J502 Welding Electrode
J502 is a carbon steel electrode with calcium titanium coating. It can be used for both AC and DC, and can be used for all-position welding. It has excellent welding process performance and mechanical properties, stable arc, little spatter, easy slag removal, and beautiful weld shape.
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Chemical composition of deposited metal
| project | C | Mn | Si | S | P | Ni | Cr | Mo | V |
| Guaranteed value | ≤0.15 | ≤1.25 | ≤0.90 | ≤0.035 | ≤0.040 | ≤0.30 | ≤0.20 | ≤0.30 | ≤0.08 |
| Example | 0.09 | 0.70 | 0.24 | 0.020 | 0.025 | 0.030 | 0.035 | 0.005 | 0.004 |
Mechanical properties of deposited metal
| project | tensile strengthRm/MPa | Yield StrengthRel/Rp0.2 MPa | ElongationA（%） | Charpy V-notch impact absorption energyKV2（J） |
| 0℃ | ||||
| Guaranteed value | ≥490 | ≥400 | ≥20 | ≥27 |
| Example | 530 | 450 | 28 | 90 |
Reference current
| Welding diameter（mm） | Φ2.5 | Φ3.2 | Φ4.0 | Φ5.0 |
| Welding length(mm) | 300 | 350 | 400 | 400 |
| Welding current（A） | 60~100 | 80~140 | 140~220 | 180~240 |
Features:
J502 is a carbon steel electrode with calcium titanium coating. It can be used for both AC and DC, and can be used for all-position welding. It has excellent welding process performance and mechanical properties, stable arc, little spatter, easy slag removal, and beautiful weld shape.
Usage:
It is mainly used for the welding of low alloy steel structures with a tensile strength level of 490MPa, such as construction rebar and other structural steels such as 16Mn.
Precautions:
Under normal circumstances, the electrode does not need to be baked before welding. When the electrode gets wet, it must be baked at 150-170°C for 0.5-1 hour before use.
