Abstract Disclosed herein is high strength austenitic steel having excellent cold work hardenability, consisting essentially of the following elements: C . . . 0.1-0.3 wt. %; Si . . . up to 1.5 wt. %; Mn . . . 16-22 wt. %; Cr . . . 14-18 wt. %; V . . . 0.8-1.7 wt. %; N . . . 0.3-0.6 wt. %; Ni . . . below 0.8 wt. %; and Fe and inevitable impurities . . . balance, with a proviso that the C-, N- and V-contents satisfy the following inequalities: C+N-(V/10)≧0.4 wt. %; and C+N+V/5≧0.75 wt. %. The above austenitic steel may further contain at least one element selected from the group consisting of 0.05-1.0 wt. % of Ti and 0.05-1.0 wt. % of Nb. The above high strength austenitic steel has an extremely high 0.2% proof stress, exhibits excellent resistance to stress corrosion cracking and good hot workability, and maintains its non-magnetic properties.
Inventors
👤 Koji Kaneko
👤 Yoshihide Fuchino
👤 Tsuyoshi Inoue
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-11-04 21:41
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/38
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
92 words
High strength austenitic steel having excellent cold work hardenability, consisting essentially of the following elements: C . . . 0.1-0.3 wt.%; Si . . . a positive amount and up to 1.5 wt.%; Mn . . . 16-22 wt.%; Cr . . . 14-18 wt.%; V . . . 0.8-1.7 wt.%; N . . . 0.3-0.6 wt.%; Ni . . . less than 0.8 wt.%; and Fe and inevitable impurities . . . balance, with a proviso that the C-, N- and V-contents satisfy the following inequalities: C+N-(V/10)≧0.4 wt.%; and C+N+(V/5)≧0.75 wt.%.
Claim 2
Dependent Claim
92 words
High strength austenitic steel having excellent cold work hardenability, consisting essentially of the following elements: C . . . 0.1-0.3 wt.%; Si . . . a positive amount and up to 1.5 wt.%; Mn . . . 16-22 wt.%; Cr . . . 14-18 wt.%; V . . . 0.8-1.7 wt.%; N . . . 0.3-0.6 wt.%; Ni . . . less than 0.8 wt.%; and Fe and inevitable impurities . . . balance, with a proviso that the C-, N- and V-contents satisfy the following inequalities: C+N-(V/10)≧0.4 wt.%; and C+N+(V/5)≧0.75 wt.%.
Claim 3
Dependent Claim
102 words
High strength austenitic steel having excellent cold work hardenability, consisting essentially of the following elements: C . . . 0.1-0.3 wt.%; Si . . . up to 1.5 wt.%; Mn . . . 16-22 wt.%; Cr . . . 14-18 wt.%; V . . . 0.8-1.7 wt.%; N . . . 0.3-0.6 wt.%; Ni . . . less than 0.8 wt.%; at least one of Ti and Nb . . . 0.05-1.0 wt.% (each); and Fe and inevitable impurities . . . balance, with a proviso that the C-, N- and V-contents satisfy the following in equalities: C+N-(V/10)≧0.4 wt.%; and C+N+(V/5)≧0.75 wt.%.
Claim 4
Dependent Claim
102 words
High strength austenitic steel having excellent cold work hardenability, consisting essentially of the following elements: C . . . 0.1-0.3 wt.%; Si . . . up to 1.5 wt.%; Mn . . . 16-22 wt.%; Cr . . . 14-18 wt.%; V . . . 0.8-1.7 wt.%; N . . . 0.3-0.6 wt.%; Ni . . . less than 0.8 wt.%; at least one of Ti and Nb . . . 0.05-1.0 wt.% (each); and Fe and inevitable impurities . . . balance, with a proviso that the C-, N- and V-contents satisfy the following in equalities: C+N-(V/10)≧0.4 wt.%; and C+N+(V/5)≧0.75 wt.%.
Claim 5
Dependent Claim
23 words
The high strength austenitic steel as claimed in claim 1 or 2, having a 0.2% proof stress of 130 kgf/mm 2 or higher.