SJ-50G
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TH500-NQ-II
Weathering Resistant Steel SJ-50G
Specification：TB/T2374-2008 TH500-NQ-II
Introduction：
Suitable for 500MPa grade atmospheric corrosion-resistant steel.
Appropriate adding of alloying elements Cu, P, Ni, Cr, Cu to the welding wire forms a dense and stable oxide protective film on the surface.
Excellent weldability，easy slag removal and beautiful weld bead appearance.
Application：
Bridges
Construction machinery
Container
Railway vehicles
Pass the certification：
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Chemical Composition of Wire %
| C | Mn | Si | P | S | Cu | Ni | Cr | |
| AWS | ≤0.10 | 1.0-1.60 | ≤0.60 | ≤0.025 | ≤0.020 | ≤0.50 | 0.20-0.60 | 0.30-1.0 |
| TR(HC) | 0.07 | 1.1 | 0.23 | 0.010 | 0.009 | 0.30 | 0.40 | 0.60 |
Mechanical Properties of Deposited Metal
| Tensile Strength | Yield Strength | Elongation | Impact Value | |||||
| Mpa | Mpa | % | -40℃ J | |||||
| TR(HC) | 560 | 460 | 25 | 77 | ||||
Packing and Recommended Parameters:(DC+)
| Diameter | Spool | Drum | ||||||
| mm/in | Current range(A) | 0.9kg(2 lbs) | 5kg (11 lbs) | 15kg(33 lbs) | 20kg(44 lbs) | 250kg(551 lbs) | 350kg(771lbs) | 400kg(881 lbs) |
| 0.8(0.030) | 80-220 | √ | √ | √ | √ | |||
| 1.0(0.040) | 100-250 | √ | √ | √ | √ | √ | ||
| 1.2(0.045) | 140-350 | √ | √ | √ | √ | √ | ||
| 1.4(0.052) | 180-370 | √ | √ | √ | √ | √ | √ | |
| 1.6(1/16) | 200-400 | √ | √ | √ | √ | √ | ||
Welding position：
Shielding Gas：
80% Ar+CO₂
Points for Attention：
1. Gas Flow Rate: 20~25 L/min.
2. Contact Tip-to-Work Distance (CTWD): 15~25 mm.
3. Remove the rust, moisture, oil, dust, and others from the welding area.
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