SJG250 is a high material grade of grey cast iron in Norway standard NS11 100, it is also named as cast iron GG25 in standard DIN 1691 by Germany and Austria.
The followings are the chemical composition, general properties, mechanical properties, thermal properties and electrical properties for GG25 gray cast iron, which should be equal to SJG250 in standard NS11 100.
The chemical composition for NS11 100 SJG250 Gray Cast Iron:
C |
Si |
Mn |
S |
P |
3.00 - 3.25 |
1.85 - 2.10 |
0.40 – 0.70 |
max 0.12 |
max 0.25 |
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.
Properties for NS11 100 SJG250 Gray Cast Iron:
General
Property |
Temperature |
Value |
Density |
20.0 °C |
7.2 g/cm³ |
Mechanical
Property |
Temperature |
Value |
Comment |
Elastic modulus |
20.0 °C |
103 - 118 GPa |
|
Hardness, Brinell |
20.0 °C |
250 - 285 [-] |
|
Plane-Strain Fracture Toughness |
20.0 °C |
15.2 MPa·√m |
|
Poisson's ratio |
20.0 °C |
0.26 [-] |
|
Shear modulus |
23.0 °C |
41 GPa |
Typical for Cast Iron |
Tensile strength |
20.0 °C |
155 - 350 MPa |
|
Thermal
Property |
Temperature |
Value |
Comment |
Melting point |
|
1120 °C |
Typical for Cast Iron |
Specific heat capacity |
200.0 °C |
460 J/(kg·K) |
|
600.0 °C |
535 J/(kg·K) |
|
Thermal conductivity |
23.0 °C |
55 W/(m·K) |
Typical for Cast Iron |
Electrical
Property |
Temperature |
Value |
Electrical resistivity |
20.0 °C |
7.3E-7 Ω·m |
Worldwide equivalents of grade SJG250 (Norway: NS11 100)
Norway
NS |
EU
EN |
USA
- |
Germany
DIN,WNr |
Japan
JIS |
France
AFNOR |
England
BS |
Belgium
NBN |
Spain
UNE |
SJG250 |
EN-GJL-250 (EN-JL1040) |
250/275
35
35B
40
40B |
0.6025
GG25 |
FC250 |
FGL250
Ft25D |
250
260
Grade220
Grade260 |
FGG25 |
FG25 |
China
GB |
Sweden
SS |
Bulgaria
BDS |
Hungary
MSZ |
Poland
PN |
Romania
STAS |
Austria
ONORM |
Australia
AS |
HT25-47
HT250 |
01-25-00
0125 |
Vch25 |
OV25 |
Z125 |
FC250 |
GG25 |
T260 |
Russia
GOST |
Inter
ISO |
India
IS |
Netherlands
NEN |
Denmark
DS |
Taiwan
- |
Luxembourg
- |
Italy
UNI |
COPANT
- |
SCH25 |
250
JL250 |
FG260 |
GG25 |
GG30 |
FC250 |
FGG25 |
G25 |
FG250 |
|
