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1、低合金高强钢焊接时如何正确地选用焊接材料？总的原则是根据等强度的要求，即熔敷金属的强度等级应与母材在同一档次来选用焊接材料，具体选用，见表7。表7 低合金高强钢焊接材料的选用钢 号强度级别（MPa）手弧焊埋 弧 焊电 渣 焊CO2焊焊丝焊条焊剂焊丝焊剂焊丝09Mn209Mn2Si09MnV294E43HJ430HJ431SJ301H08AH08MnAH10MnSiH08Mn2SiH08Mn2SiA16Mn16MnCu14MnNb343E50SJ501薄板：H08A H08MnAHJ431HJ360H08MnMoAH08Mn2SiH08Mn2SiAYJ502-1YJ502-3YJ506-4HJ4
2、31HJ430SJ301中板开坡口对接开I形坡口对接H08MnAH10Mn2HJ350厚板深坡口H10Mn2H08MnMoA15MnV15MnVCu16MnNb392E50E55HJ430HJ431开I形坡口对接H08MnA中板开坡口对接H10Mn2H10MnSiHJ431HJ360H10MnMoH08Mn2MoVAH08Mn2SiH08Mn2SiAHJ250HJ350SJ101厚板深坡口H08MnMoA15MnVN15MnVNCu15MnVTiRe441E55E60SJ431H10Mn2HJ431HJ360H10MnMoH08Mn2MoVAH08Mn2SiH08Mn2SiAHJ350HJ250SJ101H08MnMoAH08Mn2MoA18MnMoNb14MnMoV14MnMoVCu490E60E70HJ250HJ350SJ101H08Mn2MoAH08Mn2MoVAH08Mn2NiMoHJ431HJ360H10Mn2MoAH10Mn2MoVAH10Mn2NiMoAH08Mn2SiMoA
