Metal treatment – Stock – Ferrous
Reexamination Certificate
2011-04-12
2011-04-12
King, Roy (Department: 1733)
Metal treatment
Stock
Ferrous
C420S060000, C148S648000
Reexamination Certificate
active
07922837
ABSTRACT:
The present invention relates to a steel sheet for Vitreous enameling excellent in enameling properties (bubbling and black spot resistance, enamel adhesiveness and fish scale resistance) and workability, and a method for producing the same, and is characterized in that the steel sheet contains, in mass of, C: 0.010% or less, Mn: 0.03 to 1.3%, Si: 0.03% or less, Al: 0.02% or less, N: 0.0055% or less, P: below 0.035%, and S: over 0.025% to 0.08%; and the density change of the steel sheet from before an annealing to after an annealing at 850° C. for 20 hours, in a hydrogen atmosphere is 0.02% or more.
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Murakami Hidekuni
Nishimura Satoshi
Sanagi Shiro
Kenyon & Kenyon LLP
King Roy
Nippon Steel Corporation
Roe Jessee R.
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