Bronze Brocs4-4-2,5

Designation

Name The value
Designation GOST Cyrillic БрОЦС4-4-2,5
Designation GOST Latin BpOTsC4-4-2,5
Transliteration BrOTsS4-4-25
By chemical elements BaSnZnPb4-4-2,5

Description

Bronze Brocs4−4-of 2.5 is used: for the manufacture of tapes and bands used for gaskets, bushings and bearings; bushings and pads of automobiles and tractors.

Standards

Name Code Standards
Tape В54 GOST 15885-77
Non-ferrous metals, including rare, and their alloys В51 GOST 28873-90, GOST 5017-2006

Chemical composition

Standard S P Ni Fe Cu Al Zn Sn Sb Pb Bi Mg
GOST 5017-2006 ≤0.007 ≤0.03 ≤0.3 ≤0.05 Rest ≤0.002 3-5 3-5 ≤0.002 1.5-3.5 ≤0.002 ≤0.007
Cu is the basis.
According to GOST 5017-2006, the total content of other impurities (not specified in the chemical composition) should be ≤ 0,20%.

Mechanical properties

Section, mm σU, MPa d5, % d10 HB, MPa
Bronze in the delivery condition
- 300-350 35-45 - 50-70
- 550-650 2-4 - 160-170
Ribbon (0,5-2,0 mm) and strip (of 1.58-3.0 mm) supplied according to GOST 15885-77
≥290 - ≥35 -
390-490 - ≥10 -
≥540 - ≥5 -

Description mechanical marks

Name Description
σU Limit short-term strength
d5 Elongation after rupture
d10 Elongation after rupture
HB Brinell hardness number

Physical characteristics

Temperature Е, HPa r, kg/m3 l, W/(m · °C) R, Mr. · m
20 75 8900 84 90

A description of the physical symbols

Name Description
Е The normal elasticity modulus
l Coefficient of thermal conductivity
R UD. the resistivity