Description and Applications HJ257 is a type of fused flux with low-manganese, medium-silicon, medium-fluorine content, brown to black glassy grains. Its grain size is 2.5-0.45mm (8-40 meshes). Flux HJ257 is suitable for use with DC power, filler wires connec with Positive Electrode. With excellent slag removal. Flux for welding of alloy high strength steels (e.g. 15MnV, 14MnMoV, 18MnMoVNb) in combination with appropriate SAW wires such as H08MnMoA, H08Mn2MoA, H08Mn2MoVA, etc. Machanical properties of Deposited Metal
Test Item
Tensile Strength Rm(MPa)
Yield Strength Reh (MPa)
Elongation (A%)
AKV(J)
-20℃
Guaranteed Value
480-660
≥400
≥22
≥27
Packing: 25kg per kraft paper bag or 1000kg per jumbo bag.
Remarks: 1. Redry the flux at 300-350℃ for 2hours before welding. 2. Impurities such as rust, greasy dirt, moisture, ect.should be cleared from the welding area.
