TU 1846-001-77767692-2006

OKP 18 4670

UDC 669.35-422 Group B 55 I APPROVE General manager LLC "ASTRINSPLAV SK" Logachev A.B. "16" August 2006

BRONZE RODS BrNHK(F)

TECHNICAL SPECIFICATIONS

TU 1846-001-77767692-2006

The term of introduction is from . . . . . . . The term of validity is unlimited

AGREED Deputy General Director JSC "Institute of Non-Ferrous Metalworking" Ashikhmin G.V. Deputy Chief Technologist MKB "Horizon" FSUE MPP "Salut" Lykhin V.A. Technical Director ZKS CJSC Dyakonov N.M.

DEVELOPED Director of Production LLC "Astrinsplav SK" Badulkin V.F. Head of the laboratory JSC "Institute" "Color metalworking" Nikolaev A.K.

Saint Petersburg

2006

CONTENT

1. TECHNICAL REQUIREMENTS 3

1.1. Basic parameters and dimensions 3

1.2. Characteristics 4

1.3. Marking 5

1.4. Packaging 6

2. ACCEPTANCE RULES 6

3. CONTROL METHODS 7

4. TRANSPORTATION AND STORAGE 7

5. MANUFACTURER'S WARRANTIES 7

Appendix A 8

Appendix B 9

Appendix B 13

These technical conditions apply to drawn and pressed rods made of BrNHK(F) bronze, intended for the manufacture of welding tools, parts and assemblies used in various branches of industry (Appendix B).

Examples of symbols.

Drawn (D) or pressed (P) rod, round (KR), normal manufacturing accuracy (N), hard (T), diameter, measured length (MD), non-measured length (ND) made of BrNKhK(F) alloy.

Bronze rod drawn, round, normal accuracy, solid, 15 mm in diameter, measured length made of BrNHK(F) alloy

Rod DKRNT 15x1250 BrNHK(F) TU 1846-001-77767692-2006.

Pressed bronze rod, round, normal accuracy, solid, 100 mm in diameter, non-dimensional length made of BrNHK(F) alloy

Rod PKRNT 100xND BrNHK(F) TU 1846-001-77767692-2006.

The list of regulatory documents referenced in these TU is given in Appendix "A".

1. TECHNICAL REQUIREMENTS

Rods made of BrNHK(F) alloy must comply with the requirements of these technical conditions.

1.1. Basic parameters and dimensions.

1.1.1. The dimensions of the bars and the maximum deviations depending on the delivery condition must comply with the requirements specified in Tables 1, 2 and 3.

Table 1.

Round drawn rods.

Diameter, mm	Maximum deviation in rod diameter in in accordance with manufacturing accuracy, mm
5 - 6	- 0.12
7 - 10	- 0.15
11 - 18	- 0.18
19 - 30	- 0.21
31 - 35	- 0.25

Table 2.

Round pressed rods.

Diameter, mm	Maximum deviation in diameter, mm
40 - 50	- 1.6
55 - 80	- 1.9
85 - 100	- 2.2
110 - 170	- 2.5

Table 3.

Square and hexagonal extruded rods

Diameter, mm	Maximum deviation in diameter inscribed circle, mm
10 - 18	- 0.18
19 - 30	- 0.21
31 - 40	- 0.25

Note: The size of square and hexagonal section rods is taken as the diameter of the inscribed circle, i.e. the distance between the parallel faces of the rod.

1.1.2. By additional agreement with the customer, it is possible to manufacture pressed rods of round, square and rectangular cross-sections of intermediate sizes (Table 2) and above those specified in Table 3.

1.1.3. According to length, rods are manufactured:

a) non-dimensional length from 300 to 2000 mm (conditionally);

b) measured length within the limits of non-measured length with maximum deviations:

+ 10 mm - for drawn rods of all sizes;

+15 mm - for pressed rods up to 50 mm in size;

+ 20 mm - for pressed rods larger than 50 mm.

c) multiple measured length - within the limits of non-measured length with an allowance of 5 mm per cut and with a general length tolerance in accordance with listing (b).

1.1.4. Drawn rods with a diameter of 6 mm or less may be rolled into coils. The length of the rod in the coil must be at least 3 m.

1.2. Characteristics.

1.2.1. The rods are made of bronze grade BrNHK(F), the chemical composition of which must comply with the requirements of Tables 4 and 5.

Table 4.

Contents of the main components
Chemical composition, % by weight
Nickel (Ni)	Chromium (Cr)	Silicon (Si)	Copper (Cu)
2.4 - 2.8	0.5 - 1.0	0.5 - 0.9	Ost.

Table 5.

Impurity content. % by weight, not more than
Iron (Fe)	Phosphorus (P)	Lead (Pb)	Tin (Sn)	Zinc (Zn)	Sum
0.10	0.03	0.01	0.05	0.15	0.4

Note: The impurity content is guaranteed by the original batch, and the sum of impurities may be more than 0.4%, provided that the standards for hardness and electrical conductivity are met.

1.2.2. At the melting stage, a technological additive in the form of a carbon fulleroid nanomodifier "Astralen" (TU 2166-001-13800624-2003) is introduced into the composition of the BrNHK(F) alloy.

1.2.3. The surface of the rods must be free of contamination that hinders visual inspection of the surface, without cracks and delamination. Small films, dents, cavities, scratches, ringing, traces of straightening are allowed on the surface, if they do not take the rods beyond the maximum deviations in diameter during control cleaning. Ringing, tempering colors and darkening are not rejection signs.

1.2.4. The cross-section of the rods must not contain any foreign inclusions, delaminations, voids, or compression shrinkage.

1.2.5. The rods must be cut evenly and must not have significant burrs.

1.2.6. Ovality should not take the rods beyond the maximum deviations in diameter.

1.2.7. The rods must be straight. The curvature of drawn rods must not exceed 2 mm per 1 m of length, and for pressed rods - 4 mm per 1 m of length.

1.2.8. The rods must be heat treated. By separate agreement with the customer, the rods may be supplied without heat treatment.

1.2.9. The controlled properties of the rods must be no less than those specified in Table 6 (Appendix B).

Table 6.

Method of manufacturing rods	Hardness		Electrical conductivity, MSm/m	Specific electrical resistance, μOhm cm
	HRB	HB
Pulled	93	200	24	4.17
Pressed	89	180	24	4.17

1.2.9. Uncontrolled typical properties of the BrNHK(F) alloy are given in the reference Appendix B.

1.3. Marking.

The rods are tied into bundles weighing no more than 80 kg. Each bundle must be attached with a metal or plywood tag indicating:

- names and symbols of products;

- trademark of the manufacturer;

- alloy grades;

- batch numbers;

- quality control stamps;

- designations of these technical conditions - TU 1846-001-77767692-2006.

1.4.Packaging.

The rods are supplied without packaging, tied into bundles in accordance with the requirements of GOST 1628-78.

2. ACCEPTANCE RULES.

2.1. Rods are accepted in batches. A batch must consist of rods of the same size, profile, manufacturing method, delivery condition and be issued with one quality document containing:

- name and trademark of the manufacturer;

- conventional designation of rods;

- batch number;

- test results (at the request of the consumer, specified in the order);

- the mass of the batch.

The batch weight is not limited.

2.2. The rods are subject to acceptance tests.

The sequence of tests is in accordance with Table 7.

Table 7.

Name tests	Numbers points THAT	Sample size for testing
2.2.1. Control sizes.	1.1.1., 1.1.2., 1.2.6., 3.1.	Five rods from the batch.
2.2.2. Control chemical composition.	1.2.1., 3.2.	The manufacturer controls the chemical composition of metal samples from each melt.
2.2.3. Control qualities surfaces.	1.2.3., 1.2.4., 1.2.5., 3.3.	In accordance with GOST 18242-72
2.2.4. Control curvature.	1.2.7., 3.4.	Two rods from the batch.
2.2.5. Control mechanical and physical properties.	1.2.9., 3.6., 3.7.	Two rods from a batch (determined on transverse surface of the template samples at least 10 mm thick, cut from rods).

2.3. If unsatisfactory control results are obtained for at least one indicator, a repeat test is carried out on a double number of samples taken from the same batch. If the result of the repeat test is negative, each bar of the batch is subject to property control.

3. Control methods.

3.1. The diameter and ovality of rods are measured using a micrometer in accordance with GOST 6507-90 or a caliper in accordance with GOST 166-89, the thickness and width - using a caliper in accordance with GOST 166-89, the length - using a metal tape measure in accordance with GOST 7502-98.

3.2. The selection and preparation of samples for chemical analysis and chemical analysis are carried out according to the manufacturer's method.

3.3. Quality control of the rod surface is carried out by inspection without the use of magnifying devices.

3.4. The curvature is measured in accordance with GOST 26877-91.

3.5. Hardness is determined on witness samples from each batch of rods according to GOST 9013-59 (Rockwell, scale B) or according to GOST 9012-59 (Brinell).

3.6. The electrical conductivity of rods with a diameter greater than 10 mm is determined by the electroinductive method using devices of the IE-1, VE-2011, VE-17NC/5 type.

The electrical conductivity of rods with a diameter of less than 10 mm is determined on samples by measuring on a resistance bridge, followed by recalculation into electrical conductivity using the formula 1/ρ.

4. Transportation and storage.

Transportation and storage of rods in accordance with the requirements of GOST 1628-78.

5. Manufacturer's warranties.

Finished products must be accepted by the technical control of the manufacturer.

The manufacturer guarantees that the rods comply with all requirements of these technical specifications.

APPENDIX A

(Required)

SCROLL

normative and technical documents,

which are referenced in TU 1846-001-77767692-2006.

1. GOST 166-89	Calipers. Technical conditions.
2. GOST 1628-78	Bronze rods. Technical conditions.
3. GOST 6507-90	Micrometers. Technical conditions.
4. GOST 7502-98	Measuring metal tape measures. Technical conditions.
5. GOST 9012-59	Metals. Brinell hardness test method.
6. GOST 9013-59	Metals. Rockwell hardness test method.
7. GOST 26877-91	Metal products. Method of measuring shape deviations.
8. TU 2166-001-13800624-2003	Nanomodifier "Astralen". Technical conditions.

TU 1846-001-77767692-2006

APPENDIX B

(Reference)

Typical properties of the BrNHK(F) alloy.

1. Melting point, °C 1070 ± 5

2. Density, g/ cm3 8.85

3. Heat capacity, kJ/kg deg 0.385

4. Coefficient of linear expansion, α.10 -6 , 1/deg

Temperature, °C	20-100	20-200	20-300	20-400	20-500	20-600	20-700
α.10 -6 , 1/deg	16.5	16.8	17.0	17.5	17.9	18.2	18.5

5. Specific electrical resistance, ρ μOhm cm

Temperature, °C	20	100	200	300	400	500	600	700
ρ μOhm cm	3.7	4.2	4.9	5.6	6.8	7.2	8.6	10.9

6. Thermal conductivity λ, W/m deg

Temperature, °C	20	100	200	300	400	500	600	700
λ, W/m·deg	200	210	230	260	270	270	250	240

7. Modulus of elasticity E.10 -10 , N/m 2

Temperature, °C	20	100	200	300	400	500	600	700
E.10 -10 , N/m 2	14.0	13.85	13.42	12.80	12.20	11.60	10.85	9.85

TU 1846-001-77767692-2006

8. Influence of test temperature on mechanical properties of the alloy.

Name properties	Test temperature, °C
	20	200	300	400	500	600	700	800
Limit strength σ in , MPa	750	710	650	550	450	300	150	50
Yield strength σ 0.2 , MPa	700	650	600	540	440	270	110	35
Relative elongation δ 5 , %	15	13	10	7	5	15	25	30
Hardness, HV	240	-	200	180	120	90	50	-
Hardness, HV (duration 60 min)	-	-	-	130	100	55	25	-

9. Dependence of the mechanical properties of the alloy on the annealing temperature

(annealing time 1 hour)

Name properties	Annealing temperature, °C
	20	100	200	300	400	500	600	700
Limit strength σ in , MPa	750	750	750	730	680	650	450	350
Yield strength σ 0.2 , MPa	700	650	600	540	440	300	150	40
Relative elongation δ 5 , %	10	10	5	2	1	23	10	40

10. Bending elastic limit

σ 0.005 , MPa 500-600

σ 0.002 , MPa 400-500

TU 1846-001-77767692-2006

11. Recrystallization temperature, °C 500

Softening temperature

(thermal stability), °C 550

12. Fatigue limit in bending based on 10 7 cycles

σ -1 , MPa 250-300

13. Stress relaxation, %

Voltage and time tests	Test temperature, °C
	+20	+100	+150	+200
Voltage - 50% of σ 0.005 , time - 250 hours	4-5	6-7	10-12	15-20

14. The TEMF of the alloy relative to copper, µV/deg 5-6

APPENDIX B

(Reference)

Hardness Value Conversion Table

Vickers (F ≥ 98N) HV	Brinell (0.102 F/D2 = 30) HB	Rockwell HRB		Vickers (F ≥ 98N) HV	Brinell (0.102 F/D2 = 30) HB	Rockwell HRB
100 101 103 104 105	95 96 98 99 100	50 51 52 53 54		158 160 163 166 168	150 152 155 158 160	80 81 82 83 84
106 108 109 110 113	101 103 104 105 107	55 56 57 58 59		173 177 180 185 189	164 168 171 176 180	85 86 87 88 89
114 115 117 119 120	108 109 111 113 114	60 61 62 63 64		194 199 204 209 216	184 189 194 199 205	90 91 92 93 94
122 124 125 127 131	116 118 119 121 124	65 66 65 68 69		221 226 234 240 249	210 215 222 228 237	95 96 97 98 99
132 135 136 139 141	125 128 129 132 134	70 71 72 73 74		254 260 270 280 290	241 247 257 266 276	100 (101) (102) (104) (105)
144 146 149 153 155	137 139 142 145 147	75 76 77 78 79

Note.

1. Recalculation of the value HB = 0.95 HV

2. The hardness values given in brackets correspond to an approximate estimate in

comparison with standard test methods.

3. The conversion of one hardness value to another contains some

statistical inaccuracy.

30. PRODUCT CHARACTERISTICS

They are intended for the production of welding tools, as well as for parts used in various industries.

The rods are produced drawn and pressed, round, square and hexagonal, with normal manufacturing accuracy, solid, of measured and non-measured length.

Name of the indicator	Values of the indicators for rods
	drawn round	pressed
		round	square and hexagonal
Diameter, mm	5…35	40…170	10…40 *)
Length in bundles, mm	300…2000
Length in a coil, m, not less than	3
Hardness^ HRB HB	93 200	89 180	89 180
Electrical conductivity, MS/m	24
Specific electrical resistance, μOhm cm	4.17

*) the diameter of the inscribed circle is indicated.

		Surname	Signature	Date	Telephone
Presented	04	A.B. Logachev		22.12.2006	(812) 740-62-37
Filled in	05	V.F. Badulkin		22.12.2006	(812) 740-62-37
Registered	06	I.E. Avdochenok		22.12.2006	(812) 575-01-06
Added to the catalog	07