A new agglomerated flux for low hydrogen high toughness welds

The main factors affecting the properties of agglomerated flux, such as the basicity of flux, quantity of additive, form of CaO and amounts of CaF₂ and SiO₂, have been studied. The authors have developed a new SJ102 flux which has high basicity and belongs in the CaO-MgO-SiO₂-CaF₂ fluoride-basic type slag system. The SJ102 flux is for low hydrogen and high toughness welds, and is suitable for welding of HSLA steels of σ_b=500~800MPa.