Description

The NC-50 welding electrode is engineered to deliver exceptional performance on cast iron applications where reliability, tensile strength, and weld quality are critical. Manufactured with a high-nickel iron core, NC-50 provides a stable, soft arc that creates uniform, easy-to-control weld beads.

It is specially designed to prevent electrode overheating, reduce cracking risks, and produce weld metal that remains fully machinable — even on challenging repair jobs.

Key Features & Benefits

• Iron-Nickel Alloy Core for high strength & excellent metallurgical compatibility with cast iron.

• Smooth & Stable Arc ensures easy bead placement and minimal spatter.

• Crack-Resistant Weld Deposits ideal for repairing stressed or aged castings.

• Fully Machinable Weld Metal allows precision finishing after welding.

• Overheat-Resistant Electrode Design improves durability during long repair jobs.

• Suitable for All Positions except vertical down.

• Ideal for cast iron to steel joints.

Recommended Applications

Suitable for fabrication and repair of:

• Cast iron housings, engine blocks & pump bodies

• Machinery components & machine frames

• Casting defects & flaws

• Cracks, worn edges, and damaged casting areas

• Thick-section castings

• Joining cast iron to steel components

Specifications

Standards

• AWS: A5.15 ENiFe-Cl

• JIS: DFC NiFe

• DIN: 8573 ENiFe-G2

Typical Chemical Composition (% of Weld Metal)

Typical Mechanical Properties

Size & Recommended Current Range (AC / DC+)

Welding Positions

• All positions except vertical down.

Usage & Welding Guidelines

• Clean the surface thoroughly — remove paint, rust, oil, grease, and oxides.

• For castings with sand inclusions, ensure deep cleaning and preparation.

• Use NFG cutting electrodes for defect removal and crack preparation.

• Small castings can be welded without preheat, keeping interpass temperature “hand-hot.”

• Weld in short 25–50 mm beads with frequent cooling intervals.

• Always fill the crater at bead ends to prevent cracking.

• Remove all slag before laying the next bead.

• Avoid weaving; use straight beads and hammer peen while hot.

• Large castings: preheat to 100–300°C and cool slowly after welding.

Approvals

• N/A

Important Note

All data above is presented as typical and should not be considered a guarantee. Actual results depend on welding parameters, base metal condition, joint design, and fabrication methods. Always perform qualification testing before final application.