E109
MPa
α106
K1
ϰ
WmK
ρ
kgm3
c103
JkgK
σU
MPa

SCh20

for the manufacture of castings

Classification

Country Section Category
CIS, Russia, Ukraine Cast iron Gray cast iron

Chemical composition

Standard Fe, % Si, % Mn, % P, % C, % S, %
GOST 1412-85 92.75–94.6 1.4–2.4 0.7–1 < 0.2 3.3–3.5 < 0.15

Information on suppliers

Physical characteristics

Temperature, °C E\cdot 10^{9}E109, MPaMPa \alpha\cdot 10^{6}α106, K^{-1}K1 \varkappaϰ, \frac{W}{m\cdot K}WmK \rhoρ, \frac{kg}{m^3}kgm3 c\cdot 10^{-3}c103, \frac{J}{kg\cdot K}JkgK
20 100 54 7100
100 9.5 0.48

Mechanical properties at 20 °C

Rolling Standard Size, mm Tension Classifiers \sigma _{U}σU, MPaMPa Treatment
Casting GOST 1412-85 200

Brinell hardness number

Rolling Standard Classifiers Value, HBW
GOST 1412-85 143–255

Casting and technological parameters

linear shrinkage, %
1.2

Analogues

Germany USA
GG20 A48-30B
Class30B
No.30

Standards

Standard Description
GOST 1412-85

Description of chemical elements

Element Units of measurement Description
Fe % Iron
Si % Silicon
Mn % Manganese
P % Phosphorus
C % Carbon
S % Sulfur

Description of physical characteristics

Parameter Units of measurement Description
E\cdot 10^{9}E109 MPaMPa Elastic modulus
\alpha\cdot 10^{6}α106 K^{-1}K1 Coefficient of thermal (linear) expansion (range 20°C–T)
\varkappaϰ \frac{W}{m\cdot K}WmK Coefficient of thermal conductivity (the heat capacity of the material)
\rhoρ \frac{kg}{m^3}kgm3 The density of the material
c\cdot 10^{-3}c103 \frac{J}{kg\cdot K}JkgK The specific heat of the material (range 20°C–T)

Description of mechanical properties

Parameter Units of measurement Description
\sigma _{U}σU MPaMPa Ultimate tensile strength

Description of the casting and technological parameters

Parameter Units of measurement Description
linear shrinkage % The difference between model dimensions and the model casting