CHVG30

general machinery parts working at high cyclic mechanical stress; ICE parts operating at high temperatures and variable mechanical loading

Classification

Country Section Category
CIS, Russia, Ukraine Cast iron Vermicular Graphite Cast Iron

Chemical composition

Standard Fe, % Si, % Mg, % Mn, % Cr, % РЗЭ, % P, % C, % S, %
GOST 28394-89 92.117–93.985 2.2–3 0.015–0.028 0.2–0.6 < 0.15 0.1–0.2 < 0.08 3.5–3.8 < 0.025

Information on suppliers

Physical characteristics

Temperature, °C $$E\cdot 10^{9}$$, $$MPa$$ $$\alpha\cdot 10^{6}$$, $$K^{-1}$$ $$\varkappa$$, $$\frac{W}{m\cdot K}$$ $$\rho$$, $$\frac{kg}{m^3}$$
20 135 50 7000
100 13

Mechanical properties at 20 °C

Rolling Standard Size, mm Tension Classifiers $$\sigma _{U}$$, $$MPa$$ $$\sigma_{P}$$, $$MPa$$ $$\epsilon_L$$, % Treatment
Castings GOST 28394-89 300 240 3

Brinell hardness number

Rolling Standard Classifiers Value, HBW
Alloy GOST 28394-89 130–180

Standards

Standard Description
GOST 28394-89

Description of chemical elements

Element Units of measurement Description
Fe % Iron
Si % Silicon
Mg % Magnesium
Mn % Manganese
Cr % Chrome
РЗЭ % Rare earth elements
P % Phosphorus
C % Carbon
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)
$$\varkappa$$ $$\frac{W}{m\cdot K}$$ Coefficient of thermal conductivity (the heat capacity of the material)
$$\rho$$ $$\frac{kg}{m^3}$$ The density of the material

Description of mechanical properties

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