Cr20Ni30 Alloy Heatin Wire

Cr20Ni30 is a low-nickel, high-chromium NiCr resistance alloy wire designed for cost-controlled operation in mid-temperature industrial electric heating systems.

Typical mix is around 30% nickel (Ni) + 20% chrome (Cr), with straightforward engineering:

• Cuts nickel big time
• Pumps up chrome to cover for less stability at heat

In real jobs, Cr20Ni30 fits when costs are tight but fast oxidation from low-chrome NiCr is a no-go.

Key Features of Cr20Ni30

Cr20Ni30’s role is spot-on: Hold oxidation as strong as possible on a budget.

• Low nickel means so-so creep resistance and stability at high heat—not great for long-term full-blast runs.
• Around 20% chrome builds oxide film quicker in air—likes open or vented spots.
• Resistance stability is decent, not top-tier, but fine for mid-temps.
• It’s an “engineering trade-off” kind of pick, not chasing max performance.

You’ll see Cr20Ni30 more in mid-temp gear or budget big-volume stuff, not fancy long-life setups.

Cr20Ni30 (Equivalent to Ni70Cr30) Specs Table

Item	Value
Alloy Name	Cr20Ni30
Equivalent Systems	Nichrome 70/30, Ni70Cr30
Common Aliases	Ni70Cr30 (global standard), Nichrome A
Composition (%)	Cr: 18–21%, Ni: 30–34%, Fe: Bal.
Max Temp	1100°C
Resistivity (20°C)	1.04 μΩ·m
Density	7.9 g/cm³
Thermal Conductivity	43.8 KJ/m·h·°C
Expansion Coefficient	19×10⁻⁶/°C
Melting Point	1390°C
Elongation	>20%
Microstructure	Austenitic
Magnetic	Non-magnetic
Standout Traits	Solid stability, strong oxidation resistance—budget pick for mid-high temp electric heating
Common Uses	Heaters, electric tubes, hair dryer wires, damping/cutting wires (foam/plastic)
Available	Diameters: 0.02–10mm; Strips: 0.02–2mm; Custom wire/strip/flat

At the same temp, Cr20Ni30’s life usually runs into surface oxidation and hot spots, not big creep failures.

Typical Cr20Ni30 Spots: Budget-tight + mid-temp steady systems

Mid-temp industrial heating gear

• Running ≤1000°C
• Okay life needs, no extremes

Well-supported elements

• Spirals, waves, ceramic backs
• Covers for lower hot strength

Budget OEM gear

• Big volumes
• Can’t afford high-nickel

Upgrade from low-chrome NiCr

• Vs. Cr15Ni60
• Big oxidation life boost

Usage Tips & Limits

Long-term ≤950–1000°C: Go higher and resistance drift plus grain growth show up.

Skip frequent on-off or picky controls: Stability not enough for super strict power.

Best for mid-temp standard stuff: Not for premium OEM long-haul cores.

Cr20Ni30’s Place in NiCr Family

Feature	Cr15Ni60	Cr20Ni30	Cr20Ni35
Nickel	Medium	Low	Medium
Chrome	Low	High	High
Oxidation Fight	Solid	Strong	Strong
High-Temp Strength	Medium	Lower	Average
Temp Sweet Spot	Mid	Upper Mid	Mid-High
Continuous Life	Medium	Medium	Medium-Long
Cost	Medium	Lower	Medium

When trimming nickel for savings but wanting better oxidation life, Cr20Ni30 is a smart mid-temp NiCr choice.

CVSIC Cr20Ni30 Custom Options

We got for Cr20Ni30 NiCr resistance wire:

• Diameters: Common mid-temp sizes
• Forms: Coils, straight, cut-to-length
• Extras: Coiling, shaping, pre-assembled parts
• Models: B2B wholesale, OEM, ODM
• Customers: Makers, element factories, engineering firms

Killer for price-watch projects and big buys.

Quality Control | Low-Nickel NiCr Keys

• Chrome levels and even surface control
• Defect management (cuts oxidation starters)
• Resistance consistency checks
• Mid-temp oxidation tests

Surface quality calls the shots on life for Cr20Ni30.

Cr20Ni30 NiCr resistance wire shines in:

• Slashing nickel costs
• Better oxidation than low-chrome NiCr
• Mid-temp controllable industrial heating

If you’re going for: Trim costs + slow oxidation + don’t push temps too high — Cr20Ni30 is a practical, no-nonsense NiCr choice.

FAQs | Engineering Stuff

Good for long-term high-heat runs?

Fine for mid-temp long runs—keep steady at 1000–1050°C or below.

Big diff from Cr20Ni35?

Lower nickel/cost, but trades some hot strength and life.

Swap for Cr15Ni60?

Yeah, better oxidation in mid-temp spots.

Fit continuous systems?

Good with controlled loads and solid supports.

Custom specs and steady supply?

You bet—built for B2B and OEM bulk.