SUBMERGED ARC WELDING WIRE FOR HIGH STRENGTH 2.25CR 1MO V STEEL AND WELD METAL

摘要

The purpose of the present invention is to provide: a submerged arc welding wire for high strength 2.25Cr 1Mo V steel said submerged arc welding wire being capable of improving creep rupture strength without deteriorating toughness temper embrittlement characteristics SR cracking resistance and welding workability; and a weld metal. This welding wire is characterized by containing 0.11 to 0.18 mass% of C 0.05 to 0.35 mass% of Si 1.00 to 1.40 mass% of Mn up to 0.015 mass% of P up to 0.015 mass% of S up to 0.07 mass% of Ni up to 0.07 mass% of Co 2.00 to 2.30 mass% of Cr 0.90 to 1.20 mass% of Mo up to 0.025 mass% of Ti up to 0.025 mass% of Al 0.33 to 0.43 mass% of V 0.015 to 0.030 mass% of Nb up to 0.05 mass% of W and up to 0.0005 mass% of B with the balance being Fe and unavoidable impurities.