ERNiCu-7 Nickel-Copper MIG Wires

Category： MIG Wires

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ERNiCu-7 Nickel-Copper MIG Wires

GB/T 15620 SNi4060 | AWS A5.14

1. Chemical Composition (wt.%)

	C	Mn	Fe	P	S	Si	Cu	Ni	Ti	Al	Others
GB/T	≤0.15	2.0-4.0	≤2.5	≤0.02	≤0.015	≤1.20	28.0-32.0	≥62.0	1.5~3.0		≤0.5
AWS	≤0.15	≤4.0	≤2.5	≤0.02	≤0.015	≤1.25	Balance	62.0-69.0	1.5~3.0		≤0.5
Example	0.026	3.42	1.8	<0.001	<0.001	0.17	27.96	65.2	1.78		≤0.5

2. Mechanical properties of all-weld metal – typical values

	Proof Stress Rp0.2 (MPa)	Tensile Strength Rm (MPa)	Elongation A (%)	Impact Energy J / °C
GB/T	200	480	27	-
AWS	-	480	30	-
Typical value	360	485	39.5	-

3. Description and Applications

1. ERNiCu-7 is a nickel-copper alloy solid welding wire with a nominal composition of 65Ni-30Cu-3Mn-Ti.

It provides a stable arc and smooth weld bead appearance.

Its titanium content helps control weld porosity and supports favorable deposited-metal mechanical properties.

2. Suitable for joining nickel-copper alloys, dissimilar welding of nickel-copper alloys to steel, and weld overlay on steel.

X-ray radiographic inspection: Grade I

4. Available Diameters

	MIG
Diameter (mm)	1.0、1.2、1.6

5. Welding Precautions

1. Remove all oil, rust, lubricants, moisture, marker ink, and other surface contaminants from the weld area before welding.

2. Keep heat input as low as practicable to reduce the risk of hot cracking. A low interpass temperature, preferably below 100°C, is recommended.

3. For outdoor welding, provide wind protection when wind speed exceeds 1.5 m/s; inadequate shielding gas coverage may cause weld bead deterioration and porosity.

4. For TIG welding, a tungsten electrode extension of approximately 5 mm beyond the nozzle and an arc length of 1–3 mm are recommended.

Keywords： ERNiCu-7 Nickel-Copper MIG Wires

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