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Grade 400-18 is a good ductile cast iron material grades in ISO standard ISO 1083, which is equivalent to the following grades:
Country |
Standard |
Material Grade |
ISO |
ISO 1083 |
GRADE 400-15, 400-18 |
China |
GB 1348 |
QT400-18 |
USA |
ASTM A536 |
60-40-18 |
Germany/Austria |
DIN 1693 |
GGG40 |
European |
EN 1563 |
EN-GJS-400-15,EN-GJS-400-18 |
Japan |
JIS G5502 |
FCD400 |
Italy |
UNI 4544 |
GS370-17 |
France |
NF A32-201 |
FGS370-17 |
UK |
BS 2789 |
400/17 |
Spain |
UNF |
FGE38-17 |
Belgium |
NBN 830-02 |
FNG38-17 |
Australia |
AS 1831 |
GRADE 370-17, 400-12 |
Sweden |
SS 14 07 |
0717-02 |
Norway |
NS11 301 |
SJK-400.3, SJK-400 |
Main Chemistry Composition of ISO 1083/JS/400-18 |
Reference analysis for medium wall thicknesses |
C |
Si |
Mn |
Microstructure |
3.50 – 3.70 |
2.30 – 2.60 |
0.25 max |
Ferrite |
As for normal ductile 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.
ISO 1083/JS/400-18 ductile cast iron has the characteristics of good strength, very high ductility and good machinability.
The followings are the mechanical properties, physical properties and technological properties of ISO 1083/JS/400-18 ductile cast iron:
Mechanical Properties1) of ISO 1083/JS/400-18 |
Tensile strength |
Rm |
MPa |
400 |
0.2 yield strength |
Rp0.2 |
MPa |
240 |
Elongation at fracture |
A5 |
% |
18 |
Elastic modulus |
E |
GPa |
169 |
Notched bar impact work2) |
at +23 °C (RT) |
Joules |
14 |
|
at -20 °C (LT) |
Joules |
12 |
|
at -40 °C (LT) |
Joules |
- |
Brinell hardness |
BHN |
|
130-175 |
Fatigue limit3) |
|
MPa |
195 |
Fatigue limit4) |
|
MPa |
122 |
1) The mechanical properties of cast iron with spheroidal graphite in integrally cast Y-shaped test specimens (minimum values)
2) Mean value of three ISO-V test specimens (DIN 50115)
3) Wöhler rotating bending fatigue test, unnotched test specimen
4) Wöhler rotating bending fatigue test, notched test specimen |
Physical Propertiesof ISO 1083/JS/400-18 |
Density |
ρ |
kg/dm3 |
7.10 |
Thermal conductivity |
λ at 300 °C |
W/(K*m) |
36.2 |
Thermal expansion coefficient |
α up to 400 °C |
10-6/K |
12.5 |
Technological Properties of ISO 1083/JS/400-18 |
Usage temperature |
<500 |
Machinability |
Excellent |
Wear resistance |
Low |
Induction or flame-hardening capacity |
Low |
Nitriding capacity |
Good |
Weldability |
Only weldable using special electrodes |
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