FeCrAl alloy steel wire in coil

FeCrAl alloy steel wire in coil    1. Using high temperature in the atmosphere oCR27A17MO2 alloy of electric Fe-Cr-Al can be used up to 1400°C, while CR20NI80 alloy of electric Ni-Cr alloy can be usedup to 1200°C. 2. Using longer Using the same high temperature in the atmosphere, Fe-Cr-Al components can be used longer as 2 to 4 times as Ni-Cr components. 3. High load on the surface Fe-Cr-Al componentscan sustain high load on the surface because of its using high temperature and long-life usage. 4. Sound antioxidant Al203 oxide film generated on the surfaceof Fe-Cr-Al alloy is structure-compact and well adhesion with matrix, and melting point of Al203 determine Al203 oxide film excellent antioxiadnt. Carburization resistance is higher than Cr203 generated on the same components. 5. Low weight The weight of Fe-Cr-Al alloy is lower than Ni-Cr alloy, which means that using Fe-Cr-Al saves more materials than using Ni-Cr when production tha same components. 6. High resistivity The resistivity of Fe-Cr-Al alloy is higher than that of Ni-Cr alloy. In designing components, using large specification alloy is advanageous for prolonging its life, which is very inportant for narrow alloy wire, such as choosing materialswith the same specification, the higher resistivity the less material, the smaller place  occupied in furnace. 7. Excellent anti-sulfur Fe-Cr-Ali can resist corrosion for sulfur atmosphere and material contamination, but Ni-Cr will will be subjsct to severe erosion.   Products details 1. Grade: 1Cr13Al4 1Cr21Al4  OCr21Al6  OCr23Al5  OCr25Al5  OCr21Al6Nb  OCr27Al7Mo2 2. Specification:            Silk material:0.05---10mm            Strip:(0.05--0.1)×(5--250)mm            Bars: 12--30mm            Flat wire:0.025×(0.4--4)mm   Alloy trademark, composition and performance:  

Alloy Nomenclature Performance		1Cr13Al4	0Cr25Al5	0Cr21Al6	0Cr23Al5	0Cr21Al4	0Cr21Al6Nb	0Cr27Al7Mo2
Main Chemical composition	Cr	12.0-15.0	23.0-26.0	19.0-22.0	20.5-23.5	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	4.2-5.3	3.0-4.2	5.0-7.0	6.0-7.0
	Re	opportune	opportune	opportune	opportune	opportune	opportune	opportune
	Fe	Rest	Rest	Rest	Rest	Rest	Rest	Rest
							Nb0.5	Mo1.8-2.2
Max. continuous service temp. of element(°C)		950	1250	1250	1250	1100	1350	1400
Resistivity at 20ºC(μΩ·m)		1.25	1.42	1.42	1.35	1.23	1.45	1.53
Density(g/cm3)		7.40	7.10	7.16	7.25	7.35	7.10	7.10
Thermal conductivity(KJ/m·h·ºC)		52.7	46.1	63.2	60.2	46.9	46.1
Coefficient of lines expansion(α×10-6/ºC)		15.4	16.0	14.7	15.0	13.5	16.0	16.0
Melting point approx.( ºC)		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 at rupture(%)		>16	>12	>12	>12	>12	>12	>10
Variation of area(%)		65-75	60-75	65-75	65-75	65-75	65-75	65-75
Repeat Bending frequency(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
continuous servicetime(Hours/ ºC)		--	≥80/1300	≥80/1300	≥80/1300	≥80/1250	≥50/1350	≥50/1350
Magnetic properties		Magnetic	Magnetic	Magnetic	Magnetic	Magnetic	Magnetic	Magnetic