Steel pipe for an airbag system

Details Steel pipe for an airbag system Steel pipe for an airbag system

2005-11-04

2010-06-01

King, Roy (Department: 1793)

Alloys or metallic compositions

Ferrous

Chromium containing, but less than 9 percent

C148S333000, C148S570000

Reexamination Certificate

active

07727463

ABSTRACT:
A high strength steel pipe for an airbag system has a steel composition comprising C: 0.05-0.20%, Si: 0.1-1.0%, P: at most 0.025%, S: at most 0.010%, Cr: 0.05-1.0%, Al: at most 0.10%, at least one of Ti and Mn satisfying (1) Ti≦0.02% and (2) 0.4%≦Mn+40Ti≦1.2%, and a remainder of Fe. The composition may further include one or more of (i) at least one of Mo: 0.05-0.50%, Ni: 0.05-1.5%, V: 0.01-0.2%, and B: 0.0003-0.005%, (ii) at least one of Cu: 0.05-0.5% and Nb: 0.003-0.1%, and (iii) at least one of Ca: 0.0003-0.01%, Mg: 0.0003-0.01%, and REM: 0.0003-0.01%. The steel pipe can be manufactured by forming a pipe from the above-described steel composition to obtain prescribed dimensions, heating to at least the Ac1transformation point and quenching, and then tempering at the Ac1transformation point or below.

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