Bronze Áðõ1öð used: for the manufacture of ingots; — long products and flat-rolled metal; round bars with a diameter of 10−80 mm and rectangular bars with a thickness of from 12.7 to 35.0 mm, designed for the manufacture of electrodes and other parts for welding machines.

Note

Low alloy bronze copper-chromium-zirconium.

Standards

Name	Code	Standards
Non-ferrous metals, including rare, and their alloys	В51	GOST 28873-90, TU 1846-00195430-98-99, TU 48-21-5065-84
Tape	В54	TU 48-0810-192-90
Bars	В55	TU 48-21-5050-82
Sheets and strips	В53	TU 48-21-5066-82

Chemical composition

Standard	Cr	Ni	Cu	As	Zn	Sn	Pb	Bi	Zr
TU 48-21-5050-82	0.4-1	≤0.03	Rest	≤0.01	≤0.01	≤0.01	≤0.005	≤0.002	0.03-0.08

Cu is the basis.
According to TU 48-21-5050-82, the chemical composition is given for the alloy (bronze) of the brand BrKh1Cr. The total content of impurities should not be more than 0.10%. The content of impurities in the alloy is not regulated provided that the required electrical conductivity and hardness are maintained.

Mechanical properties

Section, mm	HRB
Bars, drawn and extruded in the delivered state on the other 48-21-5050-82
≤40	≥72
40-50	≥70
50	≥61

Description mechanical marks

Name	Description
HRB	Rockwell hardness (indenter steel, spherical)

Technological properties

Name	The value
Conductivity	Conductivity rods of alloy grade Áðõ1öð with a diameter of 15 mm should be not less than 46 m/Ω·mm2. For bars with diameter over 15 mm the relative conductivity of copper marks M1 must be at least 80%.

Bronze Áðõ1öð

Designation

Description