Description:
W807 is a low hydrogen sodium type coating containing Ni low temperature steel electrode, DC reverse, all-position welding. At -80 ℃ deposited metal still has good impact toughness.
use:
Welding -80 ℃ work 1.5Ni steel structure.
Deposited metal chemical composition (%)
C | Mn | Si | S | P | Ni | |
guarantee value | ≤0.07 | 1.10 ~ 1.40 | ≤0.50 | ≤0.035 | ≤0.035 | 1.20 ~ 1.60 |
Deposited metal mechanical properties (620 ℃ × 1h)
Pilot projects
| Rm (N / mm 2 )
| ReL / Rp 0.2 (N / mm 2 )
| A (%)
| KV 2 (J) |
-80 ° C | ||||
guarantee value | ≥490 | ≥400 | ≥20 | ≥27 |
Medicine skin moisture content: ≤0.30%
X-ray inspection:
I level
Reference current (DC + )
Electrode diameter (mm) | φ2.0 | φ2.5 | φ3.2 | φ4.0 | φ5.0 |
Welding current (A) | 40 ~ 70 | 60 ~ 90 | 90 ~ 120 | 140 ~ 180 | 170 ~ 210 |
Precautions:
1. Before welding electrode to be 350 ~ 400 ℃ baking 1.5h, with the baking with the use.
2. Welding should try to use small and medium-sized specifications, multi-layer multi-track welding, layer temperature control at 200 ℃ below.
3 must be removed before welding weld rust, oil, water and other impurities.
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