J507RH
Description:
J556NiCrCu is a low hydrogen potassium type weathering steel electrode. AC and DC dual-use, can be all-position welding. The deposited metal has good resistance to atmospheric corrosion, crack resistance and good ductility and toughness.
use:
It is used for welding weathering steel structures with tensile strength of 550 N / mm 2 , such as rolling stock, offshore engineering, bridges and other structures.
Deposited metal chemical composition (%)
| C | Mn | Si | S | P | Ni | Cr | Cu |
guarantee value | ≤0.10 | ≤1.60 | ≤0.60 | ≤0.020 | ≤0.025 | 0.20 ~ 0.60 | 0.30 ~ 0.90 | 0.20 ~ 0.40 |
Example value | 0.065 | 0.95 | 0.35 | 0.010 | 0.013 | 0.52 | 0.44 | 0.25 |
Deposited metal mechanical properties
Pilot projects | Rm (N / mm 2 ) | ReL / Rp0.2 (N / mm 2 ) | A (%) | KV 2 (J) -40 ℃ |
guarantee value | ≥550 | ≥450 | ≥22 | ≥60 |
Example value | 620 | 550 | 25 | 130 |
X-ray inspection:
I level
Reference current (AC, DC + )
Electrode diameter (mm) | φ3.2 | φ4.0 | φ5.0 |
Welding current (A) | 90 ~ 140 | 150 ~ 190 | 180 ~ 220 |
Precautions:
1. Before welding electrode to be about 350 ℃ baking 1h, with the use of take.
⒉ weld before welding 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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