Stainless Austenitic CrMnCN Steels of Superior Strength Part I: Alloy Design and Properties

Abstract:

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The solubility of nitrogen is high in stainless austenite of steels with 18 mass% of Cr and Mn each, but low in the melt. Carbon reveals the opposite behaviour. Instead of producing high nitrogen steels by pressure metallurgy (PHNS), about 1 mass% of C+N is dissolved in the melt at ambient pressure. The new cost-effective C+N steel reaches a yield strength of 600 MPa, a true fracture strength above 2500 MPa and an elongation above 70 %. Conduction electron spin resonance revealed a high concentration of free electrons. Thus, the ductile metallic character of the C+N steel is enhanced, explaining the high product of strength and toughness.

Info:

Periodical:

Materials Science Forum (Volumes 539-543)

Main Theme:

Edited by:

T. Chandra, K. Tsuzaki, M. Militzer , C. Ravindran

Pages:

4956-4961

DOI:

10.4028/www.scientific.net/MSF.539-543.4956

Citation:

H. Berns et al., "Stainless Austenitic CrMnCN Steels of Superior Strength Part I: Alloy Design and Properties", Materials Science Forum, Vols. 539-543, pp. 4956-4961, 2007

Online since:

March 2007

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$35.00

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