Title:
PRECIPITATION HARDENABLE AUSTENITIC STEEL
Document Type and Number:
WIPO Patent Application WO2003056053
Kind Code:
B1
Abstract:
The present invention relates to a stainless steel alloy, more precisely a highstrength stainless, precipitation hardenable, austenitic, stainless alloy, containing a well adjusted amount of aluminium and a high silicon content and which has the following composition (in weight-%): C 0-0.07 Si 0.5-3.0 N 0-0.1 Cr 15.0-20.0 Ni 7.0-12.0 Al 0.25-1.5 Cu 0 <= Cu <= 4.0 Mn 0-3.0 Mo 0-2.0 Ti 0-1.0 and the balance Fe together with normally occuring impurities and additives and a product that is reduced by cold working, especially drawing, without intermediate heat treatment, the strength of which increases by final heat treatment at 300 °C to 500 °C by not less than 14 %, that shows a Md30-value of between -55 and -100, a loss of force that is smaller than 3.0 % at 1400 N during 24 h and which is very suitable for use in spring applications, such as springs of round wire and strip steel and in medical applications, such as surgical and dental instruments.
Inventors:
ZETTERHOLM GUSTAF (SE)
HOLMBERG HAAKAN (SE)
HOLMBERG HAAKAN (SE)
Application Number:
PCT/SE2002/002300
Publication Date:
April 08, 2004
Filing Date:
December 11, 2002
Export Citation:
Assignee:
SANDVIK AB (SE)
ZETTERHOLM GUSTAF (SE)
HOLMBERG HAAKAN (SE)
ZETTERHOLM GUSTAF (SE)
HOLMBERG HAAKAN (SE)
International Classes:
C21D9/00; C21D8/02; C21D9/02; C21D9/52; C22C38/00; C22C38/02; C22C38/04; C22C38/06; C22C38/34; C22C38/42; C22C38/58; (IPC1-7): C22C38/42
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