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Jiangyin Chengxin Alloy Material Co., Ltd ，

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City:changzhou

Province/State:jiangsu

Country/Region:china

Contact Person:MrChangfeng Ye

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China Cr25Ni20 Austenitic Alloy With Large Specific Resistance For Electric Heating Applications wholesale

Cr25Ni20 Austenitic Alloy With Large Specific Resistance For Electric Heating Applications

Name: Cr25Ni20 Austenitic Alloy With Large Specific Resistance For Electric Heating Applications
Brand: Senphus
Price: 1 USD

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Brand Name :Senphus

Model Number :Cr25Ni20

Certification :ISO9001

Place of Origin :China

MOQ :5kg

Payment Terms :T/T, D/P

Supply Ability :30 Tons per day

Delivery Time :3 days

Packaging Details :Packed with waterproof paper or weave bag, into pallets or wooden case. Special packaging requirements can also be accommodated.

Place of Orig :China

Type :Ni-Cr-Fe alloys

Application :Heating element and resistor

Color :Shiny silver or dark gray

Density :7.15

Resistivity at 20 ℃ :0.95±0.05

Melting point（℃） :1400

Thermal conductivity(KJ/m h ℃ ) :43.8

Elongation at rupture（% ) :>20

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Cr25Ni20 Austenitic Alloy with Large Specific Resistance for Electric Heating Applications

Cr25Ni20 is a high-performance nickel-chromium-iron alloy consisting of approximately 25% chromium, 20% nickel, and the balance iron. This alloy is designed to withstand extreme conditions, offering excellent resistance to oxidation, carburization, and other forms of high-temperature corrosion. Its superior mechanical strength and stability at elevated temperatures make it ideal for applications in demanding industrial environments.

The alloy's composition provides a balance of oxidation resistance and structural integrity, mking it suitable for prolonged use in temperatures up to 1100°C (2012°F). It also exhibits good creep strength and resistance to thermal fatigue, essential for high-temperature industrial processes.

Cr25Ni20 is widely used in applications such as heat treatment equipment, furnace components, petrochemical processing, and power generation. Typical components include heating elements, radiant tubes, heat exchangers, and combustion systems. Its durability, resistance to scaling, and reliable performance in harsh environments make it a preferred material in industries requiring high-temperature strength and corrosion resistance.

Chemical Composition Wt.%

Cr25Ni20

Min

Max

Bal.

0.02

0.8

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.

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

Some key features of Cr25Ni20 include:

High-Temperature Resistance:

Maintains strength and structural integrity at temperatures up to 1100°C (2012°F), making it suitable for extreme heat applications.

Excellent Oxidation Resistance:

Resists oxidation in both air and combustion environments, ensuring long-term performance in high-temperature settings.

Corrosion Resistance:

Offers good resistance to carburization, nitridation, and sulfidation, even in chemically aggressive environments.

Good Mechanical Strength:

High tensile strength and creep resistance at elevated temperatures, ensuring reliability in demanding conditions.

Thermal Fatigue Resistance:

Withstands thermal cycling and repeated heating and cooling without significant degradation or cracking.

Durability in Harsh Conditions:

Resists scaling and degradation in corrosive and oxidizing atmospheres, making it ideal for prolonged use in industrial processes.

Weldability and Fabricability:

Can be easily welded and fabricated into complex shapes for specific industrial requirements.

Versatility:

Suitable for a variety of industrial applications, including heat exchangers, furnace components, and petrochemical processing equipment.

These features make Cr25Ni20 a reliable choice for high-temperature, high-stress applications across multiple industries.

Applications:

Heat Treatment Industry:

Furnace Components: Used in furnace linings, trays, and fixtures due to its resistance to oxidation and thermal fatigue.

Heating Elements: Ideal for heating elements operating at high temperatures.

Petrochemical Industry:

Reformer Tubes: Suitable for use in reformer and cracker tubes exposed to carburizing and oxidizing atmospheres.

Catalyst Support Structures: Withstands high temperatures in catalytic reactors.

Power Generation:

Heat Exchangers: Used in boilers and other systems requiring resistance to thermal stress and corrosion.

Combustion Systems: Components in turbines, burners, and exhaust systems.

Aerospace and Automotive:

Exhaust Systems: Utilized in high-performance automotive and aircraft exhaust systems for its heat resistance.

Turbine Components: Suitable for hot gas environments in jet engines and power turbines.

Metal Processing:

Kiln Components: Lining materials and support structures in kilns and metallurgical equipment.

Rollers and Conveyor Belts: Used in industrial kilns and continuous casting operations.

Chemical Processing:

Reactors and Retorts: Handles aggressive chemical environments in high-temperature reactors and chemical processing equipment.

Glass Manufacturing:

Molds and Tools: Operates effectively in high-temperature glass forming processes.

Cement Industry:

Rotary Kilns: Utilized in components subjected to extreme heat and corrosive atmospheres during cement production.

Cr25Ni20’s ability to withstand high temperatures, corrosion, and mechanical stress makes it indispensable in industries where durability and reliability are critical.

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.

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