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Model NO.: SJ301
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Type: Organic
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Function: Protect Weld Metal
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Manufacturing Method: Smelting
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Specification: SJ301
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HS Code: 38109000
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state: Solid
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Chemical Composition: SiO₂>30%
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Application: Submerged-arc Welding
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Transport Package: Pallets
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Origin: China
Welding flux(SJ301) Conforming to: GB/T5293 F4A0-H08A F5A0-H08Mn2
Welding flux(SJ301) Equivalent to: AWS-A5.17 F6A0-EL12 F7A0-EM12K DIN BSC 198AC 10SKM
Welding flux(SJ301) Description:
SJ301is a kind of silicon-calcium sintered flux, mesh 10-40(that is 1.7-0.38mm) and
the basicity is 1.0-1.1. Either alternate or direct current can be used, while the welding wires
must be connected with the positive electrode when direct current is used. Produced with excel-
lent technology, the flux has the properties of fine slag detachability and fine welding bead
appearance.
Welding flux(SJ301) 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.
Compositions of fluxes(%)
| SiO2+TiO2 |
CaO + MgO |
Al2O3+MnO |
CaF2 |
S |
P |
| 25-35 |
15-25 |
30-40 |
5-15 |
≤0.06 |
≤0.08 |
Typical all weld metal mechanical property
| Wire matched |
Yield point
σs (MPa) |
Tensile Strabgth
σb(MPa) |
Elongation
δ5(%) |
AKV(J) |
| 0ºC |
-20ºC |
| H08A |
≥330 |
415-550 |
≥24 |
≥50 |
≥27 |
| H08MnA |
≥400 |
480-650 |
≥24 |
≥50 |
≥27 |
| EL12 |
≥330 |
415-550 |
≥24 |
≥50 |
-- |
| EM12K |
≥400 |
480-650 |
≥24 |
≥50 |
-- |
Welding flux(SJ301) Cautions:
1. The welding flux must be baked for 2 hours at the temperatures of 300-350ºC before build-up welding.
2. Some foreign substances such as rust, grease and moisture on the weldment should be removed before welding.
