Stainless steel multifold pipe

Details Stainless steel multifold pipe Stainless steel multifold pipe

1993-10-29

1995-10-17

Scherbel, David

Pipes and tubular conduits

Distinct layers

Coated

138143, 138140, 138172, 138DIG6, F16L 914

Patent

active

054581567

ABSTRACT:
A multifold pipe made by multiple rolling up and turning of a copper coated steel sheet into a multifold pipe, characterized in that said steel sheet is a cold rolled sheet of a super soft austenitic stainless steel comprising by weight: up to 0.05% of C, up to 1.0% of Si, up to 5.0% of Mn, from 9.0% to 15.0% of Ni, from 15.0% to 20.0% of Cr, up to 0.04% of N, up to 5.0% of Cu, the balance being Fe and unavoidable impurities, wherein the alloying elements are further adjusted so that both the two relations (1) and (2) noted below are satisfied:

REFERENCES:
patent: 3957086 (1976-05-01), Gondek
patent: 4102677 (1978-07-01), Deverell
patent: 4141762 (1979-02-01), Yamaguchi et al.
patent: 4312902 (1982-01-01), Murase et al.
patent: 4505946 (1985-03-01), Suzuki et al.
patent: 4999159 (1991-03-01), Uematsu et al.
patent: 5297587 (1994-03-01), Johnson

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