Description:
J107 is a low hydrogen sodium type low alloy high strength steel electrode, using DC reverse, all-position welding.
use:
For welding tensile strength equivalent to about 980N / mm 2 low-alloy high-strength steel structure.
Deposited metal chemical composition (%)
C | Mn | Si | S | P | Mo | |
guarantee value | ≤0.20 | ≥1.00 | ≤0.70 | ≤0.035 | ≤0.035 | ≥0.30 |
Example value | 0.085 | 2.77 | 0.37 | 0.011 | 0.017 | 0.74 |
Deposited metal mechanical properties (620 ℃ × 1h)
Pilot projects | Rm (N / mm 2 ) | ReL / Rp 0.2 (N / mm 2 ) | A (%) | KV 2 (J) |
Room temperature | ||||
guarantee value | ≥980 | ≥880 | ≥12 | - |
Example value | 1050 | 930 | 18 | 90 |
Deposited metal diffusion hydrogen content: ≤ 5.0ml / 100g (chromatography or mercury method)
X-ray detection:
I level
Reference current (DC + )
Electrode diameter (mm) | φ3.2 | φ4.0 | φ5.0 |
Welding current (A) | 90 ~ 120 | 140 ~ 180 | 170 ~ 220 |
Precautions:
1. Before welding electrode to be 400 ℃ baking 1h, placed in 100 ~ 150 ℃ incubator, with the use of take.
2. Solder before welding to remove rust, oil, water and other impurities.
3. The use of short arc welding, narrow-channel welding is appropriate.
4. Weldment before welding by 200 ~ 300 ℃ preheating and tempering at about 500 ℃ after welding to eliminate internal stress.
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