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  ISO 1083 JS 400-18 Ductile Cast Iron  
 

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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