BrO8S12 (BrOS8-12)
responsible for bearings operating at high pressures
Classification
| Country |
Section |
Category |
| CIS, Russia, Ukraine |
Bronze |
Tin cast bronze |
Chemical composition
| Standard |
Fe, % |
Sn, % |
Mg, % |
Bi, % |
Cu, % |
Ni, % |
Al, % |
Pb, % |
P, % |
S, % |
|---|
|
< 0.2 |
7–9 |
< 0.02 |
< 0.005 |
76.155–82 |
< 1.5 |
< 0.02 |
11–13 |
< 0.05 |
< 0.05 |
Information on suppliers
Physical characteristics
| Temperature, °C |
$$E\cdot 10^{9}$$, $$MPa$$ |
$$\alpha\cdot 10^{6}$$, $$K^{-1}$$ |
$$\rho$$, $$\frac{kg}{m^3}$$ |
|---|
| 20 |
0.735 |
|
9100 |
| 100 |
|
17.1 |
|
Mechanical properties at 20 °C
| Rolling |
Standard |
Size, mm |
Tension |
Classifiers |
$$\sigma _{U}$$, $$MPa$$ |
$$\sigma_{Y}$$, $$MPa$$ |
$$\sigma_{0.5}$$, $$MPa$$ |
$$KCU\cdot 10^{3}$$, $$\frac{J}{m^2}$$ |
Treatment |
|---|
| Casting |
|
|
|
in sandy form |
145–175 |
100 |
3–8 |
98–137 |
|
| Casting |
|
|
|
in chill mold |
145–195 |
115 |
|
|
|
Brinell hardness number
| Rolling |
Standard |
Classifiers |
Value, HBW |
| Casting |
|
in chill mold |
78.5–118 |
| Casting |
|
in sandy form |
68.5–98 |
Casting and technological parameters
| melting point, °C |
linear shrinkage, % |
the temperature of the casting, °C |
|---|
| 940 |
1.4 |
1150 |
Coefficients of Friction
| coefficient of friction with lubrication |
coefficient of friction without lubrication |
|---|
| 0.005 |
0.1 |
Standards
Description of chemical elements
| Element |
Units of measurement |
Description |
| Fe |
% |
Iron |
| Sn |
% |
Tin |
| Mg |
% |
Magnesium |
| Bi |
% |
Bismuth |
| Cu |
% |
Copper |
| Ni |
% |
Nickel |
| Al |
% |
Aluminium |
| Pb |
% |
Lead |
| P |
% |
Phosphorus |
| S |
% |
Sulfur |
Description of physical characteristics
| Parameter |
Units of measurement |
Description |
| $$E\cdot 10^{9}$$ |
$$MPa$$ |
Elastic modulus |
| $$\alpha\cdot 10^{6}$$ |
$$K^{-1}$$ |
Coefficient of thermal (linear) expansion (range 20°C–T) |
| $$\rho$$ |
$$\frac{kg}{m^3}$$ |
The density of the material |
Description of mechanical properties
| Parameter |
Units of measurement |
Description |
| $$\sigma_{Y}$$ |
$$MPa$$ |
Yield strength |
| $$\sigma_{0.5}$$ |
$$MPa$$ |
Tensile stress required to produce a total elongation of 0.5% |
| $$\sigma _{U}$$ |
$$MPa$$ |
Ultimate tensile strength |
| $$KCU\cdot 10^{3}$$ |
$$\frac{J}{m^2}$$ |
Impact toughness |
Description of the casting and technological parameters
| Parameter |
Units of measurement |
Description |
| melting point |
°C |
The temperature at which solid crystalline body makes the transition to the liquid state and Vice versa |
| linear shrinkage |
% |
The difference between model dimensions and the model casting |
| the temperature of the casting |
°C |
The temperature of the molten polymer is extruded from the heating cylinder into the mold |