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

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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)