Accord with: GB/T5293  F4A0-H08A  F5A0-H08MnA

Equivalently: AWS-A5.17 F6A0-EL12  F7A0-EM12K  DIN BSC  198AC 10SKM
      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.
Cautione:
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.
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	бs (Mpa)	бb (Mpa)	δ5	Akv (J)
HO8A HO8MnA	F4A2-HO8A F5A4-HO8MnA	≥350 ≥410	≥420 ≥500	≥22% ≥22%	≥27(-20°C) ≥27(-40°C)