CuNi44 Alloy Wire

CuNi44 is a NiCu alloy wire built for stable medium-to-high temp industrial electric heating jobs like ovens, heat treat equipment, and non-stop furnaces.

Standout Features of CuNi44 (Constantan)

CuNi44 is the “stability ceiling” beast in the NiCu lineup.

• Nickel around 44%
• High and rock-steady resistivity (≈ 0.49–0.52 μΩ·m)
• Near-zero temp coefficient—resistance barely moves with heat.
• Stable thermoelectric stuff—huge for thermocouple compensation and precision resistors.
• Not chasing “hotter temps,” but “dead reliable”

CuNi44 (NC050) Specs Table (Constantan Type)

Item	Value
Alloy Name	CuNi44 (NC050)
Alias	Constantan
Composition (%)	Ni ≈44, Mn: 1%, Cu Bal.
Max Continuous Temp	500°C
Melting Point (approx.)	1280°C
Density	8.9 g/cm³
Resistivity (20°C)	0.50 μΩ·m ±5%
Tensile Strength	≥420 MPa
Elongation	≥25%
TCR (20–600°C)	< -6×10⁻⁶/°C (near-zero drift)
Standout Traits	Classic Constantan, super low drift, high stability, oxidation tough
Common Uses	Precision resistors, strain gauges, bridges, instrument standards
Available	Fine wire, strip, ultra-thin foil

CuNi44 Spots

• Industrial furnaces/ovens: Medium-high temp heating—even control
• Non-stop high-temp heating: High-nickel → Stable oxidation, long reliability
• Precision heat treat gear: 450–500°C processes—steady resistance/uniform heat
• Premium OEM fits: Custom coils/pre-fab parts—into high-temp systems

Usage Tips & Limits

Long-term ≤500°C

• Pricey, but performance super “obedient”
• Fits systems needing extreme stability

CuNi44 Selection Comparison

Grade	Ni%	Cu%	Resistivity	Oxidation	High-Temp Strength	Life	Cost	Quick Take
CuNi2	2	98	0.435–0.45	Solid	Medium	Medium-Long	Low–Medium	Low power low-temp steady → Budget pick
CuNi6	6	94	0.45–0.48	Solid	Medium-High	Medium-Long	Medium	Medium nickel → Reliable medium-temp non-stop
CuNi10	10	90	0.48–0.52	Solid	Medium-High	Medium-Long	Medium-High	High nickel → Reliable medium-high temp non-stop
CuNi23	23	77	0.52–0.55	Solid	High	Medium-Long	Medium-High	High nickel → Best medium-high precision non-stop
CuNi30	30	70	0.55–0.58	Solid	High	Medium-Long	Medium-High	High nickel → Optimal medium-high sustained runs
CuNi34	34	66	0.57–0.60	Solid	High	Medium-Long	Medium-High	High nickel → Best high-temp precision industrial non-stop
CuNi44	44	56	0.60–0.65	Solid	High	Medium-Long	Medium-High	High nickel → Top high-temp continuous/precision heat treat, long-life industrial

Quotable engineering conclusion: CuNi44 properties → High nickel → High-temp precision non-stop heating long stability → Top engineering reliability

CVSIC CuNi44 Custom Options

• Diameters: 0.05–2 mm, custom
• Forms: Coils, straight, cut-to-length
• Extras: Coil winding, shaping, pre-fab components
• Models: Wholesale, OEM, ODM
• Customers: Industrial makers, heat treat firms, system integrators
• Tip: Great for long bulk—steady wire/dimensions

Quality & Consistency

• Strict Ni/Cu ratio for resistance/oxidation
• 100% batch resistivity/size checks
• Simulated long-run aging/oxidation—drift < ±3%
• Traceable spools for bulk control

Wrap-Up

CuNi44 high-nickel copper-base NiCu alloy wire brings high resistivity, excellent oxidation resistance, high-temp long stability, and low magnetism—spot-on for high-temp industrial electric heating systems, ovens, and precision heat treat gear.

• Properties → Results: High nickel → Reliable high-temp non-stop → Steady resistance, longer life
• Pick tip: CuNi44 for long-term high-temp non-stop; CuNi23/CuNi30/CuNi34 medium-high; CuNi2/CuNi6/CuNi10 medium/low budget
• B2B bulk/OEM/ODM custom—easy for engineers/procurement calls.

FAQs

Max long-term temp for CuNi44?

Air long-term 450–500°C, short 550–600°C—high nickel keeps it steady.

Vs CuNi34—why pick?

CuNi44 → Higher nickel → Better higher temp continuous, fits long-term high-temp industrial treat; CuNi34 → Medium-high precision non-stop, bit cheaper.

Thermal cycles hit CuNi44?

High nickel handles tons—steady structure, low drift.

OEM custom CuNi44 parts—what?

Coil winding, shaping, pre-fab—into high-temp industrial systems direct.

Big volume CuNi44 long projects?

Batch trace, composition/resistance checks—long-term bulk consistent.

Precision heat treat gear?

Super low magnetism—even/steady control, perfect for precision non-stop.