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Title:
MANUFACTURE OF RESISTANCE WELDED OIL WELL PIPE HIGH IN YOUNG'S MODULUS IN THE CIRCUMFERENTIAL DIRECTION OF STEEL PIPE AND EXCELLENT IN CRUSHING PROPERTY
Document Type and Number:
Japanese Patent JPH04254520
Kind Code:
A
Abstract:

PURPOSE: To offer a method for manufacturing a resistance welded oil well pipe high in the Young's modulus in the circumferential direction of the steel pipe and excellent in crushing properties.

CONSTITUTION: This is a method for manufacturing a resistance welded oil well pipe high in the Young's modulus in the circumferential direction of a steel pipe and excellent in crushing properties having features that, at the time of subjecting a slab to hot rolling, the cumulative draft of the steel in the temp. range of [the Ar3 point +50°C] or below to the Ar1 point to 3 to 10% to the thickness of the initial slab and the sizing reduction of area at the time of manufacturing a resistance welded steel pipe is regulated to 2 to 30%.


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Inventors:
KOYUMIBA MOTOFUMI
KONNO NAOKI
SUZUKI NORIAKI
OBATA MASAAKI
Application Number:
JP1347091A
Publication Date:
September 09, 1992
Filing Date:
February 04, 1991
Export Citation:
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Assignee:
NIPPON STEEL CORP
International Classes:
B21B3/00; B21B19/00; B21B19/10; B21C37/30; C21D8/10; C22C38/00; C22C38/04; (IPC1-7): B21B3/00; B21B19/00; B21C37/30; C21D8/10; C22C38/00; C22C38/04
Domestic Patent References:
JPS5623223A1981-03-05
JPS542970A1979-01-10
Attorney, Agent or Firm:
Kazuo Ozeki



 
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