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Cr20Ni35 Heat Resistant Nickel Chromium Iron Alloy with High Positive Temperature Coefficient

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Cr20Ni35 Heat Resistant Nickel Chromium Iron Alloy with High Positive Temperature Coefficient

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Brand Name :	Senphus
Model Number :	Cr20Ni35
Certification :	ISO9001
Payment Terms :	T/T, D/P
Supply Ability :	30 Tons per day
Delivery Time :	3 days

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Cr20Ni35 Heat Resistant Nickel Chromium Iron Alloy with High Positive Temperature Coefficient

Cr20Ni35 Heat-Resistant Nickel-Chromium-Iron Alloy with High Positive Temperature Coefficient

NiCr Alloy Wire Cr20Ni35 is a high-performance nickel-chromium alloy composed of 20% chromium and 35% nickel, designed for high-temperature resistance, oxidation resistance, and corrosion resistance. This alloy is particularly known for its use in heating elements, resistors, and industrial applications that require stable performance at elevated temperatures. NiCr Alloy Wire Cr20Ni35 is a versatile material offering excellent high-temperature performance, corrosion resistance, and stable electrical resistivity, making it an ideal choice for applications like heating elements, resistors, thermocouples, and other high-temperature electrical components. Its ability to perform reliably in industrial furnaces, ovens, and electrical heating systems ensures it is widely used across industries where durability and performance under heat are essential. Despite its higher cost compared to other alloys, its superior performance in extreme conditions justifies its use in high-demand applications.

Chemical Composition Wt.%

Cr20Ni35

Min

Max

Rest

0.08

0.02

0.015

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.

Key Features of NiCr Alloy Wire Cr20Ni35:

Composition:

Nickel (Ni): 35% (provides excellent high-temperature stability and good electrical resistivity).

Chromium (Cr): 20% (enhances oxidation resistance and improves strength at high temperatures).

Iron (Fe): The balance, used to enhance the overall mechanical properties of the alloy.

Carbon (C): Low content to improve machinability and prevent carbide precipitation during heat exposure.

High-Temperature Resistance:

Designed to withstand continuous exposure to temperatures up to 1100°C (2012°F).

Maintains strength and stability at elevated temperatures, making it suitable for resistive heating applications and other high-heat environments.

Oxidation and Corrosion Resistance:

Oxidation Resistance: The alloy has a high degree of oxidation resistance due to the chromium content, which forms a stable oxide layer that prevents further oxidation.

Corrosion Resistance: With its significant chromium content, it also offers resistance to corrosion in many environments, particularly oxidizing atmospheres at high temperatures.

Electrical Resistivity:

Stable Electrical Resistivity: Offers a predictable and stable resistance under high temperatures, making it ideal for heating elements, resistors, and thermocouples.

Good Heat Generation Efficiency: Due to its resistive properties, it generates heat efficiently when used in electrical heating applications.

Mechanical Properties:

Strength and Ductility: Provides good tensile strength at high temperatures and remains ductile enough for fabrication.

Thermal Fatigue Resistance: Resistant to thermal cycling, making it ideal for applications that undergo repeated heating and cooling cycles.

Weldability and Fabrication:

Weldable: Can be welded using standard welding techniques such as TIG (GTAW) and MIG (GMAW) welding, with minimal risk of cracking or other issues.

Formability: Easily drawn into wires, rods, and other shapes for a variety of applications, particularly in heating elements and electrical components.

Applications:

Heating Elements: Commonly used in industrial furnaces, electric heating elements, and ovens where high-temperature stability is critical.
Resistors: Used in the manufacturing of precision resistors and resistor grids that require stable electrical resistance.
Thermocouples and Sensors: Suitable for high-temperature thermocouples and temperature sensing elements.
Electrical Components: Often found in electrical heating components such as toasters, dryers, water heaters, and other similar products.
High-Temperature Applications: Also used in some chemical processing applications that require materials resistant to high heat and oxidation.

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.

Advantages of NiCr Alloy Wire Cr30Ni35:

High-Temperature Performance: Excellent resistance to high-temperature oxidation, making it suitable for environments up to 1100°C (2012°F).
Good Electrical Resistivity: Ideal for use in heating elements, resistors, and other electrical applications where stable resistivity is required.
Corrosion Resistance: Resists corrosion in a range of high-temperature, oxidizing conditions.
Fatigue and Thermal Cycling Resistance: Withstands repeated heating and cooling without degradation.
Fabrication Flexibility: Can be easily fabricated into wire forms for a range of applications, especially in industrial and electrical environments.

Limitations of NiCr Alloy Wire Cr30Ni35:

Cost: As with most high-performance alloys, it may be more expensive compared to other metals like stainless steel, which may limit its application in cost-sensitive areas.
Limited Resistance to Strong Acids: While it is highly resistant to oxidation, it may not perform as well in strongly acidic or highly corrosive environments compared to specialized alloys like Inconel or Hastelloy.
Cold Work Hardening: Can work-harden during cold-forming processes, requiring specialized handling or processing methods to prevent cracking or damage.

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Cr20Ni35 Heat Resistant Nickel Chromium Iron Alloy with High Positive Temperature Coefficient

Key Features of NiCr Alloy Wire Cr20Ni35:

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Nickel-Chromium-Iron Alloy Cr20Ni35

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Cr20Ni35 Heat Resistant Nickel Chromium Iron Alloy with High Positive Temperature Coefficient