| Nitriding Steels |
| Chemical Composition Ranges and Limits |
| AMS No. |
C |
Mn |
Si |
Cr |
Ni |
Mo |
Al |
Other
Designations |
| 6470 |
.38/.43 |
.45/.75 |
.20/.40 |
1.40/1.80 |
— |
.30/.40 |
.95/1.30 |
135M or #3 |
| 6471 |
.38/.43 |
.50/.80 |
.15/.40 |
.25 max |
1.40/1.80 |
.30/.40 |
.90/1.30 |
Nit #3 |
| 6472* |
.38/.43 |
.50/.70 |
.20/.40 |
1.40/1.80 |
— |
.30/.40 |
.95/1.30 |
— |
| 6475 |
.21/.26 |
.50/.70 |
.20/.40 |
1.00/1.25 |
3.25/3.75 |
.20/.30 |
1.10/1.40 |
N |
* P = .035 max, S = .040 max.
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