The Japan Steel Works, Ltd.

Japan Steel Works M&e, Inc.

Koichi Takasawa

Yasuhiko Tanaka

Yoru Wada

Rinzo Kayano

Tatsuya Takahashi

Eiji Maeda

Ryoji Ishigaki

Shinya Sato

Takuya Okawa

Takuya Ohkawa

Masato Yoshida

The purpose of the present invention is to enhance the creep characteristics of an Ni-based alloy. The present invention relates to a Ni-based alloy characterized by having a composition containing, in terms of wt %, 15.00-25.00% Cr, 5.00-15.00% Co, 1.00% to less than 12.00% Mo, 1.50-2.50% Ti, 1.00-2.00% Al, 0.20-1.00% Nb, and 0.0010-0.10% C, and in terms of mass ppm, 10-200 ppm P, 30-250 ppm B, and 30-200 ppm N, the remainder comprising Ni and unavoidable impurities.

Ni-based alloy, gas turbine material, and method for manufacturing Ni-based alloy

The present invention relates to an Fe&#x2014;Ni-based alloy having excellent high-temperature characteristics and hydrogen embrittlement resistance, which has a composition containing, in terms of % by mass, C: 0.005% to 0.10%, Si: 0.01% to 0.10%, P: 0.015% or less, S: 0.003% or less, Ni: 23.0% to 27.0%, Cr: 12.0% to 16.0%, Mo: 0.01% or less, Nb: 0.01% or less, W: 2.5% to 6.0%, Al: 1.5% to 2.5%, and Ti: 1.5% to 2.5%, the balance being Fe and other unavoidable impurities.

Fe-Ni-based alloy having excellent high-temperature characteristics and hydrogen embrittlement resistance characteristics, and method for producing the same

An object of the present invention is to provide at a low cost a low-alloy steel having a high strength and excellent high-pressure hydrogen environment embrittlement resistance characteristics under a high-pressure hydrogen environment. The invention is a high-strength low-alloy steel excellent in high-pressure hydrogen environment embrittlement resistance characteristics, which is characterized in that the steel has a composition comprising C: 0.10 to 0.20%, Si: 0.10 to 0.40%, Mn: 0.50 to 1.20%, Cr: 0.20 to 0.80%, Cu: 0.10 to 0.50%, Mo: 0.10 to 1.00%, V: 0.01 to 0.10%, B: 0.0005 to 0.005% and N: 0.01% or less, by mass, with the balance consisting of Fe and unavoidable impurities.

High-strength low-alloy steel excellent in high-pressure hydrogen environment embrittlement resistance characteristics and method for producing the same

Growing community of inventors

Muroran, Japan

Koichi Takasawa