TU 14-21-5050-82

BRONZE RODS BrKh1Tsr

Technical conditions

TU 48-21-5050-82

(Replaces TU 48-21-5050-72)

These technical conditions apply to rods made of copper-chromium-zirconium alloy intended for the manufacture of electrodes and other parts for contact welding machines.

Examples of symbols:

Drawn rod (D), round (KR), normal manufacturing accuracy (N), hard (T), 15 mm in diameter, 2000 mm long, made of BrKh1Tsr alloy:

Rod DKRNT 15 x 2000 BrKh1Tsr TU 48-21-5050-82.

Pressed rod (G), round (KR), normal manufacturing accuracy (N), diameter 70 mm, length 3000 mm made of BrKh1Tsr alloy:

Rod GKRNH 70 x 3000 BrKh1Tsr TU 48-21-5050-82.

Drawn rod (D), rectangular (PR), normal manufacturing accuracy (N), hard (T), 15 mm thick, 22 mm wide, 2000 mm long made of BrKh1Tsr alloy:

Rod DPRNT 15 x 22 x 2000 BrKh1Tsr TU 48-21-5050-82.

1. TECHNICAL REQUIREMENTS

Copper-chromium-zirconium alloy rods 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 of Tables 1 and 2.

					TU 48-21-5050-82
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Developer.		Kazakova			ALLOY RODS BrX1Cr Technical conditions	Lit.			Sheet	Sheets
Checked		Pleshchuk					A		2	11
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mm Table 1

Diameter
denomination	Maximum deviations in diameter with normal manufacturing accuracy (-)
10.0 12.0	0.07
14.0 15.0 16.0 18.0 19.0 20.0	0.12
21.0 22.0 24.0 25.0 26.0 27.0 28.0	0.14
30.0 (31.0) 32.0 33.0 34.0 35.0 36.0 37.0 38.0 40.0 (41.0)	0.17
55.0 60.0	0.2
70.0 80.0	1,2

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Dimensions of rectangular bars

mm Table 2

Thickness	Limit deviations by thickness	Width	Limit deviations by width
12.7	- 0.12	15.8 25.0	- 0.4 -0.7
15.0	- 0.7	22.0	- 0.6
20.0 20.0		25.0 35.0	- 0.7
25.0		25.0
25.0		40.0	- 0.8
25.0		60.0	- 0.8
28.0		60.0
30.0 30.0		50.0 60.0
35.0 35.0		45.0 50.0

1.1.2. The length of rods with a diameter or width of up to 40 mm inclusive must be within 2-4 m.

The length of rods with a diameter or width over 40 mm should be within 1.5-3.0 m.

It is permitted to supply rods shorter than the specified length, but not shorter than 1.0 m, in quantities of no more than 10% of the batch weight.

1.2. Characteristics.

1.2.1. Round and rectangular rods are produced from bronze BrKh1Tsr. The chemical composition of the bronze must comply with the requirements of Tables 3 and 4.

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Table 3

Contents of the main components
Chemical composition, %
Chromium	Zirconium	Copper
0.4 - 1.0	0.03 - 0.08	rest

Table 4

Impurity content, %, not more than
Lead	Tin	Zinc	Nickel	Arsenic	Bismuth	Sum
0.005	0.01	0.01	0.03	0.01	0.002	0,1

The content of impurities in the alloy is not regulated, provided that the required electrical conductivity and hardness are maintained.

1.2.2. The surface of the rods must be clean, i.e. free from contaminants that hinder visual inspection of the surface, without cracks, bubbles, scale residues and foreign inclusions.

Films, nicks, tears, and scratches are allowed if, during control cleaning, they do not take the rods beyond the maximum deviations in diameter.

Ringing, tempering colours and local darkening of rods are not a rejection sign.

1.2.3. The fracture of the rods must not contain any foreign inclusions, delaminations or voids.

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

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

1.2.6. The rods must be straight. The local curvature of the rods per 1 m of length must not exceed the values specified in Table 5.

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mm Table 5

Way manufacturing rods	Limit curvature for rods with a diameter of
	from 10 to 18	from 10 to 40	from 40 to 80
drawn (for processing on machines)	1.25	1.0	1.0
pressed	-	-	6.0

1.2.7. The mechanical and physical properties of the rods must comply with Table 6.

Table 6

Rod diameter, mm	Rockwell hardness (scale B), not less than	Electrical conductivity relative to copper grade M1, %, not less than
up to and including 40 over 40 to 50 St. 50	72 70 61	80

1.2.8. Rods with a diameter of 10-60 mm are supplied drawn and heat-treated. Rods with a diameter of 70 and 80 mm are supplied pressed.

By agreement of the parties, rods with a diameter of 50 and 60 mm are supplied pressed and heat-treated.

Rectangular bars are supplied drawn.

1.3. Marking, packaging.

1.3.1. The ends of rods with a diameter greater than 35 mm must be stamped with the manufacturer's trademark and alloy grade.

Rods with a diameter of up to 35 mm are tied with wire in accordance with GOST 3282-74 into bundles weighing no more than 80 kg.

1.3.2. A metal or wooden label is attached to each bundle, indicating:

name or trademark of the manufacturer,

alloy grade,

batch number.

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2. ACCEPTANCE RULES

2.1. The bars are presented for acceptance in batches without weight restrictions. The batch must consist of bars of the same size and the same delivery condition.

2.2. Each rod is subject to surface quality control, and 5 rods from a batch are measured.

2.3. To control hardness and electrical conductivity, two samples are taken from different rods.

2.4. Fracture control is performed on three rods from a batch. Rods with broken ends are not cut off when sent to the consumer.

2.5. The curvature control of the rods is carried out on two rods from a batch,

2.6. The chemical composition of the alloy is controlled on two samples from different rods. It is permissible for the manufacturer to control the chemical composition on samples from the molten metal of each heat.

2.7. If unsatisfactory control results are obtained for at least one indicator, a repeat control is carried out on a double number of samples taken from the same batch.

The results of the re-inspection are final and apply to the entire batch.

2.8. For each batch of rods, the customer is sent a document certifying the quality of the rods, indicating:

name of the manufacturer,

conventional designation of products,

batch numbers,

test results,

net weight of the lot,

signature and stamp of the Quality Control Department.

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3. CONTROL METHODS

3.1. The surface of the rods is checked by inspection without the use of magnifying devices.

3.2. The dimensions of the rods are controlled by:

- diameter - with calipers according to GOST 166-80,

- length - with a metal measuring tape according to GOST 7502-69,

- local curvature - with a feeler gauge according to GOST 882-75 or a metal measuring ruler

according to GOST 427-75 using a verification ruler according to GOST 8026-75 on a verification plate

according to GOST 10905-75.

3.3. Hardness is determined on the side surface of the rods according to GOST 9013-59 (ST SEV 469-77).

3.4. Electrical conductivity is determined by the electroinductive method on devices for measuring the specific electrical conductivity of products of the IE-1, VE-20N type and other similar ones, followed by recalculation into specific electrical resistance using the formula:

specific electrical resistance = 1/electrical conductivity.

The electrical conductivity of rods with a diameter of less than 15 mm is determined on a resistance bridge using samples in their natural form according to the manufacturer's method.

3.5. The fracture test is performed at the manufacturing plant on a pressed blank. To test the metal in the fracture, a cut is made on both sides of the pressed blank so that the fracture passes through the central part, after which the blank breaks.

3.6. Control of chemical composition is carried out in accordance with GOST 23859.0-79 - GOST 23859.2-79.

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4. TRANSPORTATION AND STORAGE

Transportation and storage according to GOST 1628-78.

5. MANUFACTURER'S WARRANTIES

The manufacturer guarantees that the quality of the rods meets the requirements of these technical conditions, subject to the conditions of transportation and storage.

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List of normative and technical

documents referenced

in TU 48-21-5050-82

GOST 166-80	Calipers. Technical conditions.
GOST 427-75	Measuring metal rulers. Basic parameters and dimensions. Technical requirements.
GOST 882-75	Probes. Basic parameters. Technical requirements.
GOST 2991-76	Non-collapsible wooden boxes. General specifications.
GOST 3282-75	General purpose low-carbon steel wire.
GOST 7502-80	Measuring metal tape measures.
GOST 8026-75	Verification and marking rulers. Technical requirements.
GOST 1628-78	Bronze rods. Technical conditions.
GOST 9013-59 (ST SEV 469-77)	Metals and alloys. Rockwell hardness test method. Scale A, B and C.
GOST 10905-75	Verification and marking plates. Technical requirements.
GOST 23859.0-79- -23859.2-79	Heat-resistant bronzes. Methods of chemical analysis.

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USSR MINISTRY OF NON-FERROUS METALLURGY

OKP 18 4570 AGREED Boss Management Chief metallurgist NIIavtoprom A.I. Falitnov

UDC 669.35'62-432 Group B 55 I APPROVE Chief Engineer VPO "Soyuztsvetmetobrabotka" G.I. Sarul

BRONZE RODS BrKh1Tsr

Technical conditions

TU 48-21-5050-82

(Replaces TU 48-21-5050-72)

Change 1.

Valid from 01.01.84

Deputy Director Giprotsvetmetobrabotka A.M. Rytikov AGREED Boss Department of New Materials AvtoVAZ K.G. Sednev Director of NIIATM B.G. Karnaukhov

Chief Engineer LPO "Krasny Vyborzhets" A.M. Nikiforov

1983

The "Characteristics" section shall be supplemented with clause 1.2.9 as amended:

"The mechanical and physical properties of the pressed rods are not determined."

					TU 48-21-5050-82
Change	Sheet	Doc. No.	Subp.	Date
Developer.		Kazakova			BRONZE RODS BrX1Cr Technical conditions Change 1	Lit.			Sheet	Sheets
Checked		Pleshchuk					A		2	2
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Ministry of Non-Ferrous Metallurgy of the USSR

OKP 18 4474

Group B 55 I APPROVE Chief Engineer VPO "Soyuztsvetmetobrabotka" G.I. Sarul

Change Notice 2

technical conditions

TU 48-21-5050-82

BRONZE RODS BrKh1Tsr

AGREED Head of the Laboratory Research Department AvtoVAZ bodywork V.G. Azizbekyan Director of NIIATM B.G. Karnaukhov

Chief Engineer LPO "Krasny Vyborzhets" Yu.N. Chuvashov Deputy Director Giprotsvetmetobrabotka V.N. Fedorov

1987

LPO "Red Vyborg resident"

NOTICE

Designation

Cause

Cipher

Sheet

Sheets

0810.45-87

TU 48-21-5050-82

Extension of validity

0

2

2

THAT

Release date

Change date

Validity period of the PI

Implementation Directive

Implement from 01.03.88

Backlog

It does not affect the backlog

Change

Contents of the change

Applicability

2

Title page OKP 18 4570 4474 The validity period of the technical conditions shall be extended until 01.01.98. Sheets 3, 4 without amendments shall be cancelled and replaced by sheets 3, 4, amendment 2. Sheet 5 p. 1.2.2. _____ scale and foreign inclusions . prints _____ captivity, nicks, burrs _____ Sheets 6, 7, 8, 9 and 10 without changes, cancel and replace sheets 6, 7, 8, 9 and 10, amendment 2.

Send out

Compiled by

Checked

T. counter.

N. counter.

Approved

Representative of the OGPP

Zotova

14.12 87

Pleshchuk

Kozyreva

14.12 87

Saveliev

Application

Sheets: 3, 4, 6, 7, 8, 9 and 10 rev. 2

The original has been corrected

Counter copy corrected

GOST 2.106-68

Table 1

Diameter, mm		State supplies	Theoretical mass 1 m of rods, kg	OKP code
denomination	maximum deviations (-)
10.0 12.0	0.7	drawn out	0.70 1.01		18 4474 0706 18 4474 0707
14.0 15.0 16.0 18.0 19.0 20.0	0.12		1.37 1.57 1.79 2.27 2.52 2.8		18 4474 0708 18 4474 0708 18 4474 0709 18 4474 0710 18 4474 0710 18 4474 0711
21.0 22.0 24.0 25.0 26.0 27.0 28.0	0.14		3.08 3.38 4.02 4.37 4.73 5.09 5.48		Same -"- -"- 18 4474 0712 Same -"- -"-
30.0 32.0 33.0 34.0 35.0 36.0 37.0 38.0 40.0	0.17		6.29 7.16 7.61 8.08 8.56 9.06 9.57 10.09 11.18		18 4474 0713 Same -"- -"- -"- -"- -"- -"- -"-
55.0 60.0	0.2		21.15 25.16		18 4474 0714 18 4474 0714
70.0 80.0	1,2	pressed	34.25 44.74		18 4474 0943 18 4474 0943

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GOST 2.106-68

RECTANGULAR DRAWN RODS

Table 2

Thickness, mm		Width, mm		Theoretical mass of 1 m of rods, kg	OKP code
denomination	maximum deviations	denomination	maximum deviations
12.7	-0.12	15.8 25.0	-0.4 -0.7	1.79 2.83 2.94 4.45 6.23 5.56 8.9 13.4 14.9 13.4 21.4 14.02 15.6	18 4474 0715 18 4474 0715 18 4474 0716 18 4474 0717 18 4474 0717 18 4474 0718 Same -"- -"- -"- -"- 18 4474 0719 18 4474 0719
15.0	-0.7	22.0	-0.6
20.0		25.0 35.0	-0.7
25.0		25.0
		40.0	-0.8
		60.0
28.0		60.0
30.0		50.0 60.0
35.0		45.0 50.0

1.1.2. The length of rods with a diameter or width of up to 40 mm inclusive should be within 2-4 m, over 40 mm - within 1.5-3 m.

It is permitted to supply rods shorter than the specified length, but not shorter than 1 m, in quantities of no more than 10% of the batch weight.

1.2. Characteristics.

1.2.1. The rods are made of bronze grade BrKh1Tsr, the chemical composition of which must comply with the requirements of Tables 3 and 4.

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GOST 2.106-68

Table 5

Method of manufacturing rods	Limit curvature for rods with a diameter of
	from 10 to 18	from 18 to 40	over 40 to 80
Drawn (for processing on machines)	1.25	1.0	1.0
Pressed	-	-	6.0

1.2.7. Rods up to 60 mm in size are supplied heat-treated.

1.2.8. The electrical conductivity of rods with a diameter or thickness of up to 15 mm must be at least 46 m/Ohm mm².

For rods with a diameter or thickness over 15 mm, the electrical conductivity relative to M1 copper must be at least 80%.

1.2.9. The mechanical properties of the rods must comply with the requirements of Table 6.

Table 6

The diameter or thickness of the rod, mm	Rockwell hardness (B scale), not less than
up to 40 incl.	72
over 40 to 50 incl.	70
St. 50	61

1.3. Marking.

Rods with a diameter of up to 35 mm inclusive are tied into bundles weighing no more than 80 kg. A metal or plywood label indicating the following must be attached to each bundle:

- the trademark of the manufacturer,

- alloy grades,

- batch numbers,

- quality control stamps.

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GOST 2.106-68

On rods with a diameter greater than 35 mm, the manufacturer's trademark and alloy grade must be stamped.

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, 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 customer's request, specified in the order),

- the mass of the batch.

The batch weight is not limited.

2.2. The rods are subjected to acceptance tests. The sequence of tests is in accordance with Table 7.

Table 7

Name tests	Item numbers THAT	Sample size for testing
1	2	3
2.2.1. Control sizes	1.1.1., 1.1.2., 1.2.5., 3.1.	Five rods from the batch
2.2.2. Control chemical composition	1.2.1., 3.2.	The consumer is in control chemical composition on two samples from two rods of the party. Manufacturing company controls chemical composition:

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GOST 2.106-68

Continuation of table 7

1	2	3
		on samples from melted metal of each melt and pourings; from each batch of finished products one sample is taken for alloy control components.
2.2.3. Control qualities surfaces	1.2.2., 1.2.4., 3.3.	Each rod is from a batch.
2.2.4. Absence internal defects	1.2.3., 3.4.	Three rods from the batch. At the manufacturing plant fracture testing is allowed produce on pressed preparation.
2.2.5. Control curvatures	1.2.6., 3.5.	Two rods from the batch.
2.2.6. Control mechanical and physical properties	1.2.8., 1.2.9.	Same

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.

The results of the re-inspection are final and apply to the entire batch.

3. CONTROL METHODS

3.1. The diameter and ovality of rods are measured with a micrometer in accordance with GOST 6507-78 or a caliper in accordance with GOST 166-80, the thickness and width - with a caliper in accordance with GOST 166-80, the length - with a metal tape measure in accordance with GOST 7502-80.

3.2. The selection and preparation of samples for chemical analysis is carried out in accordance with GOST 24231-80.

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GOST 2.106-68

Chemical analysis is carried out according to GOST 25086-81, GOST 23859.1-79, GOST 23859.3-79, GOST 23859.6-79, GOST 23859.7-79, GOST 23859.8-79, GOST 23859.11-79.

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

3.4. To check the metal in a fracture, a cut is made in the pressed blank or rod on both sides so that the fracture passes through the central part, after which the blank or rod is broken.

When sending to the consumer, it is permissible to leave the broken end of the rod uncut.

3.5. The curvature is measured in accordance with GOST 26877-86.

3.6. Hardness is determined on the side surface of the rods according to GOST 9013-59 (ST SEV 469-77).

3.7. The electrical conductivity of rods with a diameter or thickness of up to 15 mm is determined on samples in their natural form on a resistance bridge with subsequent recalculation into specific electrical resistance using the formula: .

The electrical conductivity of rods with a diameter or thickness greater than 15 mm is determined by the electroinductive method using devices such as IE-1, VE-20N or other similar devices.

4. TRANSPORTATION AND STORAGE

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

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GOST 2.106-68

Application

mandatory

SCROLL

normative and technical documents,

to which reference is given in TU 48-21-5050-82

1. GOST 166-80	Calipers. Technical conditions.
2. GOST 1628-78	Bronze rods. Technical conditions.
3. GOST 6507-78	Micrometers with a division value of 0.01 mm.
4. GOST 7502-80	Measuring metal tape measures.
5. GOST 9013-59 (ST SEV 469-77)	Metals. Test methods. Rockwell hardness measurement.
6. GOST 23859.1-79	Heat-resistant bronzes. Method for determination of copper.
7. GOST 23859.3-79	Heat-resistant bronzes. Method for determination of chromium.
8. GOST 23859.6-79	Heat-resistant bronzes. Method for determination of nickel.
9. GOST 23859.7-79	Heat-resistant bronzes. Method for determination of nickel.
10. GOST 23859.8-79	Heat-resistant bronzes. Methods for determination of zirconium.
11. GOST 23859.11-79	Heat-resistant bronzes. Determination of chromium, nickel, cobalt, iron, zinc and magnesium by atomic absorption spectrometry.
12. GOST 24231-80	Non-ferrous metals and alloys. General requirements for the selection and preparation of samples for chemical analysis.
13. GOST 25086-81	Non-ferrous metals and their alloys. General requirements for analysis methods.
14. GOST 26877-86	Metal products. Methods for measuring form deviations.

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