Patent · US Active

Duplex stainless steel

US11692253B2 · kind B2 · utility

1Cited by

0References

12Claims

0Family size

Assignee

Outokumpu Oyj · FI

Inventors

James Oliver · Fjärdhundra, SE
Jan Y. Jonsson · Avesta, SE

Key dates

Filing date	Feb 2, 2015
Grant date	Jul 4, 2023
Priority date	—
Expiry date	Oct 23, 2036

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC22C38/50
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A duplex ferritic austenitic stainless steel having high formability utilizing the TRIP effect and high corrosion resistance with the balanced pitting resistance equivalent is formed with less than 0.04 weight % carbon, 0.2-0.8 weight % silicon, less than 2.0 weight % manganese, 16.5-19.5 weight % chromium, 3.0-4.7 weight % nickel, 1.5-4.0 weight % molybdenum, less than 3.5 weight % tungsten, less than 1 weight % copper, 0.13-0.26 weight % nitrogen, the rest being iron and inevitable impurities occurring in stainless steels.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.