BrO5S25 (BrOS5-25)

sliding Bimetallic bearings


Country Section Category
CIS, Russia, Ukraine Bronze Tin cast bronze

Chemical composition

Standard Fe, % Si, % Sn, % Cu, % Zn, % Sb, % Al, % Pb, % P, %
GOST 613-79 < 0.2 < 0.02 4–6 66.8–73 < 0.5 < 0.5 < 0.02 23–26 < 0.05

Information on suppliers

Physical characteristics

Temperature, °C $$E\cdot 10^{9}$$, $$MPa$$ $$\alpha\cdot 10^{6}$$, $$K^{-1}$$ $$\varkappa$$, $$\frac{W}{m\cdot K}$$
20 68.6 17.6 58.6

Mechanical properties at 20 °C

Rolling Standard Size, mm Tension Classifiers $$\sigma _{U}$$, $$MPa$$ $$\epsilon_L$$, % Treatment
Casting GOST 613-79 in chill mold 137 6 Without termoobrabot.
Casting GOST 613-79 in sandy form 147 5 Without termoobrabot.

Brinell hardness number

Rolling Standard Classifiers Value, HBW
Casting GOST 613-79 in chill mold 60
Casting GOST 613-79 in sandy form 45

Casting and technological parameters

melting point, °C linear shrinkage, % the temperature of the casting, °C
940 1.5 1150

Coefficients of Friction

coefficient of friction with lubrication coefficient of friction without lubrication
0.004 0.14




Standard Description
GOST 613-79

Description of chemical elements

Element Units of measurement Description
Fe % Iron
Si % Silicon
Sn % Tin
Cu % Copper
Zn % Zinc
Sb % Antimony
Al % Aluminium
Pb % Lead
P % Phosphorus

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)
$$\varkappa$$ $$\frac{W}{m\cdot K}$$ Coefficient of thermal conductivity (the heat capacity of the material)

Description of mechanical properties

Parameter Units of measurement Description
$$\sigma _{U}$$ $$MPa$$ Ultimate tensile strength
$$\epsilon_L$$ % Elongation at break (longitudinal)

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