The classification, chemical composition, mechanical properties,
hardness, technological properties，physical
properties，Equivalent steels, specification of grey cast iron
grade SCH20, СЧ20.
Grade: |
SCH20 ( СЧ20 ) |
Classification: |
Gray cast iron |
Chemical composition in % for grade SCH20 (
СЧ20)
C |
Si |
Mn |
S |
P |
3.3-3.5 |
1.4-2.4 |
0.7-1 |
max 0.15 |
max 0.2 |
Mechanical properties under Т=20oС for grade
SCH20 ( СЧ20 )
Assortment |
Dimension |
Direct |
sB |
sT |
d5 |
y |
KCU |
Heat treatment |
- |
mm |
- |
MPa |
MPa |
% |
% |
KJ/m2 |
- |
Casting,GOST1412-85 |
|
|
200 |
|
|
|
|
|
Brinell hardness for SCH20 ( СЧ20
) GOST 1412-85 |
HB 10 -1= 143 - 255 MPa |
Technological properties of the material SCH20 ( СЧ20 )
Physical properties for grade SCH20 ( СЧ20 )
T |
E 10- 5 |
a 10 6 |
l |
r |
C |
R 10 9 |
Grade |
MPa |
1/Grade |
Watt/(m·Grade) |
kg/m3 |
J/(kg·Grade) |
Ohm·m |
20 |
1 |
|
54 |
7100 |
|
|
100 |
|
9.5 |
|
|
480 |
|
Equivalent steels for grade SCH20 ( СЧ20 )
USA |
- |
A48-30B |
Class30B |
No.30 |
Germany |
DIN,WNr |
GG20 |
Japan |
JIS |
FC20 |
FC200 |
|
France |
AFNOR |
Ft20 |
FGL200 |
|
England |
BS |
200 |
220 |
|
Italy |
UNI |
G20 |
Belgium |
NBN |
FGG20 |
Spain |
UNE |
FG20 |
China |
GB |
HT200 |
Sweden |
SS |
0120-00 |
O120 |
|
Poland |
PN |
Z120 |
ZI120 |
|
Czechia |
CSN |
422420 |
Austria |
ONORM |
GG200 |
Inter |
ISO |
200 |
Taiwan |
- |
FC200 |
COPANT |
COPANT |
FG200 |
Specification:
Mechanical properties:
sв - Tensile strength , [MPa]
sT - Yield stress, [MPa]
d5 - Specific elongation at fracture [%]
y - Reduction of area, [%]
KCU - Impact strength, [kJ/ m2]
HB - Brinell hardness, [MPa]
Physical properties:
T - Test temperature, [Grade]
E - Young modulus, [MPa]
a - Coefficient of linear expansion (range 20o - T) , [1/Grade]
l - Termal (heat) condition coefficient, [Watt/(m·Grade)]
r - Density, [kg/m3]
C - Specific heat (range 20o - T), [J/(kg·Grade)]
R - Electrical resistance, [Ohm·m]
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