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HIGH TENSILE STRENGTH SEAMLESS STEEL PIPE EXCELLENT IN TOUGHNESS, DUCTILITY AND WELDABILITY AND ITS PRODUCING METHOD
HIGH TENSILE STRENGTH SEAMLESS STEEL PIPE EXCELLENT IN TOUGHNESS, DUCTILITY AND WELDABILITY AND ITS PRODUCING METHOD
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机译:具有高韧性,延展性和可焊性的高强度高强无缝钢管及其生产方法
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摘要
PROBLEM TO BE SOLVED: To provide a seamless steel pipe having high tensile strength and excellent also in toughness, ductility and weldability.;SOLUTION: This high tensile strength steel pipe excellent in toughness, ductility and weldability has a composition comprising by mass, 0.10 to 0.40% C, ≤0.8% Si, 0.5 to 1.3% Mn, 0.03 to 0.20% V, ≤0.05% Al, 0.01 to 0.03% M and, if required, Cu, Cr, Mo, Ti, Nb, or the like, and the balance Fe with inevitable impurities, in which Ceq defined by the following formula satisfies the condition of 0.40 to 0.55 and has tensile strength of ≥590 MPa, Charpy absorbed energy at -20°C of ≥30 J and elongation of ≥20%.;COPYRIGHT: (C)2001,JPO
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