BrAZh9-4

Gears, bushings, valve seats in the aircraft industry, in mechanical engineering castings massive parts in the ground

Classification

Country Section Category
CIS, Russia, Ukraine Bronze Pressureless bronze plated

Chemical composition

Standard Fe, % Si, % Sn, % Mn, % Cu, % Zn, % Al, % Pb, % P, %
GOST 18175-78 2–4 < 0.1 < 0.1 < 0.5 84.3–90 < 1 8–10 < 0.01 < 0.01

Information on suppliers

Physical characteristics

Temperature, °C $$E\cdot 10^{9}$$, $$MPa$$ $$\alpha\cdot 10^{6}$$, $$K^{-1}$$ $$\varkappa$$, $$\frac{W}{m\cdot K}$$ $$\rho$$, $$\frac{kg}{m^3}$$ $$c\cdot 10^{-3}$$, $$\frac{J}{kg\cdot K}$$ $$R\cdot 10^{-6}$$, $$\Omega\cdot m$$
20 116 58 7500 0.12
100 16.2 0.423

Mechanical properties at 20 °C

Rolling Standard Size, mm Tension Classifiers $$\sigma _{U}$$, $$MPa$$ $$\epsilon_L$$, % Treatment
Round compacting 540 15
Alloy soft 400–500 35–45
Alloy solid 500–700 4–6

Brinell hardness number

Rolling Standard Classifiers Value, HBW
Round compacting 110–180
Alloy soft 100–120
Alloy solid 160–200

Casting and technological parameters

melting point, °C
1040

Coefficients of Friction

coefficient of friction with lubrication coefficient of friction without lubrication
0.004 0.18

Analogues

USA Germany
C61900 CuAl9Fe3Mn2

Standards

Standard Description
GOST 18175-78
GOST 1628-78

Description of chemical elements

Element Units of measurement Description
Fe % Iron
Si % Silicon
Sn % Tin
Mn % Manganese
Cu % Copper
Zn % Zinc
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)
$$\rho$$ $$\frac{kg}{m^3}$$ The density of the material
$$c\cdot 10^{-3}$$ $$\frac{J}{kg\cdot K}$$ The specific heat of the material (range 20°C–T)
$$R\cdot 10^{-6}$$ $$\Omega\cdot m$$ Electrical resistivity

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