Steel product excellent in sulfide cracking resistance

Details Steel product excellent in sulfide cracking resistance Steel product excellent in sulfide cracking resistance

1994-03-09

1996-09-17

Scherbel, David

Pipes and tubular conduits

Structure

138140, F16L 1100, F16L 5500

Patent

active

055559166

ABSTRACT:
A steel product, such as a steel pipe for line-pipe, excellent in sulfide cracking resistance sufficient to accept a CAPCIS test. The steel product is manufactured by rolling or forging to have a matrix not including B type inclusions having lengths of 200 .mu.m or more in the longitudinal direction.
Furthermore, the steel pipe is manufactured by rolling or forging to have a matrix not including B type inclusions having dimensions of 200 .mu.m or more in the longitudinal direction within 4 mm of the inner surface.

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patent: 5213637 (1993-05-01), Herrero et al.
patent: 5314549 (1994-05-01), Misao et al.
T. Kushida, et al., "Development of Line Pipe for Sour Service and Full Ring Test Evaluation," The Sumitomo Search, No. 49, pp. 64-75, Apr. 1992.
"Microscopic Testing Method for the Non-Metallic Inclusions in Steel," JIS G 0555, pp. 321-324 (1977).

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