PROBLEM TO BE SOLVED: To provide an inexpensive oil steel tube having excellent CO2 corrosion resistance and SSCC resistance in severe corrosive environments contg. CO2, Cl- H2S or the like. ;SOLUTION: A steel contg., by mass ≤0.30% C, ≤0.60% Si, 0.30 to 1.50% Mn, ≤0.03% P, ≤0.005% S, 3.0 to 9.0% Cr and 0.01 to 0.10% Al, or further contg. one or two kinds of ≤0.30% Nb and ≤0.50% V by ≥0.03% in total, and the balance Fe with inevitable impurities is subjected to hot rolling into a steel tube, which is thereafter heated to 850 to 1100°C, is cooled at a rate of ≥1°C/s until ≤300°C, and is tempered to ≤800°C.;COPYRIGHT: (C)1999,JPO
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机译：要解决的问题：提供一种廉价的石油钢管，该钢管在严酷的腐蚀环境中具有出色的CO 2 耐腐蚀性和SSCC耐性。 CO 2 ，Cl - H 2 S等。 ;解决方案：以质量计≤0.30％C，≤0.60％Si，0.30至1.50％Mn，≤0.03％P，≤0.005％S，3.0至9.0％Cr和0.01至0.10％Al的钢续Nb≤0.30％，V≤0.50％V中的一种或两种合计≥0.03％，剩余的具有不可避免的杂质的Fe被热轧成钢管，然后被加热到850至1100℃。以≥1°C / s的速度冷却直到≤300°C，并回火到≤800°C .;版权：（C）1999，JPO
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