SCM435,4135,4137,708A37,34CrMo4 Material comparison table

* SCM435,4135,4137,708A37,34CrMo4 Material comparison table

(Chromium molybdenum steels)

 

1. Chemical composition

Code	KS	JIS	AISI	AISI	BS	DIN
Material Grade	SCM435	SCM435	4135	4137	708A37	34CrMo4
C	0.33~0.38	0.33~0.38	0.32~0.39	0.35~0.40	0.35~0.40	0.30~0.37
Si	0.15~0.35	0.15~0.35	0.15~0.30	0.15~0.30	0.10~0.35	0.15~0.40
Mn	0.60~0.85	0.60~0.85	0.65~0.95	0.70~0.90	0.70~1.00	0.50~0.80
P	≦0.030	≦0.030	≦0.035	≦0.035	-	≦0.035
S	≦0.030	≦0.030	≦0.040	≦0.040	-	≦0.035
Ni	<0.25	<0.25	-	-	-	-
Cr	0.90~1.20	0.90~1.20	0.80~1.15	0.80~1.10	0.90~1.20	0.90~1.20
Mo	0.15~0.30	0.15~0.30	0.15~0.25	0.15~0.25	0.15~0.25	0.15~0.30
Cu	<0.30	<0.30	-	-	-	-
Remark	-	-	-	In AISI 3 C0.33~0.40 Mn0.65~0.95 Cr0.80~1.15	-	-

(Referred to KS, JIS, AISI, BS, DIN)

 

2. Mechanical property (SCM435)

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	80≦ (785)≦	95≦ (932)≦	15≦	50≦	269~331	8≦ (78)≦

(Referred to KS, JIS)