低合金耐热钢药芯焊丝类别品名AWS型号熔敷金属化学成分(%)熔敷金属力学性能特征与用途CSiMnPSCrMoσ0.2(MPa)δb(MPa)δ(%)Akv(J)药芯焊丝DWA-81B2E81T1-B2M0.050.550.970.0060.0121.340.4957565525-18℃:67适于焊接ASTMA387Gr.11,Gr.12钢和类似钢神,与DW-81B2相比,DWA-81B2冲击功较高DWA-91B3E91T1-B3M0.070.350.850.0070.0102.291.0061570521-18℃:96适于焊接ASTMA387Gr.22钢和类似钢种,与DW-91B3相比,DWA-91B3的冲击功较高)