ZT · HJ250G (low manganese, medium silicon and fluorine)
· Compliance: GB / T12470-2003, F48A2-H10Mn2, AWS A5.23, F7A0-EH14
· Description: HJ250G is a smelting low manganese medium silicon and fluorine flux, which is light yellow to light green jade-like particles with a particle size of 2.0-0.45mm (10-40 mesh). Adopting DC power supply, the welding wire is connected to the positive electrode, the welding process has good performance, easy slag removal and beautiful appearance.
· Use: With suitable welding wire, such as H08MnMoA, H08Mn2MoA, H08Mn2MoVA and other low-alloy high strength steels, such as 15MnV, 14MnMoV, 18MnMoNb, etc. With H08Mn2MoVA wire welding -70 ℃ low temperature steel 09Mn2V, it has better low temperature impact toughness.
· Flux composition (%)
| SiO2 | MnO | CaF2 | Al2O3 | MgO | CaO | R2O | FeO | S | P |
| 18～22 | 2～4 | 20～24 | 24～28 | 18～22 | 3～7 | ≤3 | ≤1.5 | ≤0.06 | ≤0.08 |
· Mechanical properties of deposited metal (according to GB / T12470-2003, F48A2-H10Mn2)
| Pilot projects | tensile strength R m (MPa) | Yield StrengthR eh (MPa) | Elongation A (%) | AKV（J） |
| -20℃ | ||||
| guarantee value | 480～660 | ≥400 | ≥22 | ≥27 |
· Precautions:
1. Bake at 300 ℃ ~ 350 ℃ for 2h before welding.
2. The rust, oil, moisture and other impurities must be removed at the welding place.
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