ERNiCu-CI Nickel-Copper Welding Wire

Product Description

Grade: ERNiCu‑CI Nickel‑Copper Wire

ERNiCu‑CI nickel‑copper alloy solid wire is an economical‑grade MIG welding consumable specially developed for ordinary low‑load cast iron repair work. It features moderate crack‑resistance performance with higher deposited weld hardness. This cost‑effective welding wire is widely used for repairing sand holes, porosity and minor casting defects on non‑machined cast iron components like valve bodies and housings.

Important note: This product is NOT suitable for precision‑machined working surfaces or high‑load impact‑bearing positions.

Chemical Composition (Wt%)

Element	Content
Ni	≈60.0
Cu	≈35.0
Fe	Balance
C	≤0.05
Si	≤0.50
Mn	≤1.00
S	≤0.03
P	≤0.03

Mechanical Properties (Weld Deposit)

Item	Result
Tensile Strength	≥ 400 MPa
Elongation	≥ 10 %

Recommended Welding Parameter

Parameter	Value
Welding Current	90‑130 A
Arc Voltage	18‑22 V
Shielding Gas	Pure Argon / Argon +5~10% CO₂
Wire Feed Speed	4.0‑6.0 m/min

Features & Characteristics

✅ Economical grade with competitive lower price
✅ Moderate cracking‑resistant performance
⚠️ Weld deposit with relatively high hardness
⚠️ Poor machinability for precision finishing

Typical Application

Repair for low‑load ordinary cast‑iron workpieces
Repair sand holes, shrinkage cavities and minor casting defects
Repair non‑machined surfaces of cast iron valves, gear housings and pump housings
Restriction: Do not use on precision‑finished surfaces, high‑stress or impact‑loaded working locations

Welding Operation Guidelines

Thoroughly clean the welding groove and remove dirt, oil, rust before welding.
Use short‑circuit metal transfer mode, run welding at relatively low current.
Adopt segmented intermittent welding. Hammer the weld bead after welding for stress relief.
Preheat thick cast‑iron workpieces to 100‑200°C prior to welding.
Do not apply this wire for components under high‑stress and impact service conditions.