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  JIS G5501 FC250 Gray Cast Iron  
 

JIS G5501 FC250 gray iron material grade, including its application, mechanical properties, chemical composition, and Equivalent Grade.

Typical Application of JIS G5501 FC250 gray iron casting:
Anvils, automobile and diesel cylinder blocks, compressors, cylinder heads, cylinder liners, face plates, heavy flywheels, heavy machine beds, impellers, medium-duty brake drums and clutch plates, pistons, pumps, steam pressure castings, valves and wheels.

Properties of JIS G5501 FC250 Gray Cast Iron:

General
Density ρ 6.8 - 7.8 g/cm³ at 20 °C Typical for Cast Iron

Mechanical
Elastic modulus E 92.4 GPa at 20 °C Typical for Grey Cast Iron
Hardness, Brinell HB 241 [-] at 20 °C
Poisson's ratio ν 0.21 [-] at 20 °C Typical for Grey Cast Iron
Shear modulus G 41 GPa at 20 °C Typical for Cast Iron
Tensile strength Rm 155 - 250 MPa at 20 °C
0.01 % Proof Stress 73 MPa
0.10 % Proof Stress 169 MPa
Total strain at failure 0.57%
Elastic strain at failure 0.20%
Total minus elastic strain at failure 0.37%

Thermal
Coefficient of thermal expansion α 1.1E-5 - 1.5E-5 1/K at 20 °C Typical for Grey Cast Iron
Specific heat capacity cp 460 J/(kgK) at 20 °C Typical for Grey Cast Iron
Thermal conductivity λ 20 - 80 W/(mK) at 20 °C Typical for Grey Cast Iron

Chemical composition in % for JIS G5501 FC250 gray cast iron

C

Si

Mn

S

P

3.2 - 3.4

1.4 - 2.2

0.7 - 1

max 0.15

max 0.2

As for normal grey iron, the chemical composition is not important comparatively. The iron foundries could adjust the compositions according to their experience as long as they could meet the physical and mechanical requirements.

Bending resistant properties and hardness of JIS G5501 FC250 gray cast iron

Grade

Grade of the old type

Bending resistant properties

Hardness
HBS

All up weight
/N

Deflection
f / mm

FC250

FC25

10000

5.0

241

Equivalent Grade of JIS G5501 FC250 gray cast iron

Country

Standard

Material Grade


ISO

ISO 185

GRADE 250


China

GB 9439

HT250


USA

ASTM A48

CLASS 35


Germany / Austria

DIN 1691

GG25


European

EN 1561

EN-GJL-250


Italy

UNI 5007

G25


France

NF A32-101

FGL250


UK

BS 1452

250, 260


Spain

UNF

FG25


Belgium

NBN 830-01

FGG25


Australia

AS 1830

T250, T260


Sweden

SS 14 01

O125


Norway

NS11 100

SJG250


 

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