The SG iron Grade GS500-7 in standard UNI 4544, is also known as grade 500-7 (ISO 1083), QT500-7 (GB 1348) and 70-50-05 (ASTM A536).
This material grade is also equal to GGG50 (DIN 1693), EN-GJS-500-7 (EN 1563), FCD 500 (JIS G5502), 500/7 (BS 2789), etc.
Chemical Components of UNI 4544 GS500-7 Ductile Cast Iron
C % |
Si % |
Mn % |
P % |
S % |
Mg % |
Cu % |
3.20-3.60 |
2.30-2.90 |
0.4-0.6 |
0.03-0.06 |
0.02-0.040 |
0.030-0.055 |
<0.4 |
This range can not be taken as the standard of inspection, unless there is special requirement. All foundries could adjust their chemical composition as long as they could meet the mechanical requirements of standards.
The mechanical and physical properties of UNI 4544 GS500-7 ductile cast iron:
Tensile strength |
Rm |
Mpa |
500 |
Yield limit |
Rp0,2 |
Mpa |
320 |
Elongation |
A |
% |
7 |
Hardness |
BHN |
|
170-241 |
Compression strength |
|
Mpa |
800 |
Stress modulus |
E |
Mpa |
169 |
Density |
ρ |
Kg/m3 |
7100 |
Thermal conductivity |
λt |
W.m-1.K-1 |
35,2 |
Brittle failure resistance |
K1c |
MPa.m0,5 |
25 |
Equivalence |
kgf/mm2 |
|
51 |
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.
Main casting products made by UNI 4544 GS500-7 ductile cast iron
There are many casting products using this grade, such as iron brackets for trucks, tractors, other agricultural and construction machinery.
This article is from our Dandong Foundry's UNI 4544 GS500-7 Ductile Cast Iron
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