SJ-52
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ER70S-2
Low Carbon and High Strength Steel SJ-52
Specification：AWS A5.18 ER70S-2
IS0 14341-B-G 49A 3 C S2
GB/T8110-2008 ER50-2
Introduction：
ER70S-2 a gas shielding solid wire for 490MPa high strength steel.
With appropriate addition of Ti, Zr and Al, which reduces the formation of oxides during welding and reduces porosity, cracks.
Smooth feeding, stable arc, and beautiful weld bead appearance, low spatter,has excellent welding performance.
The deposited metal has good mechanical properties.
Application：
Bridges
Vehicles
Shipbulding
Pressure Vessels
Pass the certification：
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Chemical Composition of Wire %
| C | Mn | Si | P | S | Ti | Al | Zr | Cu | |
| AWS | ≤0.07 | 0.90-1.40 | 0.40-0.70 | ≤0.025 | ≤0.025 | 0.05-0.15 | 0.05-0.15 | 0.02-0.12 | ≤0.50 |
| TR(HC) | 0.06 | 1.12 | 0.66 | 0.010 | 0.005 | 0.10 | 0.10 | 0.10 | 0.15 |
Mechanical Properties of Deposited Metal
| Tensile Strength | Yield Strength | Elongation | Impact Value | |||||
| Mpa | Mpa | % | -30℃ J | |||||
| TR(HC) | 546 | 458 | 25 | 85 | ||||
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) |
| 0.6(0.023) | 80-180 | √ | √ | √ | √ | |||
| 0.8(0.030) | 80-220 | √ | √ | √ | √ | |||
| 0.9(0.035) | 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 | √ | √ | √ | √ | √ | ||
| 2.0(5/64) | 200-500 | √ | √ | √ | √ | |||
Welding position：
Shielding Gas：
75%~80%Ar+CO₂
or：
CO₂
Points for Attention：
1.Gas Flow Rate: 20~25 L/min.
2.Contact Tip-to-Work Distance (CTWD): 15~25 mm.
3.Removal of rust, moisture, oil, dust, and others from the welding area.
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