High Nitrogen Steels. The Corrosion Resistance of Nitrogen Bearing Martensitic Stainless Steels.

We produced low carbon and high nitrogen martensitic stainless steels that contain less than 0.1 mass% C and more than 0.45 mass% N, through the pressurized induction melting process, in which nitrogen is introduced from a pressurized N2 atmosphere. The hardness and corrosion resistance of these steels were investigated under various heat treatment conditions. The hardness of these steels after spheroidal annealing treatment is approximately 95HRB and the cold workability is superior to that of AISI440C. The hardness of these steels after quenching and sub-zero treatment is from 53 to 56HRC. In the tempering process, however, high nitrogen steels show secondary hardening at approximately 4 points in HRC compared with the quenched hardness after subzero treatment and have the maximum tempered hardness of 56 to 60HRC around 723K. The corrosion resistance of quenched and tempered materials under 723K is better than AISI304 evaluated by the pitting potential in 3.5% NaCl aqueous solution. Both remnant Cr2N in hardening and precipitated Cr2N in tempering degraded the corrosion resistance of high nitrogen martensitic stainless steels. The best balanced developed steel has a hardness of 60HRC and better corrosion resistance than AISI304 under optimal heat treatment conditions.

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High Nitrogen Steels. Sensitization Behaviour and Corrosion Resistance of Austenitic Stainless Steels Alloyed with Nitrogen and Manganese.

ISIJ International ◽

10.2355/isijinternational.36.818 ◽

1996 ◽

Vol 36 (7) ◽

pp. 818-824 ◽

Cited By ~ 20

Author(s):

R. F. A. Jargelius-Pettersson

Keyword(s):

Corrosion Resistance ◽

Stainless Steels ◽

Austenitic Stainless Steels ◽

High Nitrogen ◽

Nitrogen Steels

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Influence of Nitrogen and Carbon Contents on Quenched and Tempered Hardness and Corrosion Resistance of High Nitrogen Martensitic Stainless Steels

DENKI-SEIKO ◽

10.4262/denkiseiko.79.187 ◽

2008 ◽

Vol 79 (3) ◽

pp. 187-196

Author(s):

Shuji Narita ◽

Shigeki Ueta ◽

Tetsuya Shimizu

Keyword(s):

Corrosion Resistance ◽

Stainless Steels ◽

High Nitrogen ◽

Martensitic Stainless Steels

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High Nitrogen Steels. Nitrogen Bearing Martensitic Stainless Steels: Microstructure and Properties.

ISIJ International ◽

10.2355/isijinternational.36.840 ◽

1996 ◽

Vol 36 (7) ◽

pp. 840-845 ◽

Cited By ~ 18

Author(s):

M. B. Horovitz ◽

F. Beneduce Neto ◽

A. Garbogini ◽

A. P. Tschiptschin

Keyword(s):

Stainless Steels ◽

High Nitrogen ◽

Microstructure And Properties ◽

Martensitic Stainless Steels ◽

Nitrogen Steels

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CRUCIBLE 174 SXR

Alloy Digest ◽

10.31399/asm.ad.ss1034 ◽

2009 ◽

Vol 58 (5) ◽

Keyword(s):

Fracture Toughness ◽

Stainless Steel ◽

Corrosion Resistance ◽

Austenitic Stainless Steel ◽

Stainless Steels ◽

Precipitation Hardening ◽

High Strength ◽

Heat Treating ◽

Martensitic Stainless Steels ◽

Excellent Corrosion Resistance

Abstract Crucible 174 SXR is a premium-quality precipitation-hardening stainless steel designed for use as rifle barrels. It is a modification of Crucible’s 17Cr-4Ni that offers substantially improved machinability without sacrificing toughness. Its excellent corrosion resistance approaches that of a 300 series austenitic stainless steel, while its high strength is characteristic of 400 series martensitic stainless steels. At similar hardness levels, Crucible 174 SXR offers greater toughness than either the 410 or 416 stainless steels which are commonly used for rifle barrels. This datasheet provides information on composition, physical properties, hardness, and elasticity as well as fracture toughness. It also includes information on forming and heat treating. Filing Code: SS-1034. Producer or source: Crucible Service Centers.

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