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Cr20Ni30 Austenitic Stainless Steel Alloy For Superior Mechanical Properties And More

Cr20Ni30 The Austenitic Stainless Steel Alloy for Superior Mechanical Properties and More

NiCr Alloy Wire Cr20Ni30 is a high-performance electric heating alloy wire, widely used in industrial furnaces, heaters, and other applications. It contains 20% to 21% chromium and 30% to 34% nickel, with a maximum continuous service temperature of 1100°C and a melting point of approximately 1390°C. The alloy has a resistivity of 1.04±0.05 μΩ·m at 20°C, a density of 7.9 g/cm³, and an elongation at rupture of over 20%. It exhibits good oxidation resistance, form stability, ductility, and weldability, making it suitable for various heating applications. Typical applications include solid hot plates, open coil heaters, night-storage heaters, and resistors. The alloy is non-magnetic and has a coefficient of linear expansion of 19×10⁻⁶/°C from 20°C to 1000°C.

Chemical Composition Wt.%

Cr20Ni30

Min

Max

Bal.

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 Cr20Ni30:

High Temperature Resistance: It has a maximum continuous service temperature of 1100°C and a melting point of around 1390°C, making it suitable for high-temperature heating applications.
Good Oxidation Resistance: The alloy forms a protective oxide layer on its surface at high temperatures, which helps prevent further oxidation and extends the service life of the wire.
Stable Electrical Resistivity: With a resistivity of 1.04±0.05 μΩ·m at 20°C, it provides stable and reliable electrical performance, ensuring consistent heating output.
Excellent Ductility and Formability: It can be easily bent, shaped, and formed into various configurations without breaking, allowing for flexibility in designing heating elements.
High Tensile Strength and Elongation: Possessing a tensile strength of 650 MPa and an elongation of over 20%, it can withstand mechanical stress during installation and operation.
Non-Magnetic: The alloy is non-magnetic, which is beneficial in applications where magnetic interference needs to be minimized.
Good Weldability: It can be welded using standard welding techniques, facilitating the fabrication of complex heating assemblies.
Corrosion Resistance: It exhibits good resistance to corrosion in many environments, enhancing its durability and reliability in various industrial settings.

Applications:

Industrial Applications

Heating Elements for Industrial Furnaces

Heat Treatment Processes: Used in annealing, tempering, and sintering processes.

Glass and Ceramic Production Kilns: Ideal for high-temperature operations.

Metallurgical Melting and Casting: Suitable for heating elements in furnaces used for metal melting and casting.

Cutting and Welding Technologies

Hot Wire Foam Cutting: Used in the packaging and construction industries for precise shaping of polystyrene and similar materials.

Welding Equipment: Used as heating components in spot welders and other thermal joining tools.

Petrochemical and Process Industries

Hydrocarbon Cracking and Reforming Heaters: Used in heaters for cracking and reforming hydrocarbons.

Catalytic Reactors and Chemical Vapor Deposition Systems: Used in processing equipment requiring controlled thermal environments.

Consumer Applications
Household Heating Devices

Toasters and Ovens: Widely used for their stable heating properties.

Hair Dryers and Irons: Preferred for their high resistance to oxidation and long service life.

Electric Space Heaters: Serve as core components for efficient heat generation.

Electronic Cigarettes

Heating Coils: Commonly used in the heating coils of electronic cigarettes due to their consistent performance and compatibility with temperature control technologies.

Defrosting and Demisting

Car Windows and Refrigeration Units: Embedded in car windows and refrigeration units to provide rapid defrosting and demisting solutions.

Emerging Applications
3D Printing

Polymer Extrusion and Sintering: Used as heating elements in 3D printing applications.

Energy Storage Systems

Thermal Energy Storage Units: Used in thermal energy storage units for renewable energy solutions.

Specific Applications
Cartridge Heaters

Industrial and Commercial Use: Cartridge heaters are cylindrical and specifically shaped to fit into holes for precise and localized heating at high temperatures. They are used in various industrial applications for heating metal parts from the inside.

Defrost Heaters

Rapid Defrosting Solutions: Used in car windows and refrigeration units to provide rapid defrosting and demisting.

Efficient Heat Transfer: Used in various industrial applications for efficient heat transfer.

Industrial Furnaces

These applications highlight the versatility and reliability of NiCr Alloy Wire Cr20Ni30 in both industrial and consumer settings.

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.

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Categories	NiCr Alloy
Brand Name:	Senphus
Model Number:	Cr20Ni30
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
Name:	Cr20Ni30
Type:	Ni-Cr-Fe alloys
Application:	Heating element and resistor
Color:	Shiny silver or dark gray
Density:	7.90
Resistivity at 20 ℃:	1.06±0.05
Melting point（℃）:	1390
Thermal conductivity(KJ/m h ℃ ):	43.8
Elongation at rupture（% ):	>20