Product Details

Fecral Model OCr21Al6Nb 4*0.4mm hudrogen annealing flat wire made in China

The products have many advantages, such as deformation ability, thermal stability, mechanical character, shockproof ability in thermal state and anti-oxidization. They are widely used in electric furnace heating or heat-treating processes in the chemical, mechanical, metallurgical and defense industries. They can also be used in making resistance element of various precision wire-wound resistance, sliding resistance,potentionmeter.

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 20º C(μ Ω · 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· º C)		52.7	46.1	63.2	60.2	46.9	46.1
Coefficient of lines expansion(α × 10-6/º C)		15.4	16.0	14.7	15.0	13.5	16.0	16.0
Melting point approx. ( º C)		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/ º C)		--	≥ 80/1300	≥ 80/1300	≥ 80/1300	≥ 80/1250	≥ 50/1350	≥ 50/1350
Micrographic structure		Ferrite	Ferrite	Ferrite	Ferrite	Ferrite	Ferrite	Ferrite
Magnetic properties		Magnetic	Magnetic	Magnetic	Magnetic	Magnetic	Magnetic	Magnetic