ISO 1083 JS 500-7 is a nodular iron with a mostly pearlitic and smaller amount of ferrite microstructure.
The nodular iron with this material grade has mechanical properties comparable to low alloy steels.
Chemistry requirements are not specified in the ISO 1083 standard. The iron foundries could adjust the chemical components according to their experience and production conditions, as long as they could meet the mechanical properties.
Main Chemistry Composition of ISO 1083/JS/500-7 |
Reference analysis for medium wall thicknesses |
C |
Si |
Mn |
Microstructure |
3.50 – 3.70 |
2.30 – 2.60 |
0.40 max |
Ferrite and Pearlite |
ISO 1083/JS/500-7 ductile cast iron has the characteristics of good mechanical strength and good mechanical stability, so it is normally used to produce general mechanics, manhole covers, gear cases, hydraulics, etc.
The followings are the mechanical properties, physical properties and technological properties of ISO 1083/JS/500-7 ductile cast iron:
Mechanical Properties1) of ISO 1083/JS/500-7 |
Tensile strength |
Rm |
MPa |
500 |
0.2 yield strength |
Rp0.2 |
MPa |
320 |
Elongation at fracture |
A5 |
% |
7 |
Elastic modulus |
E |
GPa |
169 |
Brinell hardness |
BHN |
|
170-230 |
Fatigue limit2) |
|
MPa |
224 |
Fatigue limit3) |
|
MPa |
134 |
1) The mechanical properties of cast iron with spheroidal graphite in integrally cast Y-shaped test specimens (minimum values)
2) Wöhler rotating bending fatigue test, unnotched test specimen
3) Wöhler rotating bending fatigue test, notched test specimen |
Physical Propertiesof ISO 1083/JS/500-7 |
Density |
ρ |
kg/dm3 |
7.10 |
Thermal conductivity |
λ at 300 °C |
W/(K*m) |
35.2 |
Thermal expansion coefficient |
α up to 400 °C |
10-6/K |
12.5 |
Technological Properties of ISO 1083/JS/500-7 |
Usage temperature |
<500 |
Machinability |
Good |
Wear resistance |
Good |
Induction or flame-hardening capacity |
Low |
Nitriding capacity |
Good |
Weldability |
Only weldable using special electrodes |
Equivalent Grades of ISO 1083/JS/500-7 ductile cast iron:
Country |
Standard |
Material Grade |
ISO |
ISO 1083 |
GRADE 500-7 |
China |
GB 1348 |
QT500-7 |
USA |
ASTM A536 |
70-50-05 |
Germany/Austria |
DIN 1693 |
GGG50 |
European |
EN 1563 |
EN-GJS-500-7 |
Japan |
JIS G5502 |
FCD500 |
Italy |
UNI 4544 |
GS500-7 |
France |
NF A32-201 |
FGS500-7 |
UK |
BS 2789 |
500/7 |
Spain |
UNF |
FGE50-7 |
Belgium |
NBN 830-02 |
FNG50-7 |
Australia |
AS 1831 |
GRADE 500-7 |
Sweden |
SS 14 07 |
0727-02 |
Norway |
NS11 301 |
SJK-500 |
|
