Name: NiCr Alloy Cr30Ni70 For HighTemperature Applications In Furnaces And HeatTreating Equipment
Brand: Senphus
Price: 1 USD

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NiCr Alloy Cr30Ni70 For High-Temperature Applications In Furnaces And Heat-Treating Equipment

Brand Name:Senphus

Certification:ISO9001

Model Number:Cr30Ni70

Minimum Order Quantity:5kg

Delivery Time:3 days

Payment Terms:T/T, D/P

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Jiangyin Chengxin Alloy Material Co., Ltd ，

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Location: Changzhou Jiangsu China

Address: Building 3, No. 29, Beitanghe East Road, Qinglong Street, Tianning District, Changzhou City, Jiangsu Province

Supplier`s last login times: within 26 hours

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Product Details

NiCr Alloy Cr30Ni70 for High-Temperature Applications in Furnaces and Heat-Treating Equipment

Cr30Ni70 is a versatile nickel-chromium alloy known for its high resistivity, excellent corrosion resistance, and high-temperature stability. With 30% chromium and 70% nickel, it offers superior performance in corrosive and high-temperature environments. This alloy is widely used in electric heating elements, furnace components, and high-temperature structural parts. Its applications span across the chemical, aerospace, and metallurgical industries, as well as in household appliances and industrial ovens. Cr30Ni70's high resistivity makes it ideal for electric heating elements, while its corrosion resistance and thermal stability make it suitable for use in corrosive and high-temperature applications. Its physical properties, such as a low coefficient of thermal expansion and good mechanical strength, further enhance its utility in a variety of demanding applications.

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.

Chemical Composition Wt.% Cr30Ni60	%	Ni	Fe	C	Si	Mn	P	S	Cr	Al
	Min				0.75				28
	Max	Rest	0.08	0.08	1.6	0.6	0.02	0.015	31	0.5

Some key features of Cr30Ni70 include:

Corrosion Resistance: Cr30Ni70 exhibits excellent resistance to various corrosive media, including oxidation, acids, and alkalis. The addition of chromium significantly enhances the alloy's corrosion resistance, providing good oxidation resistance in both oxidizing and reducing atmospheres, and relatively high resistance to environments containing sulfides and chlorides.
High-Temperature Performance: Cr30Ni70 maintains high oxidation resistance up to 1200°C and retains stable resistivity at high temperatures. It is suitable for long-term use in environments with temperatures ranging from 1000 to 1100°C, where it can still perform excellently.
Electrical Resistivity and Conductivity: Cr30Ni70 has a relatively high electrical resistivity, making it an ideal choice for electric heating elements. Its typical resistivity value is 1.18μΩ·m, and it maintains a stable resistivity even at high temperatures.
Mechanical Properties: Cr30Ni70 also performs well in terms of mechanical properties, with moderate ductility and tensile strength, which meets the manufacturing requirements for complex-shaped electric heating elements. Its mechanical parameters at room temperature are as follows: tensile strength ≥550MPa, elongation ≥20%.
Thermal Stability and Coefficient of Thermal Expansion: Cr30Ni70 has excellent thermal stability at high temperatures, maintaining dimensional stability in high-temperature environments. Its coefficient of thermal expansion is 13.0×10⁻⁶/K (20-1000°C), and this relatively low coefficient of thermal expansion makes it dimensionally stable in environments with rapid temperature changes.
Chemical Composition: The main chemical components of Cr30Ni70 include nickel (Ni) about 70%, chromium (Cr) about 30%, and trace amounts of iron (Fe), manganese (Mn), silicon (Si), carbon (C), phosphorus (P), and sulfur (S).
Physical Properties: The density of Cr30Ni70 is 8.1-8.45 g/cm³, the melting point is 1370-1410℃, and the thermal conductivity is 14 W/(m·K).

These characteristics make Cr30Ni70 alloy widely used in various fields such as chemical industry, aerospace, energy, and metallurgy, especially in applications that require high corrosion resistance and high-temperature performance.

Applications:

Heating Elements in Furnaces: Cr30Ni70 is used as heating elements in periodic heat treatment furnaces with temperatures below 1050°C, such as carburizing furnaces and bell jar furnaces
Heat-Resistant Structural Parts: It serves as high-quality heat-resistant steel structure parts, like shafts and burning frames in furnaces
Metallurgical Industry: Cr30Ni70 is used in high-temperature furnace equipment such as furnace tubes and other high-temperature apparatus due to its stability and corrosion resistance at high temperatures
Chemical Industry: The alloy is used in the production of reactors and pipelines that are resistant to high temperatures and corrosion
Electric Heating Industry: Cr30Ni70, with its high resistivity, is suitable for manufacturing electric heating wires and resistors
Aerospace: It is used in high-temperature engine parts and heat barrier materials, especially in turbines and combustion chambers
Household Appliances: Cr30Ni70 is used in electric heating elements in household appliances such as electric ovens, water heaters, and ironing boards
Industrial Ovens: The alloy is used in industrial ovens and furnaces, including wirewound resistors and metal film resistors
Injection Molds and Soldering Irons: Cr30Ni70 is also used in injection molds and soldering irons due to its high-temperature resistance and stability

These applications highlight the versatility and importance of Cr30Ni70 in various industries where high temperatures and耐腐蚀性 are critical factors.

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.

Company Profile

Company Overview:

Jiangyin Chengxin Alloy Material Co., Ltd has more than 20 years of experience as the lead.ing alloy wire manufacturer in China. We offer a wide range of services from fine wire drawing toresistance wire manufacturing. Since the beginning, our specialty has been the quality and preci.sion of our products. We have the tightest tolerances and deliver within a few days to a fewweeks. As a result, we have become the leading alloy wire supplier in the industry.

Senphus Subsidiaries:

Jiangyin Chengxin Alloy Material Co., Ltd.
Jiangyin Senphus Electrical Materials Co., Ltd.
Jiangsu Xiangcheng Supply Chain Management Co., Ltd.

Jiangyin Chengxin Alloy Material Co., Ltd.: With nearly 20 years of experience, Jiangyin Chengxin is a leading alloy wire manufacturer in China. We offer a wide range of services, from fine wire drawing to resistance wire manufacturing. Our specialty lies in the quality and precision of our products, achieving the tightest tolerances and delivering orders within days to weeks. As a result, we have established ourselves as the premier supplier of alloy wire in the industry.

Our product range includes:

Copper-nickel alloys (CuNi1-CuNi44)
Karma (Nikrothal L/Evanohm/Alloy 800)
Manganin and Constantan
Nickel-chromium alloys
Thermocouple alloys (Type K, N, E, T, J)
Thermocouple extension wire
PTC thermistor resistance alloy
Pure nickel wire and Monel alloy

These alloys are available in various forms, including wire, ribbon, stranded, and enamelled. Major applications include seat heating, underfloor heating, military projects, aerospace, household appliances, heating wire, mechanical and electrical plants, and temperature instruments. Our manufacturing processes are ISO 9001:2015 certified, and we specialize in fine and ultra-fine wire drawing, offering wire diameters from 0.025 mm (0.001") to 13 mm (0.51") in small batches, medium volumes, and mass production. We maintain a comprehensive quality inspection system, including in-house chemical analysis, chromatographic analysis, metallurgical analysis, pinhole tests, wire construction tests, and tension tests to ensure the highest quality standards.

Senphus Electrical Material Co., Ltd.: Founded in 2003, Senphus Electrical Material Co., Ltd. integrates research, manufacturing, and sales of electric heating alloys, heating cables, heating wires, and heating products. Leveraging over a decade of technical expertise in heating alloy wire, we have adopted advanced heating cable technology and machinery, successfully developing heating cables, temperature controllers, and temperature control systems suitable for building heating, pipe insulation, outdoor snow melting, wind power blade production, car seat heating, and healthcare applications.

The company is recognized as a high-tech enterprise in Jiangsu Province and a small giant enterprise in Jiangyin City, specializing in innovative technologies. We operate the "Wuxi Heating Cable Engineering Technology Research Center" and collaborate with experts from renowned domestic universities. Our portfolio includes 5 invention patents and over 30 utility model patents, showcasing our strong research and development capabilities.

With an annual output exceeding 1,000 tons of thermal alloy wire and an output value of approximately 105 million yuan, our products are well-received in markets such as the UK, Italy, Canada, Peru, and Spain. Our heating cables generate an annual output value of over 80 million yuan, with exports to Germany, Japan, the United States, Malaysia, Denmark, Brazil, and other countries.

The company has successfully passed multiple quality management system certifications, including IATF 16949, ISO 9001, ISO 14001 (Environmental Management System), and ISO 45001 (Occupational Health and Safety Management System). Our heating cables and related products have also obtained test reports from the Shanghai Cable Research Institute Test Center and received certifications such as UL (United States), VDE (Germany), CE (European Union), and RoHS.

Commitment to Quality: We adhere to the business commitment of "Reputation First, Quality First, Customer First" and uphold the quality policy of "Integrity-Based, Quality-Oriented, Excellent Service." We are dedicated to providing accurate products and professional services, and we look forward to collaborating sincerely with you to achieve mutual success.

NiCr Alloy Cr30Ni70 For High-Temperature Applications In Furnaces And Heat-Treating Equipment

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