AUSTENITIC STAINLESS STEEL WITH IMPROVED HIGH TEMPERATURE SOFTENING RESISTANCE

Title:

AUSTENITIC STAINLESS STEEL WITH IMPROVED HIGH TEMPERATURE SOFTENING RESISTANCE

Document Type and Number:

WIPO Patent Application WO/2022/131504

Kind Code:

A1

Abstract:

Disclosed is an austenitic stainless steel with improved high temperature softening resistance. According to the present invention, the stainless steel comprises, in weight%, C: 0.02-0.15%, N: 0.1-0.3%, Si: 0.2-0.7, Mn: 2.0-5.0%, Cr: 17.0-19.0%, Ni: 2.5-5.0%, Cu: 1.0-3.0%, and the balance being Fe and inevitable impurities and satisfies formula (1). Formula (1): -30≤ 551-462*(C+N)-9.2*Si-8.1*Mn-13.7*Cr-29*(Ni+Cu) ≤30, wherein C, N, Si, Mn, Cr, Ni, and Cu denote weight% of the respective elements.

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Inventors:

LEE JAE-HWA (KR)
LEE MUN-SOO (KR)
JO GYUJIN (KR)

Application Number:

PCT/KR2021/014158

Publication Date:

June 23, 2022

Filing Date:

October 14, 2021

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Assignee:

POSCO (KR)

International Classes:

C22C38/58; C21D8/00; C22C38/42

Foreign References:

KR20120083930A	2012-07-26
JP5308726B2	2013-10-09
KR20100011989A	2010-02-03
CN103924163A	2014-07-16
JP2017145460A	2017-08-24

Attorney, Agent or Firm:

SELIM INTELLECTUAL PROPERTY LAW FIRM (KR)

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