Hot-rolled microalloyed steel and its use in variable-thickness

Details Hot-rolled microalloyed steel and its use in variable-thickness Hot-rolled microalloyed steel and its use in variable-thickness

1990-10-16

1992-03-31

Yee, Deborah

Alloys or metallic compositions

Ferrous

1.5 percent or more manganese containing, but less than 8...

420127, 420128, 148320, C22C 3812

Patent

active

051006138

ABSTRACT:
A vanadium-nitrogen microalloyed steel is continuously hot rolled to C-shaped sections that meet property requirements for side rails of truck frames with no heat treatment. Sections with different thicknesses of the web and flange regions can also be prepared by the same processing. The composition of the steel is from about 0.16 to about 0.20 percent carbon, from about 1.2 to about 2.0 percent manganese, from about 0.45 to about 0.55 percent silicon, from about 0.10 to about 0.30 percent vanadium, from about 0.001 to about 0.030 percent aluminum, from about 0.010 to about 0.027 percent nitrogen, less than about 0.030 percent phosphorus, less than about 0.030 percent sulfur, balance iron totalling 100 percent, with all percentages by weight. Variations of this steel containing either from about 0.01 to about 0.02 percent titanium or 0.04 to about 0.07 percent aluminum are also permissible.

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