STAINLESS STEEL FOR HIGH PRESSURE HYDROGEN GAS, VESSEL AND EQUIPMENT COMPRISING THE STEEL

Title:

STAINLESS STEEL FOR HIGH PRESSURE HYDROGEN GAS, VESSEL AND EQUIPMENT COMPRISING THE STEEL

Document Type and Number:

WIPO Patent Application WO/2004/083476

Kind Code:

A1

Abstract:

A stainless steel for a high pressure hydrogen gas, characterized in that it has a chemical composition, in mass %: C: 0.02 % or less, Si: 1.0 % or less, Mn: 3 to 30 %, Cr: more than 22 % and up to 30 %, Ni: 17 to 30 %, V: 0.001 to 1.0 %, N: 0.10 to 0.50 %, Al: 0.10 % or less, and the balance: Fe and impurities, with the proviso that the impurities contains, based on 100 mass % of the steel, 0.030 % or less of P, 0.005 % or less of S, and 0.010 % or less of each of Ti, Zr and Hf, and the contents of Cr, Mn and N satisfy the following formula (1): 5Cr + 3.4Mn ≤ 500N (1); the above stainless steel, which further comprises one or more of Mo, W, Nb, Ta, B, Cu, Co, Mg, Ca, Ce, Y, Sm, Pr and Nd; and a vessel and other devices for a high pressure hydrogen gas manufactured with the stainless steel. The stainless steel for a high pressure hydrogen gas exhibits excellent mechanical properties and corrosion resistance under the circumstance of a high pressure hydrogen gas, and also is excellent in the resistance to stress corrosion cracking.

Inventors:

IGARASHI MASAAKI (JP)
SEMBA HIROYUKI (JP)
MIYAHARA MITSUO (JP)
OGAWA KAZUHIRO (JP)
OMURA TOMOHIKO (JP)

Application Number:

PCT/JP2004/003797

Publication Date:

September 30, 2004

Filing Date:

March 19, 2004

Export Citation:

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Assignee:

SUMITOMO METAL IND (JP)
IGARASHI MASAAKI (JP)
SEMBA HIROYUKI (JP)
MIYAHARA MITSUO (JP)
OGAWA KAZUHIRO (JP)
OMURA TOMOHIKO (JP)

International Classes:

B23K35/30; C22C38/00; C22C38/18; C22C38/46; C22C38/58; (IPC1-7): C22C38/00; C22C38/58; B23K35/30

Foreign References:

JPH07188863A	1995-07-25
JP2003222299A	2003-08-08
JP2003269695A	2003-09-25
EP0416313A1	1991-03-13
US4302247A	1981-11-24

Other References: