摘要 |
<p>A high-strength stainless steel having excellent mechanical properties and corrosion resistance in high-pressure hydrogen gas environments is disclosed. A container for high-pressure hydrogen gas made of such a stainless steel is also disclosed. The stainless steel has a chemical composition comprising, in mass %, C: not more than 0.04%, Si: not more than 1.0%, Mn: 7-30%, Cr: 15-22%, Ni: 5-20%, V: 0.001-1.0%, N: 0.20-0.50%, Al: not more than 0.10%, and the balance: Fe and unavoidable impurities including not more than 0.030% of P, not more than 0.005% of S, and respectively not more than 0.01% of Ti, Zr and Hf. The contents of Cr, Mn and N satisfy the following relation: 2.5Cr + 3.4Mn ≦ 300N. A welded joint of a container for high-pressure hydrogen gas or a hardware which is made of this stainless steel is <Bold>characterized in that</Bold> the welded metal satisfies the following relation: -11 ≦ Nieq -1.1 × Creq ≦ -8.</p> |
申请人 |
SUMITOMO METAL INDUSTRIES, LTD. |
发明人 |
IGARASHI, MASAAKI;SEMBA, HIROYUKI;MIYAHARA, MITSUO;OGAWA, KAZUHIRO;OMURA, TOMOHIKO |