instrument and implant grade metal alloys

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Stainless Steel 440B (1.4112) Medical Alloy

440B is a hardenable martensitic stainless steel, with low Sulphur content and produced by ESR. This alloy meets the requirement of medical instruments and dental cutting tools such as bone drills, knives and cutlery, punch disks, ball bearings, screw extruders and spray nozzles. It fulfills most parameters of ASTM F-899 (only the Mo content higher than F-899, but this higher content increases the corrosion resistance).


Medical instruments
Surgical instruments
Dental instruments
Cutting instruments

Typical Chemical Composition

C Si Mn P S Cr Mo Ni V Nb N Fe
Min 0.85 17.00 0.90 0.07
Max 0.95 1.00 1.00 0.040 0.015 19.00 1.30 0.12 Balance

Typical Mechanical Properties

Condition Tensile (Rm)
Yield (R0.2%)
Annealed 925 265HB Max
Hardened 58


ISO 7153-1 (R)
EN X90CrMoV18
DIN X90CrMoV18
NF S94-090


Stainless Steel 440B (1.4112) Medical Alloy is available in wire and round bar from 0.90mm diameter up to 45.0mm 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.

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NOTE: Weights calculated are theoretical. Manufacturing tolerances should be allowed for and results adjusted accordingly.