SJ-09CrCuSb
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ER70S-G
Weathering Resistant Steel SJ-09CrCuSb
Specification：AWS A5.28 ER70S-G
GB/T 150.2
NB/T 47018.3-2017
Introduction：
Suitable for welding 500Mpa grade sulfuric acid corrosion-resistant steel.
Excellent weldability,superior crack resistance, and excellent resistance to sulfuric acid dew point corrosion.
The deposited metal has excellent mechanical properties.
Suitable for welded structures such as air preheaters and heat exchangers operating in high-sulfur gas environments.
Application：
Electric power
Petrochemical
Metallurgy
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Chemical Composition of Wire %
| C | Mn | Si | P | S | Cu | Ni | Sb | Cr | Mo | Sn | V | Pb | As | Bi | |
| AWS | ≤0.12 | 0.35-0.65 | 0.20-0.40 | ≤0.025 | ≤0.015 | 0.25-0.45 | - | 0.04-0.10 | 0.70-1.10 | - | - | - | - | - | - |
| TR(HC) | 0.08 | 0.50 | 0.29 | 0.013 | 0.010 | 0.32 | 0.10 | 0.07 | 0.90 | 0.02 | 0.002 | 0.002 | 0.002 | 0.002 | 0.002 |
Mechanical Properties of Deposited Metal
| Tensile Strength | Yield Strength | Elongation | Impact Value | |||||
| Mpa | Mpa | % | -20℃ J | |||||
| TR(HC) | 550 | 445 | 27 | 117 | ||||
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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