SCM430,4130 Material comparison table

* SCM430,4130 Material comparison table

(Chromium molybdenum steels)

 

1. Chemical composition

Code	KS	JIS	AISI
Material Grade	SCM430	SCM430	4130
C	0.28~0.33	0.28~0.33	0.28~0.33
Si	0.15~0.35	0.15~0.35	0.15~0.30
Mn	0.60~0.85	0.60~0.85	0.40~0.60
P	≦0.030	≦0.030	≦0.035
S	≦0.030	≦0.030	≦0.040
Ni	<0.25	<0.25	-
Cr	0.90~1.20	0.90~1.20	0.80~1.10
Mo	0.15~0.30	0.15~0.30	0.15~0.25
Cu	<0.30	<0.30	-
Remark	-	-	In AISI 3 C 0.17~0.34 Mn 0.35~0.60 Cr 0.80~1.15

(Referred to KS, JIS, AISI)

 

2. Mechanical property (SCM430)

Heat Treatment	yield point kgf/mm^2 (N/mm^2)	tensile strength kgf/mm^2 (N/mm^2)	elongation %	contraction of area %	hardness (HB)	charpy impact value kgf.m/cm^2 (J/cm^2)
Quenching 830~880℃ Oil cooling Tempering 530~630℃ Quick cooling	70≦ (686)≦	85≦ (834)≦	18≦	55≦	241~302	11≦ (108)≦

(Referred to KS, JIS)