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1.4472 / UNS S31675

The 1.4472 steel, enhanced through Pressure Electroslag Remelting (PESR), boasts a notably high nitrogen level while maintaining minimal sulfur and carbon levels. It is enriched with chromium and manganese, along with a modest amount of niobium. Its Pitting Resistance Equivalent Number (PREN) averages at 35.8, surpassing the 28.9 of the conventional 1.4441 variant, signifying superior resistance to pitting corrosion. This alloy is devoid of delta ferrite and remains non-magnetic even under extensive cold working. The material's high durability, however, does make machining more challenging, necessitating adjustments in cutting parameters and equipment.

ISO 5832-9 / ASTM F1586

With its exceptional corrosion and mechanical strength, along with impressive fatigue durability, this steel is highly favored for a wide array of medical uses, particularly in orthopedic surgery for internal fixation tools and prosthetics, among other medical and surgical tools. Its consistent mechanical properties also render it an ideal choice for precision micro-mechanical components.

Material Identifier: 1.4472
International Standard: ISO 5832-9
European Standard: EN 10088-3 as of September 2005, specified as X4CrNiMnMo 21-9-4
German Standard: DIN X4CrNiMnMo 21-9-4
American Standard: ASTM F 1586
French Standard: NF S 94-090
Unified Numbering System (UNS): S31675