Submerged ARC Welding (SAW) Flux

SJ301 is a kind of silicon-calcium-type sintered flux, with the mesh of 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 steels, as well as the fast single-way and double-surface welding of thin steel sheets.
Usually used for the submerge-arc welding of liquefied gas storage tanks, gas bottles and pipeline steels.
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°C for 2 hours when affected with damp.
3.It's better to use direct current.
(Chemical Composition)
SiO2+TiO2 Al2O3+MnO CaO+MgO CaF2 S P
30~40 25~30 20~30 5~13 ≤0.05 ≤0.05
(Mechanical Performance of the Deposited Metal):
Wires Standard Models 6s(Mpa) 6b(Mpa) δ5 Akv (J)
HO8A F4A2-HO8A ≥350 ≥420 ≥22% ≥27(-20°C)
HO8MnA F5A4-HO8MnA ≥410 ≥500 ≥22% ≥27(-20°C)