J507CrNi
Description:
J507FeNi is a low-alloy steel electrode with iron powder low hydrogen type coating. It adopts direct current reverse connection and can be welded in all position. It has lower diffusion hydrogen content and excellent low temperature impact toughness.
use:
For medium carbon steel, low temperature steel pressure vessel welding, such as 16MnDR and so on.
Deposited metal chemical composition (%)
| C | Mn | Si | S | P | Ni |
guarantee value | ≤0.10 | ≤1.60 | ≤0.90 | ≤0.035 | ≤0.035 | 1.00-2.00 |
Example value | 0.071 | 1.05 | 0.50 | 0.006 | 0.014 | 1.30 |
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 | ≥400 | ≥20 | ≥27 |
Example value | 575 | 460 | 30 | 140 |
X-ray detection: I level
Reference current (DC + )
Electrode diameter (mm) | φ3.2 | φ4.0 | φ5.0 |
Welding current (A) | 90 ~ 120 | 120 ~ 180 | 160 ~ 210 |
Precautions:
1. Electrode before baking to be about 350 ℃ 1h, with the use of take.
2. Welding before welding parts must be removed rust, oil, water and other impurities.
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