instrument and implant grade metal alloys

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Stainless Steel 431X (1.4057) Medical Alloy

Enhanced version of 431 produced by special powder metallurgy technology which produces a very fine microstructure and homogeneity, resulting in much reduced rejection rates for finished parts. High hardenability makes it ideal for gear and rotating parts (pliers, pincers, dental drills etc) as well as for the most demanding cutting instruments in the medical, surgical and dental industries.


Medical instruments
Surgical instruments
Dental instruments
Cutting instruments

Typical Chemical Composition

C Si Mn P S Cr Ni N Fe
Min 0.12 0.005 15.00 1.50
Max 0.22 1.00 1.0 0.030 0.015 17.00 2.00 0.10 Balance

Typical Mechanical Properties

Condition Tensile (Rm)
Yield (R0.2%)
Hardened & Tempered 45-55


EN X17CrNi16-2
NF S94-090


Stainless Steel 431X (1.4057) Medical Alloy is available in wire and round bar from 0.25mm diameter up to 31.75mm 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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Metal Weight Calculator

Metal Alloy



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