Fecralloy Properties

PHYSICAL AND MECHANICAL PROPERTIES

Fe-Cr-Al alloys i.e. Ferritic stainless steel with aluminium	Fecralloy	Fecralloy 145	Fecralloy 135	Resistalloy 134
Form	Wire Strip Bar Tube	Wire	Wire Strip Bar	Wire Strip
Maximum Operating Temperature (element temperature in air) (C (F Nominal composition % Cr Al Y Fe	1400 2550 22 5.3 Addition Bal	1400* 2550 22 5.8 - Bal	1300 2370 22 4.8 - Bal	1100 2010 15 4.3 - Bal
Density, g/cm³ lb/in³ Electrical Resistivity at 20^oC Ω mm²m-1 at 68^oF Ω /cmf Temperature factor of the resistivity, ^oC 600^oC - 1112^oC 800^oC - 1470^oC 1000^oC - 1830^oC 1200^oC - 2190^oC	7.15 0.259 1.39 836 1.04 1.05 1.06 1.06	7.10 0.256 1.45 872 1.02 1.03 1.04 1.04	7.25 0.262 1.35 812 1.04 1.06 1.07 1.08	7.28 0.263 1.25 755 1.08 1.10 1.11 -
Coefficiency of thermal expansion K1 20 - 250^oC 68 - 480^oF 20 - 500^oC 68 - 930^oF 20 - 750^oC 68 - 1380^oF 20 - 1000^oC 68 - 1830^oF	11. 10-6 12. 10-6 14. 10-6 15. 10-6	11. 10-6 12. 10-6 14. 10-6 15. 10-6	11. 10-6 12. 10-6 14. 10-6 15. 10-6	11. 10-6 12. 10-6 14. 10-6 15. 10-6
Thermal conductivity at 20^oC Wm¹ K¹ 68^oF, Bru in fr²h¹⁰F¹	16 111	16 111	16 111	16 111
Specific heat capacity, kJ kg¹,K¹ 20^oC/ Bru lb¹F¹, 68^oF	0.46 0.110	0.46 0.110	0.46 0.110	0.46 0.115
Melting Point (approx) ^oC, ^oF	1500 2730	1500 2730	1500 2730	1500 2730
Mechanical properties (approx)** Tensile strength, N mm² Yield point, N mm² Hardness (approx) Hv Elongation at rupture % Tensile strength at 900^oC (N/mm²⁾ Creep strength (1 % elongation in 1000h) at 1000^oC (MPa) at 1100^oC (MPa) Magnetic properties	700 500 230 23 37 - 0.7 Magnetic (Curie point approx 600^oC 1100^oF)	680 545 240 20 34 0.5 - Magnetic (Curie point approx 600^oC 1100^oF)	670 485 230 22 34 0.5 - Magnetic (Curie point approx 600^oC 1100^oF)	630 455 220 22 30 0.5 - Magnetic (Curie point approx 600^oC 1100^oF)
Emissivity, E,fully oxidised condition	0.70	0.70	0.70	0.70

* For maximum life of an element above 1300 deg C, Fecralloy 145 is recommended, due to the thicker oxide layer/higher aluminium content

** Mechanical Properties based on 2.0mm wire. Finer Wire below 1.0mm will exhibit up to 10% higher tensile strength, and above 5.0mm diameter slightly lower strength

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Fecralloy Properties

PHYSICAL AND MECHANICAL PROPERTIES

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