Kanthal® DT

Ribbon (flat wire)Datasheet

Datasheet updated 2021-02-04 13:40 (supersedes all previous editions)

Disclaimer: Recommendations are for guidance only, and the suitability of a material for a specific application can be confirmed only when we know the actual service conditions. Continuous development may necessitate changes in technical data without notice. This datasheet is only valid for materials under the trademark Kanthal^®.

Kanthal^® DT is a ferritic iron-chromium-aluminium (FeCrAl) alloy particularly suitable for applications using close wound coils. The grade is characterized by a highly adherent and dense surface oxide that prevents short circuiting between adjacent coil turns.

A typical application for Kanthal^® DT is as electrical resistance element, in ribbon form, in cigar lighter coils in automobiles.

Chemical composition

	C %	Si %	Mn %	Cr %	Al %	Fe %
Nominal composition					5.1	Bal.
Min	-	-	-	20.5	-
Max	0.08	0.7	0.5	23.5	-

Mechanical properties

Thickness	Yield strength	Tensile strength	Elongation	Hardness
	R_p0.2	R_m	A
mm	MPa	MPa	%	Hv
0.15	555	720	15	225

Mechanical properties at elevated temperature
Temperature °C	900
MPa	34

Ultimate tensile strength - deformation rate 6.2 x 10 -2 min -1

Creep strength - 1% elongation in 1000 h
Temperature °C	800	1000
MPa	1.2	0.5

Physical properties

Density g/cm³	7.25
Electrical resistivity at 20°C Ω mm²/m	1.37
Poisson's ratio	0.30

Young's modulus
Temperature °C	20	100	200	400	600	800	1000
GPa	220	210	205	190	170	150	130

Temperature factor of resistivity
Temperature °C	100	200	300	400	500	600	700	800	900	1000	1100	1200	1300
Ct	1.00	1.01	1.01	1.02	1.03	1.04	1.05	1.06	1.07	1.07	1.07	1.08	1.08

Coefficient of thermal expansion
Temperature °C	Thermal Expansion x 10^-6/ K
20 - 250	11
20 - 500	12
20 - 750	14
20 - 1000	15

Thermal Conductivity
Temperature °C	50	600	800	1000	1200
W m^-1 K^-1	11	20	22	26	27

Specific heat capacity
Temperature °C	20	200	400	600	800	1000	1200
kJ kg^-1 K^-1	0.46	0.56	0.63	0.75	0.71	0.72	0.74

Melting point °C	1500
Max continuous operating temperature in air °C	1300
Magnetic properties	The material is magnetic up to approximately 600°C (Curie point).
Emissivity - fully oxidized material	0.70