High performance alloy for corrosion resistance

Patent metadata

Field	Value
Publication number	US-12138674-B2
Application number	US-202318342454-A
Country	US
Kind code	B2
Filing date	Jun 27, 2023
Priority date	Mar 18, 2021
Publication date	Nov 12, 2024
Grant date	Nov 12, 2024

Abstract

A corrosion resistant alloy suitable for use as a seamless tubular is described. The corrosion resistant alloy includes 13-15 wt. % chromium, 5-7 wt. % nickel, and 2.5-4.5 wt. % molybdenum. The balance of the corrosion resistant alloy is iron.

First claim

What is claimed is:

1. A corrosion resistant alloy consisting essentially of:
0.01-0.02 wt % carbon;
0.05-0.1 wt. % niobium;
13-15 wt. % chromium;
5-7 wt. % nickel;
2.5-4.5 wt. % molybdenum;
less than 0.01 wt. % N; and
an amount of iron to bring the composition to 100 wt. %.

2. The corrosion resistant alloy of claim 1 , comprising a pitting resistance equivalent number (PREN) of 21.4-30.

Assignees

• Saudi Arabian Oil Co

Inventors

• Owoeye Oladele
• Waluyo Fauzia Rahman Eko

Classifications

• C22C38/105

  containing Co and Ni · CPC title

• C21C5/562

  starting from scrap · CPC title

• C21C5/5211

  in an alternating current [AC] electric arc furnace · CPC title

• C21C7/0025

  Adding carbon material · CPC title

• C21C7/0006

  Adding metallic additives · CPC title