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Cr20Ni80 / 80Ni20Cr / NiCr8020 Durable Alloy Wire Strand For Electric Power Generation And Chemical Processing

Cr20Ni80 / 80Ni20Cr / NiCr8020 Durable Alloy Wire Strand For Electric Power Generation And Chemical Processing

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Cr20Ni80 / 80Ni20Cr / NiCr8020 Durable Alloy Wire Strand For Electric Power Generation And Chemical Processing

Cr20Ni80 (80Ni20Cr / NiCr8020) alloy wire strand is a high-performance nickel-chromium alloy known for its excellent electrical resistance, high-temperature strength, and oxidation resistance. Comprising approximately 80% nickel and 20% chromium, this alloy is widely used in electrical heating elements, industrial furnaces, and resistors. It offers superior resistance to corrosion and thermal fatigue, making it ideal for demanding applications requiring stable performance at elevated temperatures. The alloy exhibits a high melting point (~1400°C) and maintains mechanical integrity in harsh environments. Its excellent ductility and workability allow for easy fabrication into various forms, including stranded wire for enhanced flexibility and strength. Commonly used in heating cables, resistance wire, and industrial heating systems, NiCr8020 provides reliable and long-lasting performance. Its low thermal expansion and resistance to oxidation make it a preferred choice for high-temperature applications across multiple industries, including aerospace, automotive, and electronics.

Chemical Composition Wt.% Cr20Ni80	%	Ni	Fe	C	Si	Mn	P	S	Cr	Al
	Min				0.75				20
	Max	Rest	1	0.08	1.6	0.6	0.02	0.015	23	0.5

Trade Code

GB	JIS	ASTM	DIN EN/DIN	GOST
Cr20Ni80	NCHW-1 NCHR-1	80Ni20Cr	NiCr8020	Х20Н80-Н

Main characteristics of Ni-Cr and Ni-Cr-Fe electric heating alloys

Type Performance		Cr30Ni70	Cr15Ni60	Cr20Ni35	Cr20Ni80	Cr20Ni30	Cr25Ni20
Main Chemical composition	Ni	Rest	55.0-61.0	34.0-37.0	Rest	30.0-34.0	19.0-22.0
	Cr	28.0-31.0	15.0-18.0	18.0-21.0	20.0-23.0	18.0-21.0	24.0-26.0
	Fe	≤ 1.0	Rest	Rest	≤ 1.0	Rest	Rest
Max. continuous service temp. of element (℃)		1250	1150	1100	1200	1100	1050
Resistivity at 20 ℃(μΩm)		1.18±0.05	1.12±0.05	1.04±0.05	1.09±0.05	1.06±0.05	0.95±0.05
Density(g/cm3)		8.10	8.20	7.90	8.40	7.90	7.15
Thermal condyctivity (KJ/m·h·℃)		45.2	45.2	43.8	60.3	43.8	43.8
Coefficient of lines expansion (α×10-6/℃)		17.0	17.0	19.0	18.0	19.0	19.0
Melting point (approx.)(℃)		1380	1390	1390	1400	1390	1400
Elonation at rupture(%)		＞20	＞20	＞20	＞20	＞20	＞20
Micrographic structure		Austenite	Austenite	Austenite	Austenite	Austenite	Austenite
Magnetic properties		Non-magnetic	Low-magnetic	Low-magnetic	Non-magnetic	Low-magnetic	Non-magnetic
Note:The various grades of electric resistance alloy material are blended with the amountof rare earth, titanium and other trace elements, to improve the processing performance andextend the period of the uselife.

Cr20Ni80 / 80Ni20Cr / NiCr8020 Alloy Wire Strand – Key Features

1. High-Temperature Resistance

Withstands temperatures up to 1200°C (2192°F), making it ideal for heating elements.

2. Excellent Electrical Resistivity

Resistivity of ~1.09 Ω·mm²/m, ensuring stable and consistent electrical performance.

3. Superior Oxidation & Corrosion Resistance

High nickel content provides strong resistance to oxidation in high-temperature environments.

Resistant to chemical corrosion, making it suitable for harsh conditions.

4. High Mechanical Strength & Ductility

Maintains structural integrity under thermal cycling.

Offers good formability and ease of processing.

5. Long Service Life

Excellent creep resistance and thermal stability ensure extended lifespan in demanding applications.

6. Wide Range of Applications

Used in resistance heating elements, industrial furnaces, home appliances, and electronic components.

Applications:

Cr20Ni80 (also known as 80Ni20Cr or NiCr8020) is a high-resistance nickel-chromium alloy widely used in various industrial applications due to its excellent electrical resistance, oxidation resistance, and high-temperature performance. Here are some of its key applications when used as a wire strand:

1. Electrical Heating Elements

Commonly used in heating elements for industrial furnaces, kilns, and ovens.

Found in electric heating pads, hair dryers, and toasters.

Suitable for cartridge heaters and tubular heating elements in household and commercial applications.

2. Resistors and Electrical Components

Used in precision resistors due to its stable electrical resistance.

Applied in shunt resistors and load banks for industrial and automotive purposes.

Used in voltage dividers and current sensors.

3. Aerospace & Automotive Applications

Employed in high-temperature sensors, including thermocouples (typically as the "negative" leg in Type K and E thermocouples).

Used in aircraft and automotive exhaust systems that require high-heat resistance.

4. Hot Cutting Wires

Used in foam cutting machines for precise cutting of polystyrene (EPS, XPS) and other materials.

Employed in hot wire cutters for shaping wax, rubber, and plastics.

5. Glass and Ceramics Industry

Found in glass melting electrodes and ceramic kilns.

Used in furnaces that process glass and ceramic materials at high temperatures.

6. Industrial and Laboratory Equipment

Applied in hot air dryers and temperature-controlled chambers.

Used in lab furnaces and controlled-environment heating applications.

7. Corrosion-Resistant Applications

Suitable for marine and chemical industry applications where oxidation and corrosion resistance are required.

Used in high-humidity or high-temperature environments that would degrade other materials.

8. Medical and Scientific Devices

Found in specialized lab heating equipment.

Used in biomedical research instruments that require precise heat control.

Because of its superior mechanical properties, NiCr8020 wire strands are ideal for applications that require long service life, resistance to thermal cycling, and stable electrical performance.

Technical data of wires

Dia. (mm)	Cross-sectional area (mm²)	Weight/Meter (g/m)	Resistance/Meter at 20 ℃ (Ω/m)	Dia. (mm)	Cross-sectional area (mm²)	Weight/Meter (g/m)	Resistance/Meter at 20 ℃ (Ω/m)
0.018	0.000255	0.002117	3410-4610	0.25	0.04909	0.4074	20.88-23.54
0.020	0.000314	0.002606	2940-3740	0.28	0.06158	0.5111	16.64-18.76
0.022	0.000380	0.003154	2440-3100	0.30	0.07069	0.5867	14.49-16.35
0.025	0.000491	0.004075	1880-2400	0.32	0.07548	0.6265	12.74-14.36
0.028	0.000616	0.005113	1530-1870	0.33	0.08553	0.7099	12.20-13.40
0.030	0.000707	0.005868	1338-1696	0.38	0.1134	0.9412	9.13-10.09
0.032	0.000804	0.006673	1180-1440	0.40	0.1257	1.0433	8.24-9.108
0.035	0.000962	0.007985	981-1200	0.41	0.132	1.0956	7.68-8.89
0.040	0.001257	0.01043	780.7-954.1	0.45	0.159	1.3197	6.51-7.196
0.045	0.00159	0.0132	594-726	0.50	0.1963	1.6293	5.273-5.829
0.050	0.001963	0.01629	499.6-610.6	0.55	0.2376	1.9721	4.518-4.994
0.055	0.00238	0.01975	407-477	0.60	0.2827	2.3464	3.797-4.197
0.063	0.00312	0.02590	321.41-377.31	0.65	0.3318	2.7539	3.235-3.575
0.070	0.00385	0.03196	260.5-305.9	0.70	0.3848	3.1938	2.789-3.083
0.080	0.005027	0.04172	199.5-234.1	0.75	0.4418	3.6669	2.43-2.686
0.090	0.006362	0.0528	157.6-185.0	0.80	0.5027	4.1724	2.136-2.36
0.100	0.007854	0.0652	127.7-149.9	0.85	0.5674	4.7094	1.891-2.091
0.110	0.009852	0.08177	105.5-123.9	0.90	0.6362	5.2805	1.687-1.865
0.120	0.01227	0.1018	88.67-104.1	0.95	0.7088	5.883	1.46-1.62
0.140	0.01539	0.1277	65.85-75.77	1.00	0.7854	6.5188	1.367-1.511
0.150	0.01767	0.1467	56.75-66.63	1.10	0.9503	7.8875	1.13-1.26
0.160	0.02011	0.01669	50.42-58.00	1.12	0.9852	8.1772	1.05-1.17
0.170	0.022700	0.1884	44.18-51.86	1.18	1.0936	9.0769	0.95-1.05
0.180	0.02545	0.2112	40.26-45.40	1.20	1.313	10.8979	0.79-0.87
0.190	0.02835	0.2353	35.37-41.53	1.30	1.327	11.0141	0.78-0.86
0.200	0.03142	0.2608	32.62-36.78	1.40	1.539	12.7737	0.70-0.77
0.212	0.035300	0.2930	28.41-33.35	1.50	1.767	14.6661	0.60-0.67
0.220	0.03801	0.3155	26.65-30.39	1.60	2.011	16.8924	0.52-0.58

The tolerance or wires diameter

Wires	Dia.(mm)	Tolerance
	0.018-0.025	±0.001
	0.028-0.035	±0.0015
	0.040-0.055	±0.002
	0.070	±0.0025
	0.08-0.10	±0.003
	0.11-0.14	±0.004
	0.16-0.20	±0.005
	0.22-0.25	±0.006
	0.28-0.30	±0.007
	0.32-0.40	±0.01
	0.41-0.50	±0.015
	0.55-0.80	+0.02/-0.03
	0.85-1.00	+0.02/-0.03
	1.10-1.50	±0.03
Note:special specification can be produced as per client's request.

Technical data of ribbon

Thickness × Width(mm)	Resistance/meter(20 ℃) (Ω/m)	Surface area/ohm (20℃) (cm2/Ω)	Weight/meter (g/m)	Surface area/meter (cm2/m)
0.09x2.5	5.27	9.84	1.72	51.8
0.08x0.2	74	0.0756	0.122	5.6
0.08x0.3	49.4	0.154	0.183	7.6
0.08x0.4	37	0.259	0.244	9.6
0.08x0.5	29.6	0.392	0.305	11.6
0.08x0.6	24.7	0.551	0.367	13.6
0.08x0.7	21.2	0.737	0.428	15.6
0.08x0.8	18.5	0.951	0.489	17.6
0.08x0.9	16.5	1.19	0.55	19.6
0.08x1.0	14.8	1.46	0.611	21.6
0.08x1.2	12.3	2.07	0.733	25.6
0.08x1.5	9.87	3.2	0.916	31.6
0.08x1.8	8.23	4.57	1.1	37.6
0.08x2.0	7.4	5.62	1.22	41.6
0.07x0.2	84.6	0.0638	0.107	5.4
0.07x0.3	56.4	0.131	0.16	7.4
0.07x0.4	42.3	0.222	0.214	9.4
0.07x0.5	33.9	0.337	0.267	11.4
0.07x0.6	28.2	0.475	0.321	13.4
0.07x0.7	24.2	0.637	0.374	15.4
0.07x0.8	21.2	0.822	0.428	17.4
0.07x0.9	18.8	1.03	0.481	19.4
0.07x1.0	16.9	1.26	0.535	21.4
0.07x1.2	14.1	1.8	0.641	25.4
0.07x1.5	11.3	2.78	0.802	31.4
0.06x0.2	98.7	0.0527	0.0916	5.2
0.06x0.3	65.8	0.109	0.137	7.2
0.06x0.4	49.4	0.186	0.183	9.2
0.06x0.5	39.5	0.284	0.229	11.2
0.06x0.6	32.9	0.401	0.275	13.2
0.06x0.7	28.2	0.539	0.321	15.2
0.06x0.8	24.7	0.697	0.367	17.5
0.06x0.9	21.9	0.875	0.412	19.2
0.06x1.0	19.7	1.07	0.458	21.2
0.06x1.2	16.5	1.53	0.55	25.2
0.05x0.2	118	0.0422	0.0764	5.00
0.05x0.3	79	0.0886	0.115	7.00
0.05x0.4	59.2	0.152	0.153	9.00
0.05x0.5	47.4	0.232	0.191	11.00
0.05x0.6	39.5	0.329	0.229	13.00
0.05x0.7	33.9	0.443	0.267	15.0
0.05x0.8	29.6	0.574	0.305	17.0
0.05x0.9	16.3	0.722	0.344	19.0
0.05x1.0	23.7	0.886	0.382	21.0
Ribbon is rolled by the wire, the actual cross-sectional area of the ribbon is smaller 8％ than calculated by the rectangular.

WHY CHOOSE US

OEM/ODM

We provide OEM/ODM service and customized service.

COMPETITIVE PRICE

We can give customers the most competitive price to meet your budget and guarantee the quality.

CERTIFICATION

We have the authority certificates of quality and safety which are all in accordance with international quality standards.

R&D TEAM

Our R&D team can help make our products work better for your project.

FACTORY APPEARANCE

With a professional technical team, we can provide personalized customization services according to customer project requirements, from product design, material selection to production process adjustment, to ensure that customers' special specifications and performance requirements are met.

Factory

PACKAGING AND DELIVERY

FAQ

Can I visit your factory before ordering?

Of course, you are welcome to visit the factory.

Do you provide samples?

Yes, we provide samples if needed, but customers need to pay the sample fee. Usually sample lead time is 7 days after payment has been confirmed.

What are the advantages of price and quality?

We have our own production and inspection equipment. There are always pre-production samples before mass production, and there are always final inspections before shipment.Quality is the tenet of our company.

Can you supply what is the service?

We can supply the kinds of metal materials and products,and we also can supply other process services.

Are you Manufacture or Trade Company?

We are manufacture,we have 20+ years experience for supply Metal material and products in domestic.