CHARACTERISTICS & APPLICATIONS
ísol-NCI is a solid continuous bare electrode composed of essentially pure nickel (99%) and contains no deoxidizers. The electrode is used to weld iron castings when weld metal with highly diluted filler metal is to be machined. Shielded Gases. Shielding gases should be used as recommended by the manufacturer.
Post weld Heat Treatment: PWHT may also be used to improve the machineability of the heat-affected zone adjacent to the weld metal. Tempering beads sometimes are employed to achieve the desired improvement. These beads, consisting entirely of filler metal and a previous bead, are made in such a manner that the heat input tempers any martensite present from a previous bead.
CHEMICAL COMPOSITION OF UNDILUTED WELD METAL
| C | Mn | Si | P | S | Fe | Ni* | Mo | Cu# | Mg | Al | Ce | Oth |
| 1.0 | 2.5 | 0.75 | NS | 0.03 | 4.0 | 90 min | NS | 4.0 | NS | NS | NS | 1.0 |
Single values shown are maximum, unless otherwise noted. *Nickel plus incidental cobalt. #Copper plus incidental silver.
ELECTRODE SIZE & WELDING CURRENT (GMAW)
| Size, mm | Current, DCEP, A | Arc Voltage (Volts) | Shielding Gas |
| 1.20 | 180-250 | 28-32 | 75% Argon/25 Helium |
| 1.60 | 200-280 | 29-33 | 75% Argon/25 Helium |
SHIELDING-GAS: 75% Argon/25 Helium
- If sizes other than 1.2 mm and 1.6 mm are used, wire feed speed (and resulting current), arc voltage, and tip-to-work distance shall be changed as needed.
- If shielding gases other than recommended are used, the wire feed speed (and resulting current), arc voltage, and travel speed shall be as agreed to between purchaser and METAFIL.
- The required combination of electrode feed rate, arc voltage, and tip-to-work distance should produce welding currents in the ranges shown.
- Currents substantially outside these ranges suggest errors in feed rate, tip-to-work distance, voltage settings, or in instrumentation.
ELECTRODE SIZE & WELDING CURRENT (GTAW)
| Size, mm | Current, DCEP, A | Arc Voltage (Volts) | Shielding Gas |
| 0.80 | 60-90 | 12-15 | 100% Argon |
| 1.20 | 80-110 | 13-16 | 100% Argon |
| 1.60 | 90-130 | 14-18 | 100% Argon |
| 2.40 | 120-175 | 15-20 | 100% Argon |
| 3.20 | 150-220 | 15-20 | 100% Argon |
SHIELDING-GAS: 100% Argon
- Arc voltage shall be reported for information only. The voltage range is only a suggested range and may change based on power source characteristics. Typically, the voltage cannot be set independent of the current.
WARNING: Safety and health information is available from many sources, including, but not limited to Safety and Health Fact Sheets listed in A11.3, ANSI Z49.1 Safety in Welding, Cutting, and Allied Processes published by the American Welding Society, 8669 Doral Blvd., Suite 130, Doral, FL 33166., and applicable federal and state regulations. The Safety and Health Fact Sheets are revised, and additional sheets added periodically.