| Chromium Molybdenum Steels |
| JIS G 4105 |
| Chemical Composition, % |
| Steel Grade |
C |
Si |
Mn |
P |
S |
Cr |
Mo |
| SCM 415 |
.13/.18 |
.15/.35 |
.60/.85 |
.030 max |
.030 max |
.90/1.20 |
.15/.30 |
| SCM 418 |
.16/.21 |
.15/.35 |
.60/.85 |
.030 max |
.030 max |
.90/1.20 |
.15/.30 |
| SCM 420 |
.18/.23 |
.15/.35 |
.60/.85 |
.030 max |
.030 max |
.90/1.20 |
.15/.30 |
| SCM 421 |
.17/.23 |
.15/.35 |
.70/1.00 |
.030 max |
.030 max |
.90/1.20 |
.15/.30 |
| SCM 430 |
.28/.33 |
.15/.35 |
.60/.85 |
.030 max |
.030 max |
.90/1.20 |
.15/.30 |
| SCM 432 |
.27/.37 |
.15/.35 |
.30/.60 |
.030 max |
.030 max |
1.00/1.50 |
.15/.30 |
| SCM 435 |
.33/.38 |
.15/.35 |
.60/.85 |
.030 max |
.030 max |
.90/1.20 |
.15/.30 |
| SCM 440 |
.38/.43 |
.15/.35 |
.60/.85 |
.030 max |
.030 max |
.90/1.20 |
.15/.30 |
| SCM 445 |
.43/.48 |
.15/.35 |
.60/.85 |
.030 max |
.030 max |
.90/1.20 |
.15/.30 |
| SCM 822 |
.20/.25 |
.15/.35 |
.60/.85 |
.030 max |
.030 max |
.90/1.20 |
.35/.45 |
| NOTE: | As impurities, Ni and Cu shall not exceed 0.25% and 0.30%, respectively, for all grades. |
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