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 |
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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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