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Medical Grade Stainless Steel

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Medical Grade Stainless Steel Materials

Surgical tool materials mainly focus on their corrosion resistance, hardness, toughness and cost-effectiveness, and materials are selected based on their performance.
It is a metal material with iron as the main component, and chromium is mainly added to make the steel corrosion-resistant. A minimum chromium content of about 10% is required, but the addition of other chemical elements, such as nickel, copper or molybdenum, can further enhance corrosion resistance. Stainless steel corrosion can be generalized or localized, which is called pitting corrosion.

There are currently two main materials available for surgical tools:

Precipitation Hardened Stainless Steel

Martensitic Stainless Steel

Precipitation Hardened Stainless Steel

Represented by 17-4ph \ 630, 455465 and RK91 are all in this category

On the basis of chemical composition, different types and quantities of strengthening elements are added, and different types and quantities of carbides, nitrides, carbonitrides, and intermetallic compounds are precipitated through precipitation hardening process, which not only improves the strength of the steel but also maintains sufficient toughness. This is a type of high-strength stainless steel, abbreviated as PH steel.

Advantages: Easy heat treatment and good corrosion resistance

Disadvantages: The hardness is not very high, and the wear resistance performance is average

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Martensitic Stainless Steel

Represented by the 420 series, 420B/J2, 420Mod-X15TN

High C content, high hardness, good toughness and wear resistance, and excellent performance in high-end edge instruments

Advantages: High hardness, good wear resistance, and good toughness

Disadvantages: Poor corrosion resistance and complex heat treatment

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Stainless Steel Material

Stainless Steel for Surgical Instruments

Material	Grade	Common	Specification	Available in
Martensite Stainless Steel	AIS1420A-1.44021	X20Cr13	ASTMF899/ EN70088-3
	AIS1420B-1.4028	X30Cr13	ASTMF899/ EN70088-3
	AISI420C-1.4034	X46Cr13	ASTMF899
	AIS1420Mod-1.4123	X15TN\X40CrMoVN16-2	ASTMF899/ ASTMA276
Precipitation Stainless Steel	AIS1630-7.4542	17-4ph\X5CrNiCuTiNb12-9	ASTMF899EN10088-3/ ASTMA564 AMS564
	C455	Custom455@_X3CrNiCuNb12-9	ASTMF899/ ASTMA564/ AMS5617
	C465	Custom465@_X2CrNiMoAITi12-77-2	ASTMF899/ AMS5936
	13-8Mo	13-8PH	ASTMA564/ AMS5629H
	303/304	X2CrNi9-77 1.4306107	ASTMF899/ ASTMA959
	316L/630	1.4404,1.4435,1.4542	ASTMF899/ ASTMA959

COBERRY is a leading manufacturer & supplier of alloy materials for surgical instruments and medical implants used in medicine.

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