J857
Description:
J607RH is an ultra-low hydrogen sodium type toughness electrode for 590 N / mm 2 crack-free steel used for pressure vessel , which adopts DC reverse connection. Has a good notch impact toughness and crack resistance, can be all-position welding.
use:
For welding pressure vessels, bridges, hydropower down pipe and marine engineering and other important structures, and CF60 (62) steel to achieve a good match.
Deposited metal chemical composition (%)
| C | Mn | Si | S | P | Ni | Mo |
guarantee value | ≤0.10 | ≥1.00 | ≤0.80 | ≤0.025 | ≤0.025 | 0.60 ~ 1.20 | 0.10 ~ 0.40 |
Example value | 0.061 | 1.30 | 0.32 | 0.005 | 0.013 | 1.15 | 0.24 |
Deposited metal mechanical properties (620 ℃ × 1h)
Pilot projects | Rm (N / mm 2 ) | ReL (N / mm 2 ) | A (%) | KV 2 (J) |
-40 ℃ |
guarantee value | ≥590 | ≥490 | ≥17 | ≥47 |
Example value | 650 | 550 | 26 | 120 |
X-ray inspection:
I level
Reference current (DC + )
Electrode diameter (mm) | φ3.2 | φ4.0 | φ5.0 |
Welding current (A) | 80 ~ 120 | 130 ~ 180 | 170 ~ 240 |
Deposited metal diffusion hydrogen content: 4.0ml / 100g (chromatography or mercury method)
Precautions:
⒈ welding before the electrode to be about 350 ~ 400 ℃ baking 1h, on the 100 ~ 150 ℃ incubator, with the use of take.
⒉ weld before welding must be removed rust, oil, water and other impurities.
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