between manufacturer and user.

4.5 the edge of the strip should be trimmed evenly and should not have cracks and delamination. Wavy, wrinkled and ragged edge is not allowed.

4.6 Camber strips shall not exceed 4 mm per 1 m length tape — 3 mm per 1 m length.

The camber of the strip with the width of 220 mm and high precision manufacturing shall not exceed respectively 3 mm and 2 mm per 1 m length.

4.7 Mechanical properties of the strip shall conform to the requirements specified in table 6.


Table 6

Grade of bronze	The condition of the material	Thickness of strip, mm	Rupture strength, MPa (kgf/mm)	Elongation ,%, not less	The Vickers hardness HV
Brb2	Soft (after quenching)	Less than 0.15	-	-	130
From 0.15 to 0.25	390−590 (40−60)	20
More than 0.25	30
Brbnt1,9	Less than 0.15	-	-	Not more than 120
From 0.15 to 0.25	390−590 (40−60)	20
More than 0.25	30
Brb2	Solid (deformed after hardening by 30−40%)	Less than 0.15	-	-	At least 170
From 0.15 to 0.25	590−880 (60−90)	-
More than 0.25	640−930 (65−95)	2,5
Brbnt1,9	Less than 0.15	-	-	At least 160
From 0.15 to 0.25	590−880 (60−90)	-
More than 0.25	640−930 (65−95)	2,5
Note — the hardness of the strip thickness from 0.10 to 0.25 mm inclusive check on the device PMT-3 at a load of 0.2 kgf with a thickness of 0,05−0,09 mm under a load of 0.1 kgf, a thickness less than 0.05 mm under load of 0.02 kgf. The hardness must correspond to the values measured with a diamond pyramid (Vickers).

4.8 height at Eriksen (when punch radius 10 mm) for strip thickness 0,10−0,25 shall be as defined in table 7.


Table 7

Grade of bronze	The condition of the material	Height, mm, not less
Brb2 Brbnt1,9	Soft (tempered)	8
Solid (deformed after hardening by 30−40%)	3

4.9 Strips and strips of beryllium bronze must possess the ability to dispersion hardening. The mechanical properties of the strip after aging (dispersion hardening) shall comply with the requirements specified in table 8.


Table 8

Grade of bronze	The condition of the material	Thickness of strip, mm	Rupture strength, MPa (kgf/mm)	Take tional elongation, % not less	The hardness measured by the Vickers pyramid, not less	Permissible (maximum) load definition
The thickness of the strip
0,25 — 0,35	0,40 — 0,55	0.60 or more
Brb2	After aging (after quenching)	Less than 0.15	-	-	330	5	-	-
0,15−0,25	1080−1470 (110−150)	-
More than 0.25	1130−1470 (115−150)	2,0
Brbnt1,9	Less than 0.15	-	-	330	-	10	-
0,15−0,25	1080−1470 (110−150)	-
More than 0.25	1130−1470 (115−150)	2,0
Brb2	After aging (after deformation by 30−40%)	Less than 0.15	-	-	360	-	-	30
0,15−0,25	1030−1570 (115−160)	-
More than 0.25	1170−1570 (120−160)	1,5
Brbnt1,9	Less than 0.15	-	-	360	-	-	Thirty
0,15−0,25	1030−1570 (115−160)	-
More than 0.25	1170−1570 (120−160)	1,5
Notes: 1. The hardness of the strip thickness from 0.10 to 0.25 mm inclusive is checked on the device PMT-3 at a load of 0.2 kgf with a thickness of 0.09 or less — at a load of 0.05 kgf or 01. The hardness must correspond to the values measured with a diamond pyramid (Vickers). 2. The hardness of the strip thickness from 0.10 to 0.25 mm inclusive check on the device PMT-3 at a load of 0.2 kgf with a thickness of 0,05−0,09 mm under a load of 0.1 kgf, a thickness less than 0.05 mm under load of 0.02 kgf. The hardness must correspond to the values measured with a diamond pyramid (Vickers).

4.10 At the request of the consumer and strips of beryllium bronze Brb2 brands and Brbnt1,9 are manufactured with mechanical properties in accordance with the requirements given in table 9.


Table 9

The condition of the material	Thickness of strip, mm	Temporary resistance , MPa (kgf/mm)	Elongation , % not less
Soft	0,15−0,25	390−540 (40−55)	20
More than 0.25	35
After the dispersion hardening of the soft state	0,15−0,25	1080−1370 (110−140)	-
More than 0.25	1130−1370 (115−140)	2
Solid	0,15−0,25	640−880 (65−90)	-
More than 0.25	2,5
After the dispersion hardening from the solid state	0,15−0,25	1130−1520 (115−155)	-
More than 0.25	1080−1520 (120−155)	1,5

4.11 Solid and strip of a thickness up to 1.5 mm, inclusive, shall withstand without cracking, the bend test in cold condition 90% around the mandrel with a diameter equal to two thicknesses of the strip (tape).

4.12 Microstructure of the strip after the dispersion hardening should have a uniform distribution of the inclusions phase.

The microstructure shall conform to the standards agreed upon by manufacturer and consumer.

The average value of the grain of the strip after the dispersion hardening of the soft state should not exceed 50 microns.

At the request of the consumer, the average grain size of the strip thickness of 0.5 mm and less shall be not more than 35 microns.

4.13 and Strips, the fracture should be clean, dense, should not have delamination, cavities and foreign objects. Allowed in the fracture of each sample with a width of 120 mm, the total delamination length is not more than 2 mm.

5 acceptance Rules

5.1 and Strips, and* take parties. The party should consist of a strip of the same brand of alloy, one size, one material condition shall be furnished in one document about quality that contains:

________________

* The text of the document matches the original. — Note the manufacturer’s database.


is the trademark or name and trademark of manufacturer;

— the name of the country of manufacture;

— legal address of the manufacturer and (or) the seller;

— designation strips and tapes;

— test results (as required);

— the batch number;

the weight of the party;

— the number of seats.

The mass of the party must be not more than 500 kg.

By agreement between the consumer and the manufacturer, the party should consist of beryllium bronze one the heat.

5.2 Control the appearance, width and length are subjected to every roll of tape and each strip.

5.3 For determination of chemical composition, test on the hood of the spherical hole and the bend is taken from the party on two lanes or two rolls of tapes. Allowed to the manufacturer of the sampling carried out by the molten metal.

5.4 To control the thickness of the strip from the party selected strips or rolls of tapes in the dark (by the method of maximal objectivity) according to GOST 18321.

The control plans comply with GOST 18242.

The number of selected bands or coils is determined by the table 10.


Table 10

The number of coils (strips) in the party.	The number of controlled coils (strips) in the party.
2−8	2
9−15	3
16−25	5
Correspond 26−50	8
51−90	13
91−150	20
151−280	32
281−500	50

The number of controlled points on each selected coil is determined depending on the length of the tape in the coil in accordance with table 11.


Table 11

Tape length in roll, m	The number of controlled points per roll.	Rejection number
1 to 4 incl.	2	1
SV. 4 «7 «	3	1
«7» 12 «	5	1
«12» 75 «	8	2
«75» 14* «	13	2
«140» 25* «	20	3

_______________
* The text of the document matches the original. — Note the manufacturer’s database.


The number of controlled points on each selected lane is determined depending on the total number of parcels with a length of 100 mm along the perimeter of the stripes in accordance with table 12.


Table 12

The number of parcels on the strip	The number of controlled outlets on the strip	Rejection number
2−8	3	1
9−15	5	1

If the perimeter is not a multiple of 100 mm, the end portion of a length of less than 100 mm is taken for one site.

Selected strip or tape is considered valid if the number of measurements that do not meet the requirements of tables 1 and 2, less than the acceptance number given in tables 11 and 12.

5.5 allowed the manufacturer if unsatisfactory test result on one of the selected coils or strips to control each coil or each strip party.

Allowed from the manufacturer in the production process to control the thickness of each coil or of each strip.

5.6 customer’s request thickness control is carried out on each roll and each band party.

5.7 To control the hardness, microstructure, grain size. The quality of the fracture and for tensile tests from the party select three stripes or three rolls of tape.

The bend test, control of the microstructure and the grain size is carried out periodically at the request of the consumer.

5.8 If unsatisfactory test results of at least one of the indicators of temporary resistance, relative elongation, hardness, average grain size, quality of the fracture, the depth of extrusion on it, repeat tests are carried out at twice the sample taken from the same batch. The results of repeated tests apply to the entire party.

6 Methods of control and testing

6.1 the Inspection of the surface of the strip is carried out without the use of magnifying devices.

6.2 To determine the chemical composition of each selected strip or roll of tape is taken one sample. Selection and preparation of samples for the determination of chemical composition is carried out according to GOST 24231.

Determination of the chemical composition of the strip is carried out according to GOST 15027.1 — 15027.3 GOST, GOST 15027.5 — 15027.7 GOST, GOST 15027.13, 15027.14 GOST, GOST 20068.1, GOST 20068.2.

6.3 the thickness of the strips of 0.14 mm inclusive of high accuracy measured with a micrometer type Mr GOST 4381, the thickness of the strip other sizes and precision micrometer-type ML according to GOST 6507 at a minimum distance of 50 mm from the end and not less than 10 mm from the edge. Tape width of 20 mm or less, measured in the middle.

Allowed from the manufacturer in the production process to control the thickness of the strip other means of measurement, to ensure the necessary accuracy.

Thickness control of strip is carried out with a given probability of 96%.

The thickness of the strip measured at each of the selected coils and the strip at points located uniformly randomly along the length of the strip and the perimeter band.

Measurement of the width of the strip is carried out with a ruler according to GOST 427 or caliper churchyard 166.

Measuring the length of the strip is carried out with a metal ruler according to GOST 427 or measuring tape according to GOST 7502.

6.3.1 Thickness and strip are measured at each of the selected strips or rolls of strips at points located uniformly randomly along the length of the roll or the perimeter strip using the method of «blind» (maximum objectivity) according to GOST 18321.

The tape length in meters is calculated by the formula:

,

where and  — the outer and inner diameters of the coil, measured with a ruler according to GOST 427;

 — tape thickness, mm.

The number of bands in the party , the PCs is calculated by the formula:

,

where the weight of the batch, kg;

 — strip thickness, mm;

 — band width, mm;

the length of the strip, mm;

 — material density, g/cm.

Number of controlled sections in the band , pieces, calculated by the formula:

.

The results of measuring the thickness of the strip, do not correspond to the table 1, should not differ from the permissible by more than half of the tolerance field.

If there is disagreement in the determination of the thickness of the strip control is carried out by the statistical technique.

6.4 the Camber of the strip measured in the same place at the end of the strip churchyard 26877.

6.5 For the tensile test from each selected strip or roll of tape is cut one sample in the direction of rolling.

Sampling is carried out according to GOST 24047. Tensile tests carried out according to GOST 11701 on a proportional flat samples of type I or type II: for strip thickness of 0.15−1.7 mm with 12.5 mm; 50 mm; strip thickness greater than 1.7 to 3.0 mm including 20 mm; and 80 mm.

Tensile test on strips with a thickness of 3−6 mm is carried out according to GOST 1497 on a proportional flat specimens with heads of type I, 20 mm; and mm.

6.6 To check the microstructure and the grain size, hardness and testing on the hood of the spherical holes from each selected strip or coil cut on the same model.

6.7 Test the hardness of the strip thickness to 0.25 mm inclusive conduct churchyard 9450, of a thickness exceeding 0.25 mm according to GOST 2999.

6.8 Test the depth of the extrusion by Eriksen carried out according to GOST 10510. Allowed test on the hood of the spherical holes to hold the instrument in manual mode.

Allowed the manufacturer to test the depth of extrusion on Eriksen for strip widths less than 90 mm on the samples before cutting the roll, or strip of specified width.

6.9 For bend test from each selected strip or coil is cut one sample in the direction of rolling. The bend test is carried out according to GOST 14019.

6.10 determination of the grain and strips, is carried out according to GOST 21073.0, GOST 21073.1.

6.11 To verify the quality of the fracture of each selected strip or coil cut out one sample width of 120 mm, for strip widths less than 120 mm specimen width should equal the width of the strip. The presence of the delamination test according to the method required applications B. quality Control of the fracture is carried out on the strips and tapes with a thickness of 1 mm or more.

7 Packing, marking, transportation and storage

7.1 Strip needs to be folded into bundles and strips are rolled into rolls. Internal diameter of coil shall be not less than 150 mm.

Rolls of tie wire according to GOST 3282, tape according to GOST 3560, twine GOST 17308, or other synthetic binding material according to normative-technical documentation approved in the established order.

Coils and strips wrapped with paper according to GOST 8828, 9569 or GOST GOST 2228 and placed in a way excluding their travel (the gap between the coils is filled with wood shavings, foam, or other cushioning material) in a tight wooden boxes of type III according to GOST 2991 or drums according to GOST 17065.

It is allowed to link bands and bundles of wire according to GOST 3282 or tape according to GOST 3560 with the gasket between the strips of paper according to GOST 8828, 9569 or GOST GOST 2228.

The mass of the packing units should not exceed 80 kg.

Consolidation packages in overpacks carried out in accordance with GOST 24597. Packaging is carried out on pallets according to GOST 9557 or without pallets with the use of bars with a size of 50x50 mm and a length corresponding to the width of the drawer rail in the longitudinal and transverse directions with wire of diameter not less than 2 mm according to GOST 3282или tape of size not less than 0,50x20 mm according to GOST 3560. Bond tips: twisting wire — not less than 5 turns, the tape is in the castle.

When mechanized loading and unloading weight of the package must not exceed 500 kg.

7.2 At the end of each coil or strip should be applied to the stamp of technical control.

7.3 For each bundle of strips and each roll of tape shall be attached a label showing:

— trademark or name and trademark of manufacturer;

— the name of the country of manufacturer;

— the legend strip;

— batch number;

— stamp of technical control.

7.4 it is allowed to transport the bundles of strips in light-duty and medium-duty containers according to GOST 22225, 15102 GOST, GOST 18579 without packing in boxes, and rolls of ribbons with thickness of 0.25 mm or more, wrapped in paper according to GOST 8828, 9569 GOST, GOST 2228 or wrapped in synthetic or fabrics, non-woven and tied with wire churchyard 3282, twine GOST 17308 or synthetic twine.

During transportation in containers and strips should be laid and strengthened with struts preventing them from moving inside the container. It is allowed to transport in containers and strips, Packed in boxes.

7.5 In each box or container must be attached to packing list stating:

— trademark or name and trademark of manufacturer;

— the name of the country of manufacturer;

— the legend strip;

— batch number;

— weight;

— gross mass;

— the numbers of packer.

These data shall be marked on each drawer.

7.6 Transport marking of packages — according to GOST 14192 with the application of additional labels the lot numbers and manipulation sign «Protect from moisture».

7.7 and Strip transporterowych all types of transport in covered vehicles in accordance with cargo carriage regulations applicable to transport of this species.

And strips during sea transport transporterowych in accordance with GOST 26653.

7.8 and Strip should be stored indoors. During storage and transportation and strips must be protected from mechanical damage, moisture, dust and exposure to active chemical agents.

7.9 Upon receipt of the consumer and strips should be kept in stock in the manufacturer’s packaging at least three days to equalize the temperature of the strip to the room temperature.

Under specified storage conditions consumer properties of the strip in storage is not changed.

8 manufacturer’s Warranty

8.1 the Manufacturer guarantees the conformity of the strip to the present standard requirements provided the customer observes the conditions of transportation and storage.

Annex a (informative). Theoretical weight of 1 square meter of the strip, calculated from the nominal thickness

Appendix A
(reference)

Theoretical weight of 1 mof the strip, calculated from the nominal thickness

Table A. 1

Thickness of strip, mm	Theoretical weight 1 m, kg
0,02	0,164
0,03	0,246
0,04	0,328
0,05	0,410
0,06	0,492
0,07	0,574
0,08	0,656
0,09	0,738
0,10	0,82
0,11	0,90
0,12	0,98
0,13	Of 1.07
0,14	1,15
0,15	Of 1.23
0,16	Of 1.31
0,18	1,48
0,20	1,64
0,22	1,80
0,25	Of 2.05
0,28	2,30
0,30	2,46
0,35	2,87
0,40	3,28
0,45	3,69
0,50	4,10
0,55	Of 4.51
0,60	4,92
0,65	Of 5.33
0,70	5,74
0,75	6,15
0,80	6,56
0,85	Of 6.97
0,90	Of 7.38
Of 1.00	8,20
1,10	Of 9.02
1,20	Of 9.84
1,30	10,66
1,40	Of 11.48
1,50	12,30
1,60	13,12
1,70	13,94
1,80	14,76
1,90	15,58
Of 2.00	16,40
2,20	18,04
2,50	20,50
2,80	22,96
Of 3.00	24,60
3,20	26,24
3,50	28,70
Of 4.00	32,80
4,50	36,90
5,00	41,00
5,50	45,10
6,00	49,20
Note — the Theoretical mass is calculated based on nominal thickness and strip. The density of bronze is taken equal to 8.2 g/cm.

Appendix B (mandatory). Methods of quality control of the fracture of beryllium bronze for the presence of delamination

Appendix B
(required)

This method is designed to check for delamination in the fracture of beryllium bronze and measuring the total length of these bundles.

B. 1 Instrument

Muffle furnace, type MP-2U or other furnace according to normative-technical documentation approved in the established order.

Device for automatic control and registration of temperature of the furnace type EDR-120 GOST 7164.

A device for loading samples into the furnace.

Device for the fracture of the samples.

Binocular microscope type MBS-2 or MBS-1 with the eyepiece 8and 8 eyepiecewith diopter sights and a scale (to measure the length bundles)

B. 2 preparation of samples

To check the quality of the fracture of each roll and each selected strip is cut sample with a length of 50−80 mm in the direction of hire.

B. 3 Heat treatment of samples

Samples of the beryllium bronze is heat treated in a muffle furnace. The treatment must meet the specified in table B. 1.


Table B. 1

The condition of the material	Temperature aging (dispersion hardening), °C	The time of exposure, h
Soft (tempered)	310±5	3 and warm-up time of the charge
Solid (deformed after hardening by 30−40%)	2.5 warm-up time of the charge

After aging the samples at this temperature to unload them from the furnace and cooling in air.

B. 4 quality control fracture

The samples after aging (dispersion hardening), and cooling is subjected to fracture across rolling.

Compliance specified in the mode table aging must ensure that brittle fracture of the samples.

A preliminary inspection of the fracture samples is carried out visually.

Measurement of the total bundles in the fracture is performed under binocular microscope type MBS-2 or MBS-3.

The study of fracture surface it is recommended to direct light at an inclined position of the sample. To get the most clear images of individual sections of the fracture it is necessary to change the angle of the fracture surface.

To get the size of the bundle in the eyepiece of the microscope attachment set two eyepiece: the eyepiece 88 eyepiecewith diopter sights and scale.

The price of one division of the eyepiece scale when increasing the scale of the drum of a microscope, equal to 0.6 corresponds to about 0.17.

The number of divisions of the eyepiece scale corresponding to each bundle in the fracture of one sample are added up and multiplied by the division value (0,17). The result is the total length of delamination (mm) in the fracture of one sample. If the total length of bundles exceeds the allowable value, the repeated control of the fracture at twice the number of samples.

The study of the structure of the fracture under a microscope is carried out without pre-treatment of the fracture (without the grinding, polishing and etching).

To obtain an even break before aging (dispersion hardening) of the sample is carried out pruning of 0.1 thickness across the cross-section in accordance with figure

where  — thickness of the specimen; width of the sample;  — the sample length

Annex b (informative). The yield strength and the modulus of elasticity of beryllium bronze

The App
(reference)

Table B. 1

Grade of bronze	The condition of the material	Yield strength tensile , MPa (kgs/mm)	The elastic modulus measured by the dynamic method , MPa (kgs/mm)
Brb2; Brbnt1,9	Soft	196−344 (20−35)	93−113 (9500−11500)
Solid	588−930 (60−95)	108−118 (11000−12000)
After the dispersion hardening of the soft state	930−1320 (95−135)	103−122 (10500−12500)
After the dispersion hardening from the solid state	1120−1570 (115−160)	118−27* (12000−13000)

_______________
* The text of the document matches the original. — Note the manufacturer’s database.