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  BS 2789 400/17 Ductile Cast Iron  
 

BS2789 Grade 400/17 is a normal grade of ductile iron for UK. Typical applications include dies, pistons, valves and molds.

This grade is suitable for applications where the electrical conductivity, optimal impact, fatigue and magnetic permeability features of a spheroidal graphite iron (SG iron) is required.

Chemical Composition of BS 2789 400/17 ductile cast iron:
There is no specified chemical composition in the BS 2789 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. The normal chemical composition for this grade is as the following:

Carbon

3.40-3.85%

Phosphorous

0.10% max

Manganese

0.10-0.30%

Sulphur

0.02% max

Silicon

2.30-3.10%

Magnesium

0.07% max

Iron

balance

Mechanical Properties of BS 2789 400/17 ductile cast iron:

Grade

Tensile strength
σb≥/Mpa

Yield strength
σ0.2≥/Mpa

Elongation
δ≥
%

Hardness
HBS

Matrix structure
parameter

400/17

400

250

17

≤179

ferrite

Equivalent Grades for BS 2789 400/17 ductile cast iron:

Country

Standard

Material Grade

ISO

ISO 1083

GRADE 400-15/GRADE 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/GRADE 400-12

Sweden

SS 14 07

0717-02

Norway

NS11 301

SJK-400.3/SJK-400

 

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