Laser-welded steel pipe and method therefor

Details Laser-welded steel pipe and method therefor Laser-welded steel pipe and method therefor

1999-06-28

2000-10-31

Evans, Geoffrey S.

Electric heating

Metal heating

By arc

148333, 148909, B23K 2600, C22C 3818

Patent

active

061406015

ABSTRACT:
A laser welded steel pipe having a weld zone containing a steel pipe containing 0.01 to 0.2 weight % C, 1 weight % or less S, 0.05 to 2 weight % Mn and 6 weight % or less Mn. The weld zone has a melted and solidified metal structure containing carbon and oxygen which satisfy the following equations:

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patent: 5319179 (1994-06-01), Joecks et al.
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