Patent ID: 6361624
Filing Date: 2002-03-26
Classification: C21D,C22C

Abstract:
A method for producing a fully stabilized porcelain enameling steel, said method comprising:a) hot rolling a steel slab to strip in coil form, said slab having a composition consisting essentially of in weight percent: 0.005max. C,0.35max. Mn0.015max. P0.015max. S0.015max. Si0.025to 0.055 Al0.006to 0.015 N0.03to 0.06 â€‚Ti0.02to 0.05 â€‚Cbupto 0.03 â€‚Sbthe balance Fe andinevitable impurities;b) cold rolling the hot rolled strip substantially to final thickness with a minimum cold reduction of at least 65 percent; and c) box annealing the cold rolled strip in coil form in a protective atmosphere until a cold spot temperature of the coil reaches a temperature within the range of 610 to 705 degrees C. (1135 to 1300 degrees F.).