Formable thin steel sheets

Details Formable thin steel sheets Formable thin steel sheets

1989-12-12

1991-10-01

Yee, Deborah

Alloys or metallic compositions

Ferrous

Nitrogen containinig

420127, 420121, C22C 3806

Patent

active

050531948

ABSTRACT:
A formable thin steel sheet such as hot rolled sheet, cold rolled sheet or surface treated sheet comprises not more than 0.003 wt. % of C, not more than 1.0 wt % of Si, not more than 1.0 wt % of Mn, not more than 0.15 wt % of P, not more than 0.020 wt % of S, not more than 0.0045 wt % of O, not more than 0.0020 wt % of N, not more than 0.15 wt % of Al provided that a ratio of Al/N is not less than 30, and the balance being Fe and inevitable impurities, and has not only improved formability for press forming, deep drawing or the like but also improved fatigue resistance as a welded joint.

REFERENCES:
patent: 4750952 (1988-06-01), Sato et al.

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