BrO8S12 (BrOS8-12)

responsible for bearings operating at high pressures


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


Standard Description
OST 24.916.01-71

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