低合金焊丝品名类别AWS型号典型化学成分，%特点和用途CMnSiCrNiMo低合金钢焊丝Techalloy80S-B2ER80S-B20.090.550.481.350.551.25Cr-0.5Mo钢焊接Techalloy80S-B6ER80S-B60.070.440.365.450.555CrMo钢焊接Techalloy80S-B8ER80S-B80.080.450.349.151.059CrMo钢焊接Techalloy90S-B9ER90S-B90.110.600.199.00.50.95P91(T91)钢焊接Techalloy110S-1ER110S-10.071.550.450.32.300.42σS680Mpa,Ak87J(-51℃)Techalloy120S-1ER120S-10.081.50.450.352.550.50σs730Mpa,Ak80J(-51℃))