Title:
RETRACTOR SPIRAL SPRING FOR SEAT BELT
Document Type and Number:
Japanese Patent JP3512136
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an extra thin retractor spiral spring for seat belt, having high strength and excellent in spring characteristic.
SOLUTION: An austenitic stainless steel has a composition consisting of 0.085-0.115% C, 0.75-1.0% Si, 0.6-1.0% Mn, 6.0-7.0% Ni, 16.0-17.0% Cr, 0.025-0.055% N, and the balance iron with inevitable impurities. Further, Md30(°C), represented by Md30(°C)=551-462(C+N)-9.2Si-8.1Mn-29Ni-13.7Cr, is regulated to 40-70.
Inventors:
Murakami, Tomosuke
Application Number:
JP9967896A
Publication Date:
March 29, 2004
Filing Date:
March 29, 1996
Export Citation:
Assignee:
NISSHIN STEEL CO LTD
International Classes:
A62B35/00; C22C38/00; C22C38/40; (IPC1-7): C22C38/00; A62B35/00; C22C38/40
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