Pipe and process for producing a welded and quench hardened stee

Details Pipe and process for producing a welded and quench hardened stee Pipe and process for producing a welded and quench hardened stee

1974-04-08

1976-08-24

Dean, R.

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

148 34, C21D 908

Patent

active

039765202

ABSTRACT:
A method for producing a welded and quench hardened steel pipe and pipe whereby the weld seam running spirally or longitudinally along the pipe length has a lower austenization temperature than the pipe and/or a higher electrical resistance. The ratio of the pipe to seam resistance is preferably greater than one half and the whole of the square of the ratio between pipe wall thickness and mean seam thickness. The seam preferably includes amounts of C, Si, and Mn in the same percentage as the pipe plus nickel between 2-6%.

REFERENCES:
patent: 2060765 (1936-11-01), Welch
patent: 2297878 (1942-10-01), Denneen et al.
patent: 3728782 (1973-04-01), Ziemek

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