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NiCr Cr30Ni70 Resistance Wire for High-Temp Heating is a high-performance alloy wire composed of 70% nickel and 30% chromium, designed for superior high-temperature performance and durability. Known for its excellent oxidation resistance, high electrical resistivity, and stable heating properties, this wire is ideal for demanding applications in industrial and domestic heating systems.
Cr10Ni90/Cr20Ni80/Cr30Ni70/Cr15Ni60/Cr20Ni35/Cr20Ni30
DLX
Bright
Customized Size
8.4g/cm3
637-784Mpa
ISO9001/ CE/ROHS
5kg
1300-1390°C
5-20 Days
chemical,petroleum
Product Description
NiCr Cr30Ni70 Resistance Wire is a high-performance alloy wire composed of 70% nickel and 30% chromium, designed for superior high-temperature performance and durability.
Known for its excellent oxidation resistance, high electrical resistivity, and stable heating properties, NiCr Cr30Ni70 Resistance Wire is ideal for demanding applications in industrial and domestic heating systems. With a maximum continuous operating temperature of 1200°C, NiCr Cr30Ni70 Resistance Wire is a reliable choice for efficient and long-lasting heating elements.
Max Continuous Service Temperature: 1200°C
Melting Point: 1400°C
Surface: Bright or Oxidized
Condition: Annealed
Capable of operating continuously at temperatures up to 1200°C, ideal for high-heat industrial and domestic applications.
Forms a protective chromium oxide layer, preventing degradation and extending lifespan even in oxidative environments.
With a resistivity of 1.09 μΩ·m, NiCr 80/20 ensures efficient and stable heating with minimal energy loss.
Resists corrosion in acidic, alkaline, and humid conditions, making it suitable for challenging industrial settings.
Easily shaped into coils, spirals, or strips, supporting complex heating element designs for various applications.
Non-magnetic structure makes it ideal for applications requiring minimal electromagnetic interference.
Specification
Shape | Size(mm) |
| Wire | 0.05-7.5 |
| Rod | 8-50 |
| Ribbon | (0.05-0.35)*(0.5-6.0) |
| Strip | (0.5-2.5)*(5-180) |
| Performance material | Cr10Ni90 | Cr20Ni80 | Cr30Ni70 | Cr15Ni60 | Cr20Ni35 | Cr20Ni30 | |
| composition | Ni | 90 | Rest | Rest | 55.0～61.0 | 34.0～37.0 | 30.0～34.0 |
| Cr | 10 | 20.0～23.0 | 28.0～31.0 | 15.0～18.0 | 18.0～21.0 | 18.0～21.0 | |
| Fe | -- | ≤1.0 | ≤1.0 | Rest | Rest | Rest | |
| Maximum temperature℃ | 1300 | 1200 | 1250 | 1150 | 1100 | 1100 | |
| Meltiing point ℃ | 1400 | 1400 | 1380 | 1390 | 1390 | 1390 | |
| Density(g/cm3) | 8.7 | 8.4 | 8.1 | 8.2 | 7.9 | 7.9 | |
| Resistivity | -- | 1.09±0.05 | 1.18±0.05 | 1.12±0.05 | 1.00±0.05 | 1.04±0.05 | |
| Elongation at rupture | ≥20 | ≥20 | ≥20 | ≥20 | ≥20 | ≥20 | |
| Specific heat J/g.℃ | -- | 0.44 | 0.461 | 0.494 | 0.5 | 0.5 | |
| Thermal conductivity KJ/m.h℃ | -- | 60.3 | 45.2 | 45.2 | 43.8 | 43.8 | |
| Coefficient of lines expansion | -- | 18 | 17 | 17 | 19 | 19 | |
| Micrographic structure | -- | Austenite | Austenite | Austenite | Austenite | Austenite | |
| Magnetic properties | -- | Nonmagnetic | Nonmagnetic | Nonmagnetic | Nonmagnetic | Nonmagnetic | |
Application Field
NiCr Cr30Ni70 Resistance Wire is valued for its versatility and reliability across various industries:
Furnace Heating Elements: Used in ceramic, glass, and metal processing furnaces for consistent and high-temperature heating.
Heat Treatment Furnaces: Provides precise temperature control for annealing, tempering, and hardening processes.
Electric Heaters and Kettles: Ensures rapid and efficient heating with long-term durability.
Toasters and Ovens: Supports high-temperature cooking and baking with stable performance.
Metallurgical Furnaces: Ideal for melting and alloying metals in corrosive environments.
Precision Components: Used in manufacturing automotive and aerospace parts requiring controlled heating.
Semiconductor Manufacturing: Provides clean and stable heating for wafer processing and deposition systems.
Resistors and Sensors: Integrated into high-precision resistors and temperature sensors.
Our Advantage
CHANGZHOU DLX ALLOY CO, LTD was established in 2002 and has got ISO9001 International Quality Management System Certificate and SGS Certificate. Our factory is professional in researching and producing special alloy material. From melting, drawing, heat treatment, finishing and testing .We offer nickel-based, copper-based, and iron-based alloys, including super alloy, welding materials, anti-corrosion alloy, precision alloy, FeCrAl alloy, NiCr alloy, CuNi alloy, thermocouple and etc, in the form of wire, strip, ribbon, bar, tube, plate.
1.Market Leader - Top 5 in China's nonferrous metal industry
2.Flexible products - Thousands of product specifications,Meet multiple needs of buyers
3.Low MOQ - Can customize samples
4.Short production lead time，fast delivery of whole cabinet
5.Professional inspection equipment - Before delivery, we will use spectrometers, tensile testers and other professional equipment to conduct a comprehensive inspection of the products to ensure that the goods are qualified for acceptance
6.Professional business team - Quickly responds to customer inquiries,24-hour professional quotation online The salesperson will follow the customer's requirements for the use of the product,Professionally recommend more appropriate performance and price products to customers
7.Intact packaging - Packaging according to customer needs.You can customize wooden boxes to ensure that the goods arrive at the destination in good condition
8.Various payment methods - Facilitate customer payment
9.Get good reviews from customers - Old customers have long-term cooperation,The longest is more than 7 years
10.Received various awards - Google is very recognized by us,They give us awards every year
Product Process
A: Cr30Ni70, also known as NiCr7030, Ni70Cr30, or Nichrome 70/30, is a high-performance nickel-chromium heating alloy containing approximately 70% nickel and 30% chromium. It belongs to the electrothermal alloy family and is equivalent to international grades such as HRE, Kanthal A-1 alternative, and Resistohm 70. Manufactured in China with stable resistivity and excellent oxidation resistance, it is widely regarded as one of the best high-temperature resistance wires available.
A: Cr30Ni70 heating wire can continuously operate at temperatures up to 1250°C (2282°F), with short-term peak temperatures reaching 1300°C. Its superior high-temperature stability and long service life make it ideal for industrial furnaces, kilns, and heavy-duty heating elements.
A: Cr30Ni70 is widely used in:
Industrial electric furnaces and muffle furnaces
Ceramic kilns and glass melting furnaces
High-temperature laboratory heating equipment
Electric heating elements in household appliances (ovens, toasters)
Resistors and precision heating components
Heat treatment furnaces in metallurgy and aerospace industries
A: Compared to Cr20Ni80:
Cr30Ni70 offers higher nickel content → better corrosion and oxidation resistance
Maximum service temperature: 1250°C (vs 1200°C for Cr20Ni80)
Longer lifespan in high-temperature oxidizing environments
Slightly lower resistivity (1.38 μΩ·m vs 1.09 μΩ·m) Cr30Ni70 is preferred in applications requiring extreme temperature stability and extended service life.
A: Yes! DLX Alloy provides OEM/ODM services including custom-wound heating coils, spiral elements, and pre-annealed wire based on your drawings and voltage/wattage requirements.
