J421Fe (38. 14)
Description:
J427CrCu is a low hydrogen weathering steel electrode, the DC reverse connection, can be all-position welding, deposited metal has excellent atmospheric corrosion resistance, good ductility and toughness.
use:
For welding 12MnCrCu and other weathering steel structure.
Deposited metal chemical composition (%)
| C | Mn | Si | S | P | Cr | Cu |
guarantee value | ≤0.12 | 0.30-0.70 | ≤0.35 | ≤0.035 | ≤0.040 | 0.30-0.80 | 0.20-0.50 |
Example value | 0.063 | 0.65 | 0.30 | 0.006 | 0.015 | 0.60 | 0.30 |
Deposited metal mechanical properties (welded)
Pilot projects | Rm (N / mm 2 ) | ReL / Rp 0.2 (N / mm 2 ) | A (%) | KV 2 (J) |
-20 ° C |
guarantee value | ≥420 | ≥330 | ≥22 | ≥27 |
Example value | 565 | 480 | 27 | 153 |
X-ray inspection requirements:
I level
Reference current (DC + )
Electrode diameter (mm) | φ3.2 | φ4.0 | φ5.0 |
Welding current (A) | 80-120 | 130-180 | 170-240 |
Precautions:
1. Before welding electrode to be baked at 350 ℃ for 1 hour, with the use of baking.
2. Welder must be removed before welding rust, oil, water and other impurities.
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