About products
9Cr18Mo2 steel is a high-quality stainless steel in China, equivalent to 440B, containing 0.9%
carbon and 18% chromium. Its high hardness, approximately 58-60 HRC, and excellent corrosion
resistance make it an ideal choice for surgical blades, stainless steel knives, and cutlery.
Compared to other blade steels, the high carbon content as well as sufficient additions of chromium,
vanadium, and molybdenum contribute to better edge retention of this steel. In addition to edge retention
and durability, this steel also boasts high corrosion resistance. Common applications include blades,
surgical instruments, cutlery, and various other items.
Chemical Composition(%)
| C |
Si |
Mn |
Cr |
P |
S |
| 0.75~0.85 |
≤0.40 |
≤0.40 |
3.20~3.80 |
≤0.03 |
≤0.03 |
Hardness:
Typically hardened to a Rockwell hardness of around 58-60 HRC (Rockwell C scale), indicating
excellent hardness suitable for cutting applications.
Martensitic Structure:
It belongs to the martensitic stainless steel family, characterized by a microstructure composed
primarily of martensite, a hard, brittle phase.
Edge Retention:
Thanks to its high carbon content and alloying elements like chromium, vanadium, and
molybdenum, 9Cr18Mo2 steel offers superior edge retention compared to many other
types of stainless steel.
Corrosion Resistance:
The significant chromium content provides excellent resistance to
corrosion, making it suitable for use in environments where exposure to moisture or corrosive
substances is common.
Applications:
Widely used in the manufacturing of various cutting tools such as knives, blades, and surgical
instruments due to its combination of hardness, edge retention, and corrosion resistance. It is
also utilized in the production of high-quality kitchen cutlery and other utensils.
Heat Treatment:
Typically subjected to heat treatment processes such as quenching and tempering to achieve
the desired balance of hardness, toughness, and corrosion resistance.
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