Kanthal APM	Kanthal A-1	Kanthal AF	Kanthal D
Max continuous
Operating temp., °C	1425	1400	1300	1300
°F	2600	2550	2370	2370
Nominal composition, % Cr	22	22	22	22
Al	5.8	5.8	5.3	4.8
Fe	Rest	Rest	Rest	Rest
Ni	-	-	-	-
Resistivity at 20°C, mm-2 m-1	1.45	1.45	1.39	1.35
at 68°F, /cmf	872	872	836	812
Density, g/cm3	7.10	7.10	7.15	7.25
lb/in3	0.256	0.256	0.259	0.262
Coefficient of thermal expansion, K-1
20-750°C, 68-1380°F	14.10-6	14.10-6	14.10-6	14.10-6
20-1000°C, 68-1838°F	15.10-6	15.10-6	15.10-6	15.10-6
Thermal Conductivity at 20°C
W m-1 K-1	13	13	13	13
68°F, Btu in ft-2 h-1 °F-1	90	90	90	90
Specific heat capacity
KJ kg-1K-1,20°C	0.46	0.46	0.46	0.46
Btu Ib-1 °F-1, 68°F	0.110	0.110	0.110	0.110
Melting point, °C	1500	1500	1500	1500
°F	2730	2730	2730	2730
Mechanical properties (approx.)
Tensile strength, N mm-2	680	680	680	680
psi	99000	99000	99000	99000
Yield point, N mm-2	445	445	445	445
psi	65000	65000	65000	65000
Hardness, Hv	230	230	230	230
Elongation at rupture, %	19	19	19	19
Tensile strength at 900°C, Nmm-2	40	34	37	34
1650°F, psi	5800	5000	5400	5000
Creep strength at 800°C, Nmm-2	14	6	8	6
1000°C, Nmm-2	1.8	1	1.5	1
1470°F, psi	2000	870	1160	870
1830°F, psi	260	145	215	145
Magnetic properties	Magnetic (Curie point 600°C 1100°F)
Emissivity, fully oxidized condition	0.70	0.70	0.70	0.70