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          Grey Cast Iron Grade SCH20

 
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 )

Linear shrinkage :

1.2   %

 

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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