The teigu electrode and the submerged arc welding stick which consist of the welding consumable and the said material for high Cr ferritic heat resisting steel, the wire for welding and covered electrode

摘要

PROBLEM TO BE SOLVED: To provide a welding material, with which the sound welding part is obtd. while keeping the high temp. strength corresponding to 9.Cr-2.W steel and the welding of pressure resistant parts of a boiler tube, piping and devices usable in the steam condition of 600C, such as an extra supper critical power plant is suitably executed. ;SOLUTION: The welding material for high ferritic base heat resistant steel has the chemical components contained by wt.% of 0.01-0.12 C, 0.25-0.50 Si, 0.10-0.30 Mn, 8.0-9.5 Cr, 0.30-0.50 Mo, 1.50-2.00 W, 0.15-0.25 V, 0.04-0.09 Nb, 0.001-0.006 B, 0.030-0.050 N, 0.40-0.60 Ni, 0.25-1.50 Co, 0.04 Al and in the case the above chemical components except Cr, C and Co become the average value in each range, the Cr, C and Co are to satisfy the formula 14Cr-220C-7 Co100.;COPYRIGHT: (C)2000,JPO