SJ-55-Ni3
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ER80S-Ni3
Low Alloy low temperature Steel SJ-55Ni3
Specification：AWS A5.28 ER80S-Ni3
GB/T 8110 ER55-Ni3
ISO 14341-B:G 55P 7 M13 SN71
Introduction：
For 550MPa grade low temperature resistant steel welding, nomial containing 3% Ni.
Good impact toughness at low temperature, the deposited metal has good mechanical properties.
Smooth feeding, stable arc, and beautiful weld bead appearance, low spatter.
Application：
low temperature Storage tank
low temperature Pipeline
low temperature vessels
low temperature machinery
Pass the certification：
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Chemical Composition of Wire %
| C | Mn | Si | P | S | Cr | Mo | Ni | V | |
| AWS | ≤0.12 | ≤1.25 | 0.40-0.80 | ≤0.020 | ≤0.010 | ≤0.15 | ≤0.35 | 2.0-5.0 | ≤0.050 |
| TR(HC) | 0.04 | 0.88 | 0.50 | 0.011 | 0.004 | 0.02 | 0.03 | 3.24 | 0.008 |
Mechanical Properties of Deposited Metal
| Tensile Strength | Yield Strength | Elongation | Impact Value | PWHT | |||||
| Mpa | Mpa | % | -75℃ J | ℃xh | |||||
| TR(HC) | 586 | 482 | 27 | 65 | 620 x 1 | ||||
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) |
| 1.0(0.040) | 80-250 | √ | √ | √ | √ | √ | ||
| 1.2(0.045) | 100-350 | √ | √ | √ | √ | √ | ||
| 1.4(0.052) | 200-400 | √ | √ | √ | √ | √ | √ | |
| 1.6(1/16) | 250-500 | √ | √ | √ | √ | √ | √ | |
Welding position：
Shielding Gas：
98% Ar+2% O₂
Points for Attention：
1. PWHT requirement: 620℃ x 1h
2. Preheating and interpass temperature: 135-165 ℃;
3. Gas Flow Rate: 20~25 L/min.
4. Remove the rust, moisture, oil, dust, and others from the welding area.
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