BrA9Zh4

It is used in mechanical engineering and aircraft industry

Classification

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

Chemical composition

Standard Fe, % Cu, % Al, %
GOST 18175-78 2–4 83.3–90 8–10

Information on suppliers

Physical characteristics

Temperature, °C $$E\cdot 10^{9}$$, $$MPa$$ $$\alpha\cdot 10^{6}$$, $$K^{-1}$$ $$\varkappa$$, $$\frac{W}{m\cdot K}$$ $$\rho$$, $$\frac{kg}{m^3}$$ $$R\cdot 10^{-6}$$, $$\Omega\cdot m$$
20 110.7 58.6 7600 0.123
100 16.32

Mechanical properties at 20 °C

Rolling Standard Size, mm Tension Classifiers $$\sigma _{U}$$, $$MPa$$ $$\sigma_{P}$$, $$MPa$$ $$\psi$$, % $$KCU\cdot 10^{3}$$, $$\frac{J}{m^2}$$ Treatment
Alloy 390 196 30 588

Brinell hardness number

Rolling Standard Classifiers Value, HBW
Alloy 98

Casting and technological parameters

melting point, °C linear shrinkage, %
1040 2.49

Coefficients of Friction

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

Standards

Standard Description
GOST 18175-78

Description of chemical elements

Element Units of measurement Description
Fe % Iron
Cu % Copper
Al % Aluminium

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
$$R\cdot 10^{-6}$$ $$\Omega\cdot m$$ Electrical resistivity

Description of mechanical properties

Parameter Units of measurement Description
$$\sigma _{U}$$ $$MPa$$ Ultimate tensile strength
$$\sigma_{P}$$ $$MPa$$ Proportionality limit
$$\psi$$ % Reduction in cross section on fracture
$$KCU\cdot 10^{3}$$ $$\frac{J}{m^2}$$ 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