J507 (J48.57)
Description:
J507Q is a low hydrogen sodium type of ultra-low hydrogen and high toughness bridge steel for low alloy steel electrode, the use of DC reverse, with good welding performance, weld metal has excellent ductility, toughness and crack resistance, can be carried out Full position welding.
use:
For low alloy steel bridge welding.
Deposited metal chemical composition (%)
| C | Mn | Si | S | P | Ni |
guarantee value | ≤0.10 | ≤1.60 | ≤0.70 | ≤0.020 | ≤0.020 | 1.00 ~ 2.00 |
Example value | 0.065 | 1.0 | 0.38 | 0.008 | 0.030 | 1.40 |
Deposited metal mechanical properties (620 ℃ × 1h)
Pilot projects | Rm (N / mm 2 ) | ReL / Rp 0.2 (N / mm 2 ) | A (%) | KV 2 (J) -40 ℃ |
.guarantee value | ≥490 | ≥ 390 | ≥22 | ≥47 |
Example value | 550 | 460 | 30 | 120 |
X-ray detection: I level
Reference current (DC + )
Electrode diameter (mm) | φ3.2 | φ4.0 | φ5.0 |
Welding current (A) | 80 ~ 120 | 130 ~ 180 | 170 ~ 240 |
Precautions:
1. Before welding electrodes to be 350 ~ 400 ℃ baking 1 hour, then placed in a 100 ~ 150 ℃ incubator, with the use of take.
2. Welding before welding parts must be removed rust, oil, water and other impurities.
3. When welding to be used to operate a short arc to narrow the weld is appropriate.
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