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AWS A5.15 ENi-CI (GB EZNi-1, Z308) is a coverd electrode with pure nickel core and graphitic coating for welding cast iron.It is the best for repair welding cracked or worn castings and surfacing welding. as well as joining cast iron parts with dissimilar metals.The deposited metal is very good machinable and with a high toughness and excellent crack resistibility. The electrodes must be baked at a temperature 80℃-120℃ for 1 hour before welding.In welding,lower current is recommended,meanwhile, hammering the deposited metal to dispel stress aroud the welding region and to avoid crackles.
| Standard | AC/DC range(A) | Chemical composition of deposited metal(%) | |||||||||
| AWS | GB | φ2.5 | φ3.2 | φ4.0 | φ5.0 | C | Mn | Si | Cr | Ni | Mo |
| ENi-C1 | EZNi-C1 (Z308) | 50-70 | 70-120 | 100-150 | 130-170 | ≤2.00 | ≤1.00 | ≤2.50 | ≤8 | ≤90 | ≤0.03 |
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