Eleatric Heating Alloy Wires Heating Resistance Wires

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Eleatric Heating alloy

Iron-chromium-aluminium (FeCrAl) alloys

Iron-chromium-aluminium (FeCrAl) alloyshave approximately the same basis composition: 12 to 28 % of chromium, 4.0 to 7 % of aluminum, balance being iron.Some of alloys contain rare molybdenum, niobium,silicium and so on. The alloy has the characteristics of high resistivity,low temperature coefficient and high temperature resistance. Also it has a good corrosion resistance at high temperature, and the price is much cheaper than Nickel chrome wire.So they are an ideal heating material used in industrial furnaces, household appliances and far-infrared devices.

Chemical Composition and Main Property of Fe-Cr-Al Resistance Alloy
Properties \Grade			1Cr13Al4	0Cr25Al5	0Cr21Al6	0Cr23Al5	0Cr21Al4	0Cr21Al6Nb	0Cr27Al7Mo2
Main Chemical Composition (%)	Cr	12.0-15.0		23.0-26.0	19.0-22.0	22.5-24.5	18.0-21.0	21.0-23.0	26.5-27.8
	Al	4.0-6.0		4.5-6.5	5.0-7.0	4.2-5.0	3.0-4.2	5.0-7.0	6.0-7.0
	Re	-		-	-	-	-	-	-
	Fe	Rest		Rest	Rest	Rest	Rest	Rest	Rest
								Nb0.5	Mo1.8-2.2
Max Work Temp(?)			950	1250	1250	1250	1100	1350	1400
Resisivity 20?(Omm2/m)			1.25±0.08	1.42±0.06	1.42±0.07	1.35±0.07	1.23±0.07	1.45±0.07	1.53±0.07
Density(g/cm3)			7.4	7.1	7.16	7.25	7.35	7.1	7.1
Coefficient of Thermal Expansion(a×10-6/?)			15.4	16	14.7	15	13.5	16	16
Melting Point(?)			1450	1500	1500	1500	1500	1510	1520
Tensile Strength (N/mm2)			580-680	630-780	630-780	630-780	600-700	650-800	680-830
Elongation(%)			>16	>12	>12	>12	>12	>12	>10
Section Variation Shrink Rate(%)			65-75	60-75	65-75	65-75	65-75	65-75	65-75
RepeatedlyBendFrequency(F/R)			>5	>5	>5	>5	>5	>5	>5
Hardness (H.B.)			200-260	200-260	200-260	200-260	200-260	200-260	200-260
Micrographic Structure			Ferrite	Ferrite	Ferrite	Ferrite	Ferrite	Ferrite	Ferrite
Magnetic Property			Magnetic	Magnetic	Magnetic	Magnetic	Magnetic	Magnetic	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