Dual phase stainless steel suitable for use in sour wells

Details Dual phase stainless steel suitable for use in sour wells Dual phase stainless steel suitable for use in sour wells

1983-05-09

1984-12-04

Rutledge, L. Dewayne

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75128A, 75128N, 75128W, C22C 3842

Patent

active

044862318

ABSTRACT:
Disclosed herein is a dual phase stainless steel suitable for use in sour wells. It comprises 0.06-0.20% C, .ltoreq.1.0% Si, 2.5-4% Mn, 20-27% Cr, 5-8% Ni, 2.5-4% Mo, 0.3-2% Cu, 0.1-0.25% N, 40-60% ferrite and the balance Fe and inevitable impurities. It may further contain one or more metals selected from Ti, Nb and V in a total amount of 0.1% to 0.5%. The dual phase stainless steel is excellent in proof strength, tensile strength and elongation and is capable of exhibiting good corrosion resistance in Cl.sup.- --CO.sub.2 --H.sub.2 S environments.

REFERENCES:
patent: 3567434 (1968-03-01), Richardson et al.
patent: 4032367 (1977-06-01), Richardson et al.
patent: 4055448 (1977-10-01), Fujikura et al.

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