Method of making ferritic stainless steel sheet having...

Details Method of making ferritic stainless steel sheet having... Method of making ferritic stainless steel sheet having...

2006-06-06

2006-06-06

Yee, Deborah (Department: 1742)

Metal treatment

Process of modifying or maintaining internal physical...

Heating or cooling of solid metal

C148S651000, C148S542000

Reexamination Certificate

active

07056398

ABSTRACT:
A ferritic stainless steel sheet contains abut 0.01 percent by mass or less of carbon; about 1.0 percent by mass or less of silicon; about 1.5 percent by mass or less of manganese; about 11 to about 23 percent by mass of chromium; about 0.06 percent by mass or less of phosphorous; about 0.03 percent by mass or less of sulfur; about 1.0 percent by mass or less of aluminum; about 0.04 percent by mass or less of nitrogen; about 0.0005 to about 0.01 percent by mass of boron; about 0.3 percent by mass or less of vanadium; about 0.8 percent by mass or less of niobium and/or about 1.0 percent by mass or less of titanium wherein 18≦Nb/(C+N)+2(Ti/(C+N))≦60; and the balance being iron and unavoidable impurities. The average crystal grain diameter is about 40 μm or less and the average surface roughness is about 0.3 μm or less.

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M.-Y. Huh et al.,Effect of intermediate annealing on texture, formability and ridging of 17% Cr ferritic stainless steel sheet, Material Science & Engineering A, vol. 308, Jun. 1, 2001, pp. 74-87.

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