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  UNI 4544 GS500-7 Ductile Cast Iron  
 

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.

 

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