| 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%. |
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