| 摘要 |
<p>Disclosed is a high-strength low-alloy steel with excellent environmental embrittlement resistance in high-pressure hydrogen environments and that can be inexpensively realized. The high-strength low-alloy steel with excellent environmental embrittlement resistance in high-pressure hydrogen environments has a composition containing C: 0.10 to 0.20 % by mass, Si: 0.10 to 0.40 % by mass, Mn: 0.50 to 1.20 % by mass, Ni: 0.75 to 1.75 % by mass, Cr: 0.20 to 0.80 % by mass, Cu: 0.10 to 0.50 % by mass, Mo: 0.10 to 1.00 % by mass, V: 0.01 to 0.10 % by mass, B: 0.0005 to 0.005 % by mass, and N: 0.01 % by mass or less, and further containing one or two of Nb: 0.01 to 0.10 % by mass and Ti: 0.005 to 0.050 % by mass, with the remainder comprising Fe and unavoidable impurities.</p> |
