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Bronze БрО8С12 (БрОС8-12)

Designation

Name The value
Designation GOST Cyrillic БрО8С12
Designation GOST Latin BpO8C12
Transliteration BrO8S12
The chemical elements BaSn8Pb12
Name The value
Designation GOST Cyrillic БрОС8-12
Designation GOST Latin BpOC8-12
Transliteration BrOS8-12
The chemical elements BaSnPb8-12

Description

Bronze БрО8С12 used: for the manufacture of castings bushings and responsible of bearings, operating at high pressure; castings parts metallurgical machinery (large bearings heavy mill, crushers and other parts subject to friction at high pressures and speeds).

Note

Vysokohromistyh bronze. Is a substitute of bronze stamps Bra9zh3l (Brazh9−4L). The coefficient of friction of bronze without lubrication of 0.10, with a lubricant is 0.005. The maximum allowable speed — 10 m/s Maximum load capacity: static — 700 kgf/cm2.

Standards

Name Code Standards
Castings from non-ferrous metals and alloys В84 OST 24.916.01-71
Non-ferrous metals, including rare metals, and their alloys В51 STP М314-95

Chemical composition

Standard S P Si Ni Fe Cu As Al Zn Sn Sb Pb Bi Mg
OST 24.916.01-71 ≤0.05 ≤0.05 ≤0.02 ≤1.5 ≤0.2 The rest - ≤0.02 - 7-9 - 11-13 ≤0.005 ≤0.02
STP М314-95 - ≤0.05 ≤0.02 ≤2 ≤0.2 The rest ≤0.01 ≤0.02 ≤2 7-9 ≤0.5 11-13 ≤0.005 ≤0.02
Cu is the basis.
According to OST 24.916.01-71 and STP M314-95 the total content of impurities should be ≤ 0.75%. The content of nickel is allowed due to the copper content.
According to STP M314-95, the content of zinc is allowed due to the copper content.

Mechanical characteristics

σB, MPa d Brinell hardness number, MPa
Castings are supplied without heat treatment
≥147 ≥5 ≥60
≥147 ≥5 ≥65

Description mechanical marks

Name Description
σB Limit short-term strength
d Elongation after rupture

Physical characteristics

Temperature Е, ГПа r, кг/м3
20 735 9100

A description of the physical symbols

Name Description
l Coefficient of thermal conductivity
С Specific heat

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