Cr30Ni70 Heating Wire

Cr30Ni70 is a high-nickel high-chrome NiCr resistance wire built for high-temp industrial electric heating systems, with top-notch oxidation resistance, high-temp strength, and long-term stability. We support B2B custom, OEM, and bulk.

Model: CV-Cr30Ni70
Alloy Grade: NiCr70/30
Main Composition: Ni: Bal. (about 70%), Cr: 28–31%, Fe: ≤1.0%
Max Temp: 1200°C
Resistivity (20°C): 1.18 μΩ·m
Density: 8.1 g/cm³
Forms Available: Diameters: 0.02–10mm (round) Strips: 0.02–2mm Custom flat wire, rods, coils
Common Uses: Industrial furnace wires – High-temp elements – Ceramic heaters – High-temp ovens/tunnel kilns – Mold heating, lab furnaces

Cr30Ni70 is a high-nickel, high-chromium NiCr resistance alloy wire designed for long-term stable operation in high-temperature industrial electric heating systems.

Contents hide

2. Cr30Ni70 (Ni70Cr30, High-Chrome Type) Specs Table

6. Quality Control | Batch Consistency Wins

Typical mix is around 70% nickel (Ni) + 30% chrome (Cr), not chasing max temps, but targeting:

Steady resistance over long runs
Solid structure when hot
Low creep and failure in non-stop ops

In real jobs, Cr30Ni70 fits “stability and life first” industrial electric heating, not budget-tight projects.

Key Features of Cr30Ni70

Cr30Ni70 is all about “stability and life first” in NiCr.

Up to 30% chrome builds a super dense, stable oxide layer at high heat, slowing oxidation way down.
70% nickel keeps it tough and creep-resistant when hot.
Rock steady structure and resistance in 1000–1200°C, big win for long hauls.
Perfect for 24/7 non-stop, not chasing cheap.

Cr30Ni70 wins from “stable mix → stable structure → steady performance long-term.”

Cr30Ni70 (Ni70Cr30, High-Chrome Type) Specs Table

Item	Value
Alloy Name	Cr30Ni70
Equivalent System	Nichrome 70/30 (high-chrome type)
Common Aliases	Ni70Cr30, Nichrome 70/30, NiCr70/30
Composition (%)	Ni: Bal. (about 70%), Cr: 28–31%, Fe: ≤1.0%
Max Temp	1200°C (top in NiCr series)
Resistivity (20°C)	1.18 μΩ·m
Density	8.1 g/cm³
Thermal Conductivity	45.2 KJ/m·h·°C
Expansion Coefficient	17×10⁻⁶/°C
Melting Point	1380°C
Elongation	>20%
Microstructure	Austenitic
Magnetic	Non-magnetic
Standout Traits	Top oxidation fight – Great high-temp strength – Built for long continuous runs – Better heat stability/corrosion than 20Cr series
Common Uses	Industrial furnace wires – High-temp elements – Ceramic heaters – High-temp ovens/tunnel kilns – Mold heating, lab furnaces
Available	Diameters: 0.02–10mm (round) Strips: 0.02–2mm Custom flat wire, rods, coils
Processing	OEM/ODM, fixed resistance, cut-to-length, surface oxidation, vacuum annealing, etc.

Cr30Ni70 shines in “time stability” at 1000–1200°C, not just peak temp.

Typical Cr30Ni70 Spots

High-temp industrial electric furnaces

Heating wires, strips, meshes
Needs even temps and reliable runs

Non-stop electric heating (24/7)

Low resistance drift
Low break risk
Beats mid-nickel NiCr easy

Precision heat treat/temp control gear

Cuts drift from aging
Keeps params steady long-term

Premium OEM standard stuff

Great for long bulk supply
Engineering consistency

Usage Tips & Limits

Long-term ≤1150–1200°C

Still watch loads—don’t just crank temp.

Pricey—not for super cheap projects.

Cr30Ni70 Selection Comparison

Feature	Cr20Ni80	Cr30Ni70	Cr15Ni60
Nickel	High	Super High	Medium
Chrome	Medium	High	Low
Oxidation Fight	Strong	Top-Notch	Solid
High-Temp Strength	Solid	Rock-Solid	Average
Resistance Stability	High	Top-Notch	Medium
Continuous Life	Long	Longer	Medium
Cost	Higher	Highest	Medium

NiCr picks are about managing risks, not just temp numbers.

When aiming for long stable runs, low maintenance, high consistency over lowest cost, Cr30Ni70 is the top NiCr choice.

CVSIC Custom Options

We offer engineering-grade for Cr30Ni70 NiCr resistance wire:

Diameters: Common industrial (custom too)
Forms: Coils, straight, cut-to-length
Extras: Coiling, shaping, pre-fab components
Models: Wholesale, OEM, ODM
Customers: Makers, engineering firms, system integrators

Perfect for premium long-term kits and project buys.

Quality Control | Batch Consistency Wins

Steady NiCr melt/composition control
Double checks resistivity/diameter
High-temp aging/oxidation tests
Traceable batches for repeat projects

We care about “qualified” plus consistent engineering performance across batches.

Cr30Ni70 NiCr resistance wire isn’t cheap—it’s made for high-temp, long-term, stable industrial electric heating.

If you’re after: Less maintenance · Longer life · Steadier heating — Cr30Ni70 is worth putting first.

FAQs

Long-term at 1200°C?

In air, keep ≤1150–1200°C long-term with smart loads for best life.

Main edge over Cr20Ni80?

Better high-temp strength, creep fight, long-term resistance stability—killer for continuous systems.

Good for frequent on-off?

Yeah—high-nickel austenitic handles cycles better.

Standard for premium gear?

Totally—great for OEMs watching life, consistency, maintenance costs.

Custom and steady supply?

You bet—tailored specs/stable bulk for projects.

Looking for Reliable High Temperature Heating Solutions?

Contact CVSIC today for a one-stop solution for deheating! With over fifteen years of R&D and manufacturing experience, we have absolute confidence in our products! Feel free to contact us for free samples for trial!

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Products Related To Cr30Ni70 Heating Wire

CuNi44 Alloy Wire

Model: CV-CuNi44
Alloy Grade: CuNi44 (NC050)
Main Composition: Ni ≈44, Mn: 1%, Cu Bal.
Max Temp: 500°C
Resistivity (20°C): 0.50 μΩ·m ±5%
Density: 8.9 g/cm³
Forms Available: Wire, strip, ultra-thin foil
Common Uses: Precision resistors, strain gauges, bridges, instrument standards