Alloy

Patent metadata

Field	Value
Publication number	US-12378648-B2
Application number	US-202017755689-A
Country	US
Kind code	B2
Filing date	Dec 25, 2020
Priority date	Dec 27, 2019
Publication date	Aug 5, 2025
Grant date	Aug 5, 2025

Abstract

Provided is an alloy having a high strength and a low thermal expansion coefficient. The alloy according to the present disclosure includes a chemical composition containing, in mass %: C: 0.10% or less, Si: 0.50% or less, Mn: 0.15 to 0.60%, P: 0.015% or less, 5: 0.0030% or less, Ni: 30.0 to 40.0%, Cr: 0.50% or less, Mo: 0.50% or less, Co: 0.250% or less, Al: 0.0150% or less, Ca: 0.0050% or less, Mg: 0.0300% or less, N: 0.0100% or less, O: 0.0300% or less, Pb: 0.0040% or less, and Zn: 0.020% or less, one or more elements selected from the group consisting of Nb: 0 to less than 0.145%, Ti: 0 to less than 0.145%, and. V: 0 to less than 0.145%: 0.015 to less than 0.145% in total, with the balance being Fe and impurities, and satisfying Formula (1).

(Nb+3×Ti+V)/(C+N)≤6.00  (1)

First claim

The invention claimed is:

1. An alloy having a chemical composition consisting of: in mass %,
C: 0.02 to 0.10%,
Si: 0.50% or less,
Mn: 0.15 to 0.60%,
P: 0.015% or less,
S: 0.0030% or less,
Ni: 30.0 to 40.0%,
Cr: 0.50% or less,
Mo: 0.50% or less,
Co: 0.250% or less,
Al: 0.0150% or less,
Ca: 0.0050% or less,
Mg: 0.0300% or less,
N: 0.0100% or less,
O: 0.0300% or less,
Pb: 0.0040% or less,
Zn: 0.020% or less,
a total of one or more elements selected from the group consisting of Nb: 0 to less than 0.145%, Ti: 0 to less than 0.145%, and V: 0 to less than 0.145%: 0.015 to less than 0.145%,
Cu: 0 to 0.300%,
Sn: 0 to 0.100%,
W: 0 to 0.200%, and
B: 0 to 0.0040%,
with the balance being Fe and impurities, and
satisfying Formula (1):
(Nb+3×Ti+V)/(C+N)≤5.20  (1)

where symbols of elements in Formula (1) are to be substituted by contents of the elements in the chemical composition of the alloy, in mass %.

2. The alloy according to claim 1 , wherein the chemical composition contains one or more elements selected from the group consisting of Cu: 0 to 0.300%, Sn: 0 to 0.100%, and W: 0 to 0.200% at 0.020% or more in total.

3. The alloy according to claim 2 , the alloy is any one of a tube material, a sheet material, and a bar material.

4. The alloy according to claim 1 , the alloy is any one of a tube material, a sheet material, and a bar material.

Assignees

• Nippon Steel Corp

Inventors

• Takeda Kiyoko
• Otsuka Shunichi

Classifications

• C21D8/02

  during manufacturing of plates or strips (C21D8/12 takes precedence) · CPC title

• C21D8/06

  during manufacturing of rods or wires · CPC title

• C21D8/10

  during manufacturing of tubular bodies · CPC title

• C22C38/14

  containing titanium or zirconium · CPC title

• C22C38/12

  containing tungsten, tantalum, molybdenum, vanadium, or niobium · CPC title