Gerdau MACSTEEL - United States of America, Engineered Carbon and Alloy Steel Bars

Manganese Steels and Manganese Chromium Steels
JIS G 4106
Chemical Composition, %
Steel Grade	C	Si	Mn	P	S	Cr
SMn 420	.17/.23	.15/.35	1.20/1.50	.030 max	.030 max	—
SMn 433	.30/.36	.15/.35	1.20/1.50	.030 max	.030 max	—
SMn 438	.35/.41	.15/.35	1.35/1.65	.030 max	.030 max	—
SMn 443	.40/.46	.15/.35	1.35/1.65	.030 max	.030 max	—
SMnC 420	.17/.23	.15/.35	1.20/1.50	.030 max	.030 max	.35/.70
SMnC 443	.40/.46	.15/.35	1.35/1.65	.030 max	.030 max	.35/.70

NOTE:

As impurities Ni and Cu shall not exceed 0.25% and 0.30%, respectively, for all grades. SMn 420, SMn433, SMn438 and SMn 443 shall not contain Cr exceeding 0.35%.