Bronze БрО8С21 (БрОС8-21)
Designation
| Name |
The value |
| Designation GOST Cyrillic |
БрО8С21 |
| Designation GOST Latin |
BpO8C21 |
| Transliteration |
BrO8S21 |
| The chemical elements |
BaSn8Pb21 |
| Name |
The value |
| Designation GOST Cyrillic |
БрОС8-21 |
| Designation GOST Latin |
BpOC8-21 |
| Transliteration |
BrOS8-21 |
| The chemical elements |
BaSnPb8-21 |
Description
Bronze БрО8С21 used: for the manufacture of castings for critical 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); conical and cylindrical bushings in export performance.
Note
Vysokohromistyh bronze. The coefficient of friction of bronze without lubrication of 0.10, with a lubricant is 0.005. The maximum allowable speed — 10 m/s.
Standards
| Name |
Code |
Standards |
| Non-ferrous metals, including rare metals, and their alloys |
В51 |
STP М314-95 |
Chemical composition
| Standard |
P |
Si |
Ni |
Fe |
Cu |
As |
Al |
Zn |
Sn |
Sb |
Pb |
Bi |
Mg |
| STP М314-95 |
≤0.05 |
≤0.02 |
≤2 |
≤0.2 |
The rest |
≤0.01 |
≤0.02 |
≤2 |
7-9 |
≤0.5 |
19-23 |
≤0.005 |
≤0.02 |
Cu is the basis.
By STP M314-95, the total content of impurities should be ≤ 0.75%. The content of zinc and nickel is allowed due to the copper content.
Mechanical characteristics
| σB, MPa |
d5, % |
kJ/m2, кДж/м2 |
| Castings are supplied without heat treatment |
| ≥147 |
≥5 |
≥40 |
Description mechanical marks
| Name |
Description |
| σB |
Limit short-term strength |
| d5 |
Elongation after rupture |
| kJ/m2 |
Toughness |
Physical characteristics
| Temperature |
r, кг/м3 |
| 20 |
9300 |
A description of the physical symbols
| Name |
Description |
| l |
Coefficient of thermal conductivity |
| R |
UD. the resistivity |
