High strength, hot dip coated, dual phase, steel sheet and...

Details High strength, hot dip coated, dual phase, steel sheet and... High strength, hot dip coated, dual phase, steel sheet and...

2006-09-27

2009-10-27

Lorengo, Jerry (Department: 1793)

Metal treatment

Stock

Ferrous

C148S332000, C148S602000, C148S654000, C148S661000

Reexamination Certificate

active

07608155

ABSTRACT:
A galvanized steel sheet having (a) a dual phase microstructure with a martensite phase and a ferrite phase and (b) a composition containing by percent weight: carbon in a range from about 0.01% to about 0.18%; manganese in a range from about 0.2% to about 3%; silicon ≦ about 1.2%; aluminum in a range from about 0.01% to about 0.1%; one or both of chromium and nickel in a range from about 0.1% to about 3.5%; calcium in a range from about 0.0003% to about 0.01%; phosphorus ≦ about 0.01%; sulfur ≦ about 0.03%; nitrogen ≦ about 0.02%; molybdenum ≦ about 1%; copper ≦ about 0.8%; one or more of niobium, titanium, and vanadium ≦ about 1%; and boron ≦ about 0.006% by weight; and with the balance of the composition being iron and incidental ingredients. In one embodiment, the steel sheet is both galvanized and galvannealed.

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European Patent Office Standard Search Report, mailed May 7, 2007.

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