Electric-resistance-welded steel pipe with high strength

Details Electric-resistance-welded steel pipe with high strength Electric-resistance-welded steel pipe with high strength

1991-12-24

1994-02-15

Yee, Deborah

Metal treatment

Stock

Ferrous

148909, 138177, C22C 3802, C22C 3812

Patent

active

052863093

ABSTRACT:
An electric-resistance-welded steel pipe with high strength. The pipe consists essentially of (a) 0.05 to 0.30 wt. % C, (b) 0.6 to 2.0 wt. % Mn, (c) 0.03 to 0.70 wt. % Si, (d) (i) 0.5 wt. % or less Mo by itself or (ii) 0.5 wt. % or less Mo with 1.2 wt. % or less Cr or (iii) 0.5 wt. % or less Mo with 0.1 wt. % or less V or (iv) 0.1 wt. % or less V and (e) the balance being Fe and inevitable impurities. The steel pipe has a martensitic phase in an amount of 60 to 100% and has a tensile strength of 120 to 170 kgf/mm.sup.2. The steel pipe is useful as an impact bar for the inside of an automobile door.

REFERENCES:
patent: 4210467 (1980-07-01), Klatzer et al.
patent: 4740255 (1988-04-01), Manton
patent: 4799971 (1989-01-01), McDougall et al.
Patent Abstracts of Japan, vol. 9, No. 77, Apr. 6, 1985, of JP-A-59 206183, Nov. 1984.
Patent Abstracts of Japan, vol. 9, No. 282, Nov. 9, 1985, of JP-A-60 124483, Jul. 1985.

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