Method of making as-pierced tubular products

Details Method of making as-pierced tubular products Method of making as-pierced tubular products

1981-06-30

1983-01-25

Skiff, Peter K.

Metal treatment

Compositions

Heat treating

148 36, C21D 810

Patent

active

043701787

ABSTRACT:
Process of making as-pierced tubular steel casing having a yield strength of 80-110 ksi, a minimum tensile strength of 100 ksi, and a minimum elongation of 121/2% in two inches. The steel is stengthened by precipitation of vanadium carbides, including carbonitrides, and has a ferrite-pearlite microstructure with a ferrite grain size of about ASTM 7 or finer.

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