440
View AMS Numbers >440C stainless is a high-carbon martensitic stainless steel that is capable of attaining a hardness of approximately 60 HRC. It is commonly used in knives, scissors and surgical tools.
| Component Elements Properties | Percent |
| Carbon | .95 – 1.2% |
| Manganese (maximum) | 1% |
| Silicon (maximum) | 1% |
| Chromium | 16 – 18% |
| Nickel (maximum) | .75% |
| Copper (maximum) | .5% |
| Molybdenum (maximum) | .65% |
| Phosphorus (maximum) | .04% |
| Sulfur (maximum) | .3% |
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