OK74.70是一款适用于高强度低合金钢焊接的LMA焊条。该焊条非常适用于包括管道焊接在内的各种应用。TypicalTensilePropertiesAsweldedElongationTensileStrengthYieldStrength保护气体StressRelievedTemperatureStressRelievedTestingTime25%650MPa550MPaISO--StressrelievedElongationTensileStrengthYieldStrength保护气体StressRelievedTemperatureStressRelievedTestingTime---AWS620°C1hr夏比V型缺口冲击性能AsweldedImpactValueTestingTemperature保护气体120J-20°CISO90J-40°CISO焊缝金属分析MnMnMoCSi1.5%---MoMnMoCSi-0.45%--CMnMoCSi--0.08%-SiMnMoCSi---0.4%熔敷数据Fusiontimeperelectrodeat90%Imaxkgweldmetal/kgelectrodesNumberofelectrodes/kgweldmetal安培熔敷率电压V直径63sec0.58kg5080-140A1.14kg/h23V3.2x350mm91sec0.61kg2580-140A1.6kg/h23V3.2x450mm93sec0.63kg2490-190A1.66kg/h24V4.0x450mm)