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  ISO 1083 JS 500-7 Ductile Cast Iron  
 

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

 

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