SJ-2CM is suitable for welding of 620Mpa high tensile steels. Applicable to high temperature tube, architecture, building industries of machinery pressure vessel, oil spitting etc whose temperature is below 550¡æ.
Points for Attention
Ensure that the purity of shielding gas and mixing ratio of properly mixed gas is well controlled.
Keep the shielding gas flow at 20-25L/min
Keep the electrode extension between 15-25mm
Rid the welded part of rusty layer, damp, oil stain and dust, etc.
Always keep torch nozzle clean and TIP in good condition.
Use the wire under the best possible conditions.
Strict control over heating temperature, the temperature between layers and temperature treatment after welding.
An example of chemical Composition of Weld Wire(wt%): (Shielding gas:Ar+1~5%O2)
C
Mn
Si
P
S
Cr
Mo
0.077
0.60
0.55
0.010
0.008
2.40
1.15
An example of mechanical Properties of Weld Pass:(Shielding gas: Ar+1~5%O2) Heat treatment after welding(609¡æ ¡Á1h)
Flux cored weld wire
