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Description:
FRN-SJ301 is a kind of silicon-calcium-type sintered flux, mesh
10-40(2.0-0.45mm) and basicity -- 1.0-1.1. Either alternating or direct
current can be used, but welding wires must be connected with
the positive electrode when direct current is used. The welding technology
has good performance, fine detachability and fine appearance of weld.
Usage:
The flux is fit for the submerge-arc welding of low-carbon steel and
low-alloy steel, as well as the fast single-way and double-surface welding
of thin steel sheet, and it is usually used for the submerge-arc welding of
liquefied gas storage tanks, gas bottles and pipeline steel.
Cautions:
1.The oil soil, moisture, iron rust and other foreign substances must be removed from the welding joint.
2.The welding flux must be baked under 300-350℃for 2 hours.
3.It's better to use direct current.
Typical Chemical Composition of Weld Metal (%)
| SiO2+TiO2 | Al2O3+MnO | CaO+MgO | CaF2 | S | P |
| 30～40 | 25～30 | 20～30 | 5～13 | ≤0.05 | ≤0.05 |
TypicalMechanical Performance of The Deposited Metal
| Wires | Standard Models | Yield Strength бs (Mpa) | Tensile Strength бb (Mpa) |
Ballistic work (J) |
Specific Elongation δ5 (%) |
| HO8A HO8MnA |
F4A2-HO8A F5A4-HO8MnA |
≥350 ≥410 |
≥420 ≥500 |
≥27(-20℃) ≥27(-40℃) |
≥22% ≥22% |
