440C stainless steel is a high-carbon, magnetic, martensitic stainless, and can be hardened by heat treatment. The high carbon content in 440C provides high hardness and strength. Despite this carbon content, the chromium content is sufficient to retain its stainless characteristics.
SPECIFICATIONS
UNS: S44004
W. Nr.: 1.4125
ASTM: A 276
ASME: SA 276
AMS: 5630, 5880
FEATURES
- Attains the highest hardness of any stainless steel, when heat-treated
- Highest carbon content of 400 series stainless steels
APPLICATIONS
- Valve Seats
- Surgical Instruments
- Bearings
- Bushings
- Nozzles
- Structural Aircraft Parts
COMMON TRADE NAMES
440C
UNS: S44004 / AMS: 5630, 5880