Description:
J421 is a titanium-based coating of carbon steel electrode. AC and DC dual-use, can be all-position welding. Has excellent welding process performance, good operating performance, re-arc easy, stable arc, weld appearance.
use:
Low-carbon steel welding structure, particularly suitable for small pieces of sheet metal and weld surface requirements of the beautiful and smooth cover welding.
Deposited metal chemical composition (%)
C | Mn | Si | S | P | Ni | Cr | Mo | V | |
guarantee value | ≤0.20 | ≤1.20 | ≤1.00 | ≤0.035 | ≤0.040 | ≤0.30 | ≤0.20 | ≤0.30 | ≤0.08 |
Example value | 0.079 | 0.38 | 0.21 | 0.018 | 0.024 | 0.020 | 0.032 | 0.005 | 0.010 |
Deposited metal mechanical properties (620 ℃ × 1h)
Pilot projects
| Rm (N / mm 2 ) | ReL (N / mm 2 ) | A (%) | KV 2 (J) |
0 ° C | ||||
guarantee value | ≥430 | ≥330 | ≥16 | ≥47 |
Example value | 485 | 380 | 28.5 | 86 |
X-ray inspection:
Ⅱ level
Reference current (AC, DC)
Electrode diameter (mm) | φ2.0 | φ2.5 | φ3.2 | φ4.0 | φ5.0 |
Welding current (A) | 40 ~ 70 | 50 ~ 90 | 90 ~ 130 | 130 ~ 210 | 170 ~ 230 |
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