Nickel-chromium (NiCr) Wires Alloys

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Superb Heater Technology has been focused on the production of nickel-chromium (nicr) alloys since 1985, which is well-known as one of the leading manufacturers and suppliers of nickel-chromium (nicr) alloys. In the past years, we owned strong reputation for the high quality, reliable performance and strong durability of our products. Should you are interested, please feel free to contact our factory.

Eleatric Heating alloy

Nickel-chromium (NiCr) alloys

Nickel-chromium (NiCr) alloys' chemical composition is nickel,chromium and ferrum, it used at operating temperatures up to 1200 degree. Its chemical composition gives good oxidation resistance especially under conditions of frequent switching or wide temperature fluctuations.They are used for electric resistances of appliances or for application of industrial furnaces. Compare to ferrtic alloy, it has better resistance to oxidation,low embrittlement at high temperature, good plasticity (easier to give them a shape compared with FeCrAl. But the price is very more expensive than FeCrAl alloy.

Chemical Composition and Main Properties of Nickel-chromium (NiCr) alloys

Chemical Composition and Main Properties of Nickel-chromium (NiCr) alloys
Properties / Grade			NiCr 80/20		NiCr 70/30	NiCr 60/15	NiCr 35/20	NiCr 30/20
Main Chemical Composition(%)	Ni	Rest			Rest	Rest	34.0-37.0	30.0-34.0
	Cr	20.0-23.0			28.0-31.0	15.0-18.0	18.0-21.0	18.0-21.0
	Fe	=1.0			=1.0	Rest	Rest	Rest
Max Work Temp(?)				1200	1250	1150	1100	1100
Resisivity 20(Omm2/m)				1.09	1.18	1.12	1.04	1.04
Density(g/cm3)				8.4	8.1	8.2	7.9	7.9
ThermalConductivity(KJ/m·h·?)				60.3	45.2	45.2	43.8	43.8
Coefficient of Thermal Expansion(a×10-6/?)				18	17	17	19	19
Melting Point(?)				1400	1380	1390	1390	1390
Elongation(%)				>20	>20	>20	>20	>20
Micrographic Structure				austenite	austenite	austenite	austenite	austenite
Magnetic Property				nonmagnetic	nonmagnetic	nonmagnetic	Weak magnetic	Weak magnetic

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A series of Ni-Cr,Ni-Cr-Fe alloys with their diameters and characteristics (Conversion Table)

Dia mm	Cross sectional area Mm2	Weight per Meter(kg/m)					Resistance per meter at 20?(O/m)
		OCr13Al4	OCr25Al5 OCr21Al6 OCr21Al6Nb OCr27Al7MO2	Cr15Ni60	Cr20Ni80	Cr20Ni30	OCr13Al4	OCr25Al5 OCr21Al6	OCr27Al7 MO2	OCr21Al6 Nb	Cr15Ni60	Cr20Ni80	Cr20Ni30
0.1	0.0079	0.00006	0.00006	0.00006	0.00007	0.00006	160.4	178.3	191	183.5	131.6	140.1	141.3
0.2	0.0314	0.00023	0.00022	0.00026	0.00026	0.00025	40.13	44.59	44.77	46.17	33.12	35.01	35.33
0.3	0.0707	0.00052	0.0005	0.00058	0.00059	0.00056	17.82	19.8	21.22	20.5	14.71	15.56	15.7
0.4	0.01257	0.00093	0.00089	0.00103	0.00106	0.00099	10.02	11.14	11.93	11.53	8.27	8.75	8.83
0.5	0.1964	0.0015	0.0014	0.00161	0.00165	0.0016	6.416	7.128	7.638	7.382	5.295	5.604	5.655
0.6	0.2827	0.0021	0.002	0.00232	0.00237	0.0022	4.457	4.952	5.306	5.129	3.678	3.891	3.926
0.8	0.5027	0.0037	0.0036	0.00412	0.00422	0.0039	2.507	2.785	2.984	2.884	2.068	2.188	2.208
1	0.7854	0.0058	0.0056	0.0064	0.0066	0.0062	1.604	1.872	1.91	1.846	1.324	1.401	1.413
1.2	1.131	0.0084	0.008	0.0092	0.0095	0.0089	1.114	1.238	1.326	1.282	0.919	0.972	0.9814
1.4	1.539	0.011	0.011	0.0126	0.0129	0.0122	0.8187	0.9097	0.9747	0.9421	0.6757	0.7147	0.7212
1.6	2.011	0.015	0.014	0.0164	0.0169	0.0159	0.6266	0.6962	0.7459	0.721	0.5171	0.547	0.522
1.8	2.545	0.019	0.018	0.0209	0.0214	0.0201	0.4951	0.5501	0.5894	0.5697	0.4086	0.4322	0.4361
2	3.142	0.023	0.22	0.0257	0.0264	0.0248	0.401	0.4456	0.4775	0.4614	0.3309	0.3501	0.3533
2.2	3.801	0.028	0.027	0.0312	0.0319	0.03	0.3315	0.3683	0.3946	0.3814	0.2736	0.2894	0.292
2.4	4.524	0.033	0.032	0.037	0.038	0.036	0.2785	0.3095	0.3316	0.3205	0.2298	0.2431	0.2454
2.6	5.309	0.039	0.038	0.044	0.045	0.042	0.2373	0.2637	0.2825	0.2731	0.1958	0.2027	0.2091
2.8	6.158	0.046	0.044	0.05	0.052	0.049	0.2046	0.2273	0.2436	0.2354	0.1688	0.1786	0.1803
3	7.069	0.052	0.05	0.058	0.059	0.056	0.1782	0.198	0.2122	0.2051	0.1471	0.1556	0.157
3.2	8.043	0.06	0.057	0.066	0.068	0.064	0.1576	0.1741	0.1856	0.1802	0.1293	0.138	0.1386
3.5	9.621	0.071	0.068	0.079	0.081	0.076	0.131	0.1455	0.1559	0.1507	0.108	0.1143	0.1154
4	12.57	0.093	0.089	0.103	0.105	0.099	0.1002	0.1114	0.1193	0.1153	0.0827	0.0875	0.0883
4.5	15.9	0.118	0.113	0.13	0.134	0.126	0.0792	0.0881	0.0943	0.0911	0.0654	0.0691	0.0698
5	19.64	0.145	0.139	0.161	0.165	0.155	0.0642	0.0713	0.0764	0.0738	0.0529	0.056	0.0565
5.5	23.76	0.175	0.168	0.195	0.199	0.188	0.053	0.0589	0.0631	0.061	0.0437	0.0463	0.0467
6	28.27	0.209	0.201	0.232	0.237	0.223	0.0446	0.0495	0.0531	0.0512	0.0367	0.0389	0.0396
6.5	33.17	0.245	0.235	0.272	0.279	0.262	0.0376	0.0428	0.0461	0.0437	0.0313	0.034	0.0343
7	38.48	0.284	0.273	0.315	0.323	0.303	0.0327	0.0364	0.039	0.0376	0.027	0.0293	0.0296
8	50.24	0.371	0.36	0.36	0.422	0.397	0.0248	0.0282	0.0304	0.0288	0.0207	0.0224	0.0226

Temperature Factor of the Resistivity

Grade	20?	100?	200?	300?	400?	500?	600?	700?	800?	900?	1000?	1100?	1200?
1Cr13A14	1	1.005	1.014	1.028	1.044	1.064	1.09	1.12	1.132	1.164	1.172	1.18	1.186
0Cr25A15	1	1.002	1.005	1.008	1.013	1.021	1.03	1.038	1.04	1.042	1.044	1.049	1.047
0Cr21A16	1	1	1.002	1.006	1.011	1.02	1.037	1.043	1.046	1.049	1.052	1.055	1.058
0Cr21A16Nb	1	0.997	0.996	0.994	0.991	0.99	0.99	0.99	0.99	0.99	0.99	0.99	0.99
0Cr27A17Mo2	1	0.992	0.986	0.981	0.978	0.976	0.974	0.972	0.97	0.969	0.968	0.968	0.967
Cr20Ni80	1	1.006	1.012	1.018	1.025	1.026	1.018	1.01	1.008	1.01	1.014	1.021	1.025
Cr15Ni60	1	1.011	1.024	1.038	1.052	1.064	1.069	1.073	1.078	1.088	1.095	1.109
Cr20Ni30	1	1.023	1.052	1.079	1.103	1.125	1.141	1.158	1.713	1.187	1.201	1.214	1.226