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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 Cr30Ni70/NiCr7030/ХН70Ю NiCr Alloy With Weldability And Fabrication For Resistors wholesale

ХН70Ю NiCr Alloy With Weldability And Fabrication For Resistors

Name: Cr30Ni70NiCr7030ХН70Ю NiCr Alloy With Weldability And Fabrication For Resistors
Brand: Senphus
Price: 1 USD

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Brand Name :Senphus

Model Number :Cr30Ni70/NiCr7030/ХН70Ю

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 :Cr30Ni70/NiCr7030/ХН70Ю

Type :Ni-Cr-Fe alloys

Application :Heating element and resistor

Color :Shiny silver or dark gray

Density :8.10

Resistivity at 20 ℃ :1.18±0.05

Melting point（℃） :1380

Thermal conductivity(KJ/mh ℃ ) :45.2

Elongation at rupture（% ) :>20

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Cr30Ni70/NiCr7030/ХН70Ю NiCr Alloy With Weldability And Fabrication For Resistors

NiCr Alloy Wire Cr30Ni70 (NiCr7030, ХН70Ю) is a high-performance alloy made of 30% chromium and 70% nickel, offering excellent high-temperature resistance, corrosion resistance, and good electrical resistivity. This alloy is particularly suitable for applications in industries requiring durability in high-temperature environments, such as electrical heating elements, resistors, and industrial furnaces. NiCr Alloy Wire Cr30Ni70 (NiCr7030, ХН70Ю) is an excellent choice for applications requiring high-temperature stability, corrosion resistance, and consistent electrical resistivity. Its ability to perform under extreme heat makes it a top contender for industries involved in heating elements, resistors, and industrial furnaces. While it comes at a higher cost than basic alloys, its robust performance in demanding environments justifies its use in applications where longevity and reliability are critical.

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

Key Features of NiCr Alloy Wire (Cr30Ni70, NiCr7030, ХН70Ю):

Composition:

Nickel (Ni): 70% (primary element for high-temperature stability and corrosion resistance).

Chromium (Cr): 30% (provides oxidation resistance and improves the alloy's high-temperature strength).

Carbon (C): Small amount, improving strength and resistance to wear.

Iron (Fe): Trace amounts, used for structural integrity.

Other trace elements may include manganese, silicon, and sulfur.

High-Temperature Resistance:

Performs well in high-temperature environments, making it ideal for heating elements and resistors used in applications requiring stable performance at elevated temperatures, often up to 1000°C to 1100°C (1832°F to 2012°F).

Corrosion and Oxidation Resistance:

Excellent Oxidation Resistance: Chromium content ensures the alloy maintains its structural integrity by forming a protective oxide layer when exposed to high temperatures, preventing further degradation.

Resistant to Scaling and Sulfidation: Performs well in environments that involve high temperatures and exposure to sulfur-containing atmospheres.

Electrical Resistivity:

Moderate Electrical Resistivity: Offers reliable and stable resistive properties, making it suitable for use in resistors, heating elements, and thermocouples.

Stable Resistance at Elevated Temperatures: The alloy maintains stable resistance across a wide range of operating temperatures.

Mechanical Properties:

Tensile Strength: Provides good tensile strength at high temperatures, allowing it to withstand mechanical stresses in industrial heating applications.

Ductility: Exhibits good ductility for forming and shaping into wires or strips for industrial uses.

Weldability and Fabrication:

Weldable: NiCr7030 can be welded using standard techniques, including gas tungsten arc welding (GTAW) and gas metal arc welding (GMAW).

Formability: Can be easily drawn into wires and other shapes without compromising performance.

Applications:

Heating Elements: Commonly used in electrical heating systems such as electric furnaces, ovens, dryers, and toasters.
Resistors: Ideal for manufacturing precision resistors and thermal sensors.
Electrical and Electronics: Used in thermocouples and resistance temperature detectors (RTDs).
Industrial Furnaces: Widely used in industrial heating elements for applications involving high heat or thermal cycling.

Advantages of NiCr Alloy Wire (Cr30Ni70, NiCr7030, ХН70Ю):

High-Temperature Stability: Performs reliably at elevated temperatures up to 1100°C (2012°F).
Oxidation and Corrosion Resistance: Ensures durability and longevity in high-temperature, corrosive environments.
Electrical Stability: Offers stable electrical resistivity, ideal for heating elements and resistors.
Weldability and Fabrication: Easily processed into wires and welded for various industrial applications.
Durable and Long-Lasting: Suitable for demanding applications that require high mechanical strength and resistance to thermal stress.

Limitations of NiCr Alloy Wire (Cr30Ni70, NiCr7030, ХН70Ю):

Cost: Higher cost compared to regular metals due to its specialized properties and composition.
Limited Resistance to Strong Acids: Although it is resistant to oxidation and sulfidation, it may not perform well in highly acidic or chloride-rich environments compared to other alloys like Inconel.
Work Hardening: The alloy may harden when cold-worked, which can require additional processing steps for machining.

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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