High strength spring steel

Details High strength spring steel High strength spring steel

1991-06-25

1992-06-02

Yee, Deborah

Alloys or metallic compositions

Ferrous

Chromium containing, but less than 9 percent

148908, C22C 3844, C22C 3848

Patent

active

051184699

ABSTRACT:
Disclosed is a high strength spring steel consisting of, in weight percentage, 0.40 to 0.70% C, 0.50 to 2.00% Si, more than 0.50 to 1.50% Mn, 0.50 to 2.50% Ni, 0.20 to 1.50% Cr, more than 0.60 to 1.50% Mo, 0.01 to 0.50% V, 0.01 to 0.50% Nb, 0.005 to 0.100% Al and the balance being Fe and unavoidable impurities. The steel of the present invention has a high hardness coupled with high toughness and is very useful especially for springs used in suspension devices or other various industrial machines.

REFERENCES:
patent: 4448617 (1984-05-01), Yamamoto et al.
patent: 4544406 (1985-10-01), Yamamoto et al.
patent: 4574016 (1986-03-01), Yamamoto et al.
patent: 4770721 (1988-09-01), Yamamoto et al.
patent: 4842818 (1989-06-01), Kato et al.
patent: 5009843 (1991-04-01), Sugimoto et al.
patent: 47112675 (1987-12-01), Yamamoto et al.
"Sag Resistance of Si-Mo and Si-Cr Spring Steels," SAE Technical Paper Series, F. Borik et al., Society of Automotive Engineers, Inc., pp. 1-8 and title page.

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