0Cr21Al6Nb resistance wire

Features:: 0Cr21Al6Nb is the "high-performance version" of FeCrAl alloys. By adding niobium, it overcomes the three major drawbacks of traditional FeCrAl alloys: low high-temperature strength, easy sagging, and poor resistance to reducing atmospheres. It significantly improves the alloy's stability in reducing or low-oxygen-pressure atmospheres and enhances its outstanding resistance to 'green rot,' making it suitable for atmosphere-controlled heat treatment furnaces (like bright annealing furnaces), which ordinary 0Cr25Al5 struggles with. Although the cost and processing difficulty are slightly higher, under harsh conditions such as ultra-high temperatures above 1300°C, horizontal installations, or atmosphere-controlled furnaces, it’s currently the most cost-effective choice and can often replace expensive nickel-chromium alloys while offering a longer service life.; 0Cr21Al6Nb Resistance Wire is also known as Kanthal A-1, Aluchrom O, Alchrome 875, Alloy 875, Icralloy 25, Resistohm 145, Alferon 25, MWS-875, Stablohm 875 etc.
Specifications:: Bright and soft annealed finish: 0.05 - 1.6mm; Acid-pickled or oxidation finish: 1.0 -12.0mm; Golden color: 1.0-3.9mm; Blue color: 4.0-10.0mm; Rods: 6.0-150.0mm
Flat wires: width 0.2 - 6.0mm and thickness 0.08 - 1.0mm; Strips: width 5.0 - 300mm and thickness 0.05 - 4.0mm

Product Description

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Chemical Composition:

C	P	S	Mn	Si	Cr	Ni	Al	Fe	Nb
≤				Si	Cr	Ni	Al	Fe	Nb
0.05	0.025	0.02	0.5	≤0.6	21.0~23.0	≤0.6	5.0~7.0	Remainder	0.5

Physical Properties:

Max. Operating Temp.	1350ºC	Resistivity at 20ºC( μΩ·m)	1.45±0.07
Density	7.10 g/cm³	Thermal conductivity(20ºC)	13 W/(m·K)
Average linear expansion coefficient(20-1000ºC)	16.0×10^-6/ºC	Specific heat capacity	0.49 J/(g·K)
Approx. melting point	1510ºC	Elongation after Fracture (A/%)	Diameter≤3.0mm: ≥10% Diameter>3.0mm: ≥12%
Tensile strength(R_m/MPa)	≥650	Accelerated life test	≥50h/1350ºC
Micrographic structure	Ferrite	Magnetic properties	Magnetic

Technical Parameters:

Diameter (mm)	Ohm per meter (20ºC Ω/m)	Length per kg (m/kg)	Weight per meter (g/m)	Diameter (mm)	Ohm per meter (20ºC Ω/m)	Length per kg (m/kg)	Weight per meter (g/m)
0.05	738.480	71731.87	0.01394	1.1	1.5258	148.21	6.74735
0.06	512.833	49813.80	0.02007	1.2	1.2821	124.53	8.02990
0.07	376.775	36597.89	0.02732	1.3	1.0924	106.11	9.42398
0.08	288.469	28020.26	0.03569	1.4	0.9419	91.49	10.92959
0.09	227.926	22139.46	0.04517	1.5	0.8205	79.70	12.54673
0.1	184.620	17932.97	0.05576	1.6	0.7212	70.05	14.27538
0.11	152.578	14820.63	0.06747	1.7	0.6388	62.05	16.11557
0.12	128.208	12453.45	0.08030	1.8	0.5698	55.35	18.06728
0.13	109.243	10611.22	0.09424	1.9	0.5114	49.68	20.13052
0.15	82.053	7970.21	0.12547	2.0	0.4615	44.83	22.30529
0.17	63.882	6205.18	0.16116	2.2	0.3814	37.05	26.98940
0.19	51.141	4967.58	0.20131	2.4	0.3205	31.13	32.11962
0.21	41.864	4066.43	0.24592	2.6	0.2731	26.53	37.69594
0.25	29.539	2869.27	0.34852	2.8	0.2355	22.87	43.71837
0.27	25.325	2459.94	0.40651	3.0	0.2051	19.93	50.18690
0.29	21.952	2132.34	0.46897	3.2	0.1803	17.51	57.10154
0.31	19.211	1866.07	0.53588	3.4	0.1597	15.51	64.46229
0.35	15.071	1463.92	0.68310	3.6	0.1425	13.84	72.26914
0.40	11.539	1120.81	0.89221	3.8	0.1279	12.42	80.52209
0.45	9.117	885.58	1.12921	4.0	0.1154	11.21	89.22116
0.50	7.385	717.32	1.39408	4.5	0.0912	8.86	112.92053
0.55	6.103	592.83	1.68684	5.0	0.0738	7.17	139.40806
0.60	5.128	498.14	2.00748	5.5	0.0610	5.93	168.68375
0.65	4.370	424.45	2.35600	6.0	0.0513	4.98	200.74760
0.70	3.768	365.98	2.73240	6.5	0.0437	4.24	235.59962
0.80	2.885	280.20	3.56885	7.0	0.0377	3.66	273.23979
0.85	2.555	248.21	4.02889	7.5	0.0328	3.19	313.66813
0.90	2.279	221.39	4.51682	8.0	0.0288	2.80	356.88462
0.95	2.046	198.70	5.03263	8.5	0.0256	2.48	402.88928
1.00	1.846	179.33	5.57632	9.0	0.0228	2.21	451.68210

The above parameters are based on Chinese National Standard GB/T1234-2012. The tolerance of resistance per meter: 0.03-0.06mm is ±10%; 0.07-0.12mm is ±8%; 0.13-0.17mm is ±7%; 0.18-0.32mm is ±6%; A wire diameter above 0.32mm is ±5%. We provide the Iron-Chromium-Aluminium alloy products in various forms, like the wires, strips and rods. Other alloys like 0Cr23Al5, 0Cr25Al5, 0Cr20Al3, 0Cr20Al6RE, 1Cr13Al4 and 0Cr27Al7Mo2 are also available upon request.

0Cr21Al6Nb Datasheet Download