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SJ-50
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Features and Applications
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Suitable for butt joint welding and fillet welding of mild steels and 490Mpa high tensile steels in the industries of shipbuilding, petrochemistry and nuclear power plant where high voltage equipment exists.
SJ-50 uses pure argon gas as TIG shielding gas. It is suitable for all-position welding, especially for the first bead back welding of pipes. The welding is powered by DC negative electrode(DC-).
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Points for Attention
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The purity of argon shielding gas must be above 99.997% and gas flow must be properly controlled. When welded under the operating current of 100~200Amp, the gas flow is supposed to be at about 7~12L/min; under the operating current of 200~300Amp the gas flow shoule be controlled at 12~15L/min.
During welding appropriate windproof measures must be taken, otherwise shielding gas will be easily exposed to wind so that weld bead will worsen, giving rise to gas porosity.
Choose a suitable gas-collecting porcelain cup and properly control the electrode extension of tungsten electrode.
Rust layers, oil stain and dust must be fully removed from parent metal's surface.
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An example of chemical Composition of Weld Wire(wt%)
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C
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Mn
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Si
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P
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S
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0.08
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1.50
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0.90
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0.010
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0.012
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An example of mechanical Properties of Weld Metal
Yield Strength
MPa
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Tensile Strength
MPa
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Elongation
%
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Impact Value
-29¡æ J
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485
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580
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30
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90
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Package Size:
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Wire Diameter£¨mm£©
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1.6£¬2.0£¬2.4£¬2.6£¬3.2£¬4.0
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Length£¨mm£©
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1000
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Flux cored weld wire
