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KS D4302 1994 Standard for Nodular Iron

This standard is for stipulating the physical properties of nodular iron, which is also called as ductile iron. This is a Korea standard, but this standard was similar with the other standards for nodular iron such as ASTM A536 in USA and GB T1348 in China. The following is the main content of KS D4302-1994 for your reference.

Grade and mechanical properties of nodular cast iron
Grade
Grade of the old type
Tensile strength
σb≥/Mpa
Yield strength
σ0.2≥/Mpa
Elongation
δ≥(%)
AKV≥ / J
Hardness
HBS
Average value
Individual value
GCD 370
GCD 37
370
230
17
13
11
≤179
GCD 400
GCD 40
400
240
12
≤201
GCD 450
GCD 45
450
280
10
143~217
GCD 500
GCD 50
500
340
7
170~241
GCD 600
GCD 60
600
370
3
192~269
GCD 700
GCD 70
700
420
2
229~302
GCD 800
GCD 80
800
480
2
248~352
 
Chemical analysis of kinds of nodular cast iron(mass fraction)(%)
Grade
Grade of the old type
C
Si
Mn
P
S
GCD 370
GCD 37
≥2.5
≤2.5
≤0.4
0.08
0.02
GCD 400
GCD 40
≥2.5
0.02
GCD 450
GCD 45
≥2.5
0.02
GCD 500
GCD 50
≥2.5
0.02
GCD 600
GCD 60
≥2.5
0.02
GCD 700
GCD 70
≥2.5
0.02
GCD 800
GCD 80
≥2.5
0.02

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