A422
Description:
A422 is titanium calcium type Cr25Ni18Mn8 stainless steel electrode, AC and DC. Due to the addition of more Mn in the weld, the weld improves its hot cracking resistance.
use:
Cr25Ni20Si2 austenitic heat-resistant steel roll used for welding furnace rolling machine, can also be used for welding dissimilar steel.
Deposited metal chemical composition (%)
| C | Mn | Si | S | P | Cr | Ni |
guarantee value | ≤0.20 | 5.0 ~ 10.0 | ≤1.20 | ≤0.030 | ≤0.030 | 23.0 ~ 27.0 | 16.0 ~ 21.0 |
Example value | 0.080 | 6.18 | 0.80 | 0.006 | 0.020 | 24.76 | 18.60 |
Deposited metal mechanical properties
Pilot projects | Rm (N / mm 2 ) | A (%) |
guarantee value | ≥540 | ≥30 |
Example value | 580 | 41 |
Reference current (AC, DC + )
Electrode diameter (mm) | φ2.0 | φ2.5 | φ3.2 | φ4.0 | φ5.0 |
Welding current (A) | 40 ~ 80 | 50 ~ 100 | 70 ~ 130 | 100 ~ 160 | 140 ~ 200 |
Precautions:
1. Before welding electrode to be baked at 300 ℃ 1h.
2. Welding, welding is appropriate to narrow, short arc welding, to prevent overheating pool, alloying elements burning. When the arc crater arc filled.
3. For thick weld multi-layer welding, should beat the weld and edge hammering, grain refinement, reduce stress.
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