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440C (1.4215) martensitic stainless steel is heat treatable to attain the highest levels of strength, hardness and wear resistance of all of the stainless steels. It has a higher carbon content than 440A and 440B giving it these characteristics, but at the expense of slightly reduced corrosion resistance. Typically used in applications such as bearings and rollers, its high hardness make it ideal for all types of surgical cutting instruments.
Applications
Medical instruments
Surgical instruments
Dental instruments
Cutting instruments
Typical Chemical Composition
| C | Si | Mn | P | S | Cr | Mo | Fe | |
| Min | 0.95 | 16.00 | 0.40 | |||||
| Max | 1.20 | 1.00 | 1.00 | 0.04 | 0.03 | 18.00 | 0.75 | Balance |
Heat Treatment
Treatment : 1925 °F ± 25 (1052 °C ± 14), held at heat for 30 minutes ± 3, and quenched in oil.
Optional : Sub-zero cooling to -100 °F ± 20 (-73 °C ± 11), holding at that temperature for 2 hours ± 0.25, and warming in air to room temperature
Typical Mechanical Properties
| Condition | Tensile (Rm) KSI |
Yield (R0.2%) KSI |
Hardness HRC |
||||
| Annealed | 130 Max | 255HB Max | |||||
| Heat Treated | 58 Min | ||||||
Specifications
1.4125
EN X105CrMo17
AFNOR X105CrMo17
ASTM F899
ASTM A959
NF S94-090
UNS S44004
AMS 5630
AMS 5618 Vac Melt
Availability
Stainless Steel 440C (1.4215) Medical Alloy is available in wire and round bar from 0.90mm diameter up to 52.0mm diameter
Disclaimer : Every effort is made to ensure that technical specifications are accurate. However, technical specifications included herein should be used as a guideline only. All specifications are subject to change without notice.
