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EN-GJS-500-7, Ductile Cast Iron GGG50

EN-GJS-500-7 is middle grade of ductile cast iron in European standard DIN EN 1563, its equivalent grade in DIN 1693 is GGG50. The followings are its other equivalent grades, its mechanical properties, chemical composition, castings and foundries.

EN-GJS-500-7 Equivalent

This grade is equal to the material grades ISO 500-7, China QT500-7, USA ASTM A536 70-50-05, Japan FCD500, Italy GS500-7, France FGS500-7, India SG500/7, Spain FGE50-7, Belgium FNG50-7, Norway SJK-500.

EN-GJS-500-7 Mechanical Properties

Tensile strength is minimum 500 Mpa.
Yield strength is minimum 320 Mpa.
Elongation is minimum 7%.
Hardness range is Brinell Hardness 170-230.
There is no impact requirement for this grade.

The tensile strength and elongation are the key inspection standard for qualification. Buyers could judge unqualified castings according to these two parameters. Hardness can not be taken as an quality evaluation data unless you have special requirement.

EN-GJS-500-7 Chemical Composition

The normal chemical composition for this grade is as the following:

C: 2.7-3.7.
Si: 0.8-2.9
Mn: 0.3-0.7
P: ≤0.1
S: ≤0.02

The chemical composition has big difference in different standards. All compositions are just for reference. The international standards stipulate that the manufacturers could adjust their chemical composition according to their experience and production conditions, as long as their material could meet the mechanical properties.

Production Foundries

EN-GJS-500-7, or called as cast iron GGG50, is a very common and normal cast iron grade. Most of iron foundries in China could produce this material. So, it is not difficult to find a foundry who could produce it, but just difficult to find one who could produce it very well. In other words, consistent quality is always important.

Main Casting Products

There are many casting products using this grade, such as iron brackets for trucks, tractors, other agricultural and construction machinery. The followings are some casting products manufactured by our foundry.


tractor parts


truck parts


iron brackets for trucks


belt pulley for stone breakers


cradle brackets for trucks


butterfly valve bodies

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