ss 2321 / sae 51431 new products

The numerous technical and economical advantages that the powder metallugy (micro-melt) made martensitic CHRONIFER M-15X offers to you? Ist unique reproductibility, reliability, fineness of ist microstructure.

All these features allowed us to offer round bars in the size range of Dia. 2.20mm up to Dia. 18.0mm in a hardened full martensitic pattern on a maximum hardness of 52 - 53 HRC directly from stock.

L. Klein SA offers now on open source basis this premium quality steel as strips material available to all transformers and users.
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New Products SS 2321 / SAE 51431

Availability SS 2321 / SAE 51431
new products SS 2321 / SAE 51431 (X)

SS 2321 / SAE 51431 / Chronifer M-15 X New Products


The stainless hardenable CHRONIFER M-15 X (SS 2321 / SAE 51431 X) is produced with a special powder metallurgic technology. This method achieves a remarkable improvement in the characteristics of the steel.


Properties of the new product SS 2321 / SAE 51431 (X) / M-15 X


Its particularly fine microstructure and homogeneity ensure good machinability, a low material wear and excellent polishing and corrosion resistance. Due to the reduction of the rejection rate in the production of finished parts CHRONIFER M-15 X makes a particularly efficient manufacturing possible.


Applications of SS 2321 / SAE 51431 (X)


Thanks to its excellent hardenability, tenacity, wear resistance and corrosion resistance the M-15 X is used in the watch industry for the production of small movement parts, as well as in the medical industry for the production of instruments and cutting tools and the automotive industry for small precision parts.

Brief description  
Hardenable martensitic stainless Powder Metallurgy steel  
Klein designation: CHRONIFER® M-15 X
Class of steels: Hardenable martensitic stainless steel
Production technology: Micro-Melt®
powder metallurgy
Material number: 1.4057 (X Micro-Melt®)
StandardAISI: 431
Melting: VIM + Micro-Melt®
Machinability: fair to good
Hardening capability: up to 56 HRc
Polishing ability: excellent, very well adapted for mirror polishing
--Magnetism: ferromagnetic
Corrosion resistance: fair to good
Uses: Parts for watch movements and numerous industrials applications
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