instrument and implant grade metal alloys

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Stainless Steel 420B (1.4028) Medical Alloy

Stainless Steel 420B is an ESR remelted martensitic steel with a low Sulphur content and a higher Carbon content than that of 420A. This grade can be hardended by quenching, including a secondary sub-zero quench which, along with fine polishing and passivating, emparts it with its best corrosion resistance to water and steam. It is well adapted for the production fo all medical instruments.


Medical instruments
Surgical instruments
Dental instruments

Typical Chemical Composition

C Si Mn P S Cr Ni Fe
Min 0.26 12.00
Max 0.35 1.00 1.00 0.040 0.03 14.00 1.00 Balance

Typical Mechanical Properties

Condition Tensile (Rm)
Yield (R0.2%)
Heat Treated 700-1000 47


ISO 7153-1 ©
EN X30Cr13
DIN X30Cr13
NF 94-090


Stainless Steel 420B (1.4028) Medical Alloy is available in wire and round bar from 0.80mm diameter up to 30.00mm 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.