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12MnMoV 钢是在14MnMoV 钢基础上经过适当的成分调整后冶炼的一种新钢种,准备用于制造中高压锅炉无缝钢管。调整后的成分中适当地增加了Si 和V 的含量,以提高钢的抗氧化能力和增强钢的热强性能(Si 由0.2～0.4%增加到0.5～0.8%,V 由0.08～0.16%增加到0.25～0.35%)。为了改善钢的焊接性能和适当提高钢的韧性,Mn和C 的含量稍有减少(Mn 由1.2～1.5减至0.8～1.2%,C 由0.1～0.18%减至0.08～0.15%)。该钢已作为锅炉用高压无缝钢管
12MnMoV steel is a new type of steel that is smelted on the basis of 14MnMoV steel after proper composition adjustment and is intended for the manufacture of medium and high pressure boiler seamless steel tubes. The contents of Si and V were appropriately increased in the adjusted components to improve the oxidation resistance of steel and increase the thermal strength of steel (Si increased from 0.2-0.4% to 0.5-0.8% and V increased from 0.08-0.16% To 0.25 ~ 0.35%). In order to improve the weldability of steel and improve the toughness of steel, the contents of Mn and C decreased slightly (Mn decreased from 1.2-1.5 to 0.8-1.2% and C decreased from 0.1-0.18% to 0.08-0.15%). The steel has been used as boiler high-pressure seamless steel pipe