OK73.68为一款2.5%镍合金化LMA焊条，适合用于焊接温度低至-60°C条件下具有冲击强度要求的低合金钢。焊缝金属成分相当优异，在立向上焊时仍可获得低温冲击性能。OK73.68的焊缝金属还具有优良的耐海水和耐***烟雾性能。TypicalTensilePropertiesAsweldedElongationTensileStrengthYieldStrength保护气体StressRelievedTemperatureStressRelievedTestingTime28%615MPa540MPaISO--StressrelievedElongationTensileStrengthYieldStrength保护气体StressRelievedTemperatureStressRelievedTestingTime28%600MPa500MPaAWS620°C1hr夏比V型缺口冲击性能AsweldedImpactValueTestingTemperature保护气体StressRelievedTestingTempStressRelievedTestingTime105J-60°CISO--65J-80°CISO--StressrelievedImpactValueTestingTemperature保护气体StressRelievedTestingTempStressRelievedTestingTime85J-60°CAWS620°C1hr焊缝金属分析MnMnMoCSiNiCr1%-----MoMnMoCSiNiCr-0.01%----CMnMoCSiNiCr--0.05%---SiMnMoCSiNiCr---0.35%--NiMnMoCSiNiCr----2.4%-CrMnMoCSiNiCr-----0.02%熔敷数据Fusiontimeperelectrodeat90%Imaxkgweldmetal/kgelectrodesNumberofelectrodes/kgweldmetal安培熔敷率电压V直径55sec0.62kg70.070-110A0.90kg/h23V2.5x350mm81sec0.62kg32.0105-150A1.40kg/h23V3.2x450mm88sec0.65kg21.0140-190A2.00kg/h23V4.0x450mm104sec0.65kg13.5190-270A2.50kg/h27V5.0x450mm)