Manganese Steel JIS G 4106

JIS G 4106 : Manganese Steel and Manganese Chromium Steels for Machine Structural Use

Jenis Material	Chemical Composition %
	C	Si	Mn	P Max.	S Max.	Cr
SMn 420	0.17∼0.23	0.15∼0.35	1.20∼1.50	0.030	0.030	–
SMn 433	0.30∼0.36	0.15∼0.35	1.20∼1.50	0.030	0.030	–
SMn 438	0.35∼0.41	0.15∼0.35	1.35∼1.65	0.030	0.030	–
SMn 443	0.40∼0.46	0.15∼0.35	1.35∼1.65	0.030	0.030	–
SMn C 420	0.17∼0.23	0.15∼0.35	1.20∼1.50	0.030	0.030	0.35∼0.70
SMn C 443	0.40∼0.46	0.15∼0.35	1.35∼1.60	0.030	0.030	0.35∼0.70

Note : As impurities, Ni 0.25 Cu 0.30% shall not be exceeded for each class.
Neither Cr 0.35% shall not be exceeded for SMn 433, SMn 438, SMn 443 and SMn 420.