| ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ KAWASAKI STEEL TECHNICAL REPORT No.9 ( March 1984 ) ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ |
| Development of Heavy-wall 2 1/4Cr-1Mo Forgings Kazuo Aso, Hidefumi Tani, Takuichi Imanaka, Shingo Sato, Yoshifumi Nakano, Shinji Sato |
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Synopsis : Generally, a 2 1/4Cr-1Mo steel is used as material for the pressure vessels of oil refining and the like, with requirement for greater thickness, high strength, high toughness, and little embrittlement in operation. With this background, experimental manufacture has been performed of a heavy section 2 1/4Cr-1Mo forged shell ring (t=400mm). To reduce embrittlement susceptibility, a low Si-low P type steel was selected and to give strength even at midsection, high austenitizing temperatures were used. Test results showed high strength and toughness even with greater thickness, as well as little temper embrittlement, hydrogen damage and creep embrittlement. |
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