Specifications Main Chemical Composition

Cr : 21~23%

Al : 5~7%

Fe : Balance%

Mn :<=0.7%

Fe-Cr-Al???????????????Main performance of Fe-Cr-Al electric heating alloys
??????? Grade???????????????????????????????????????? property performance		1Cr13Al4	0Cr21Al4	0Cr25Al5	0Cr21Al6	0Cr21Al6Nb	0Cr27Al7Mo2	0Cr23Al5
?% Main Chemical Composition???	Cr	12~15	17~21	23~26	19~22	21~23	26.5~27.8	20.5~23.5
	Al	4~6	2~4	4.5~5.5	5~7	5~7	6~7	4.2~5.3
	Fe	Balance	Balance	Balance	Balance	Balance	Balance	Balance
	Mn	≤0.7	≤0.7	≤0.7	≤0.7	≤0.7	≤0.2	≤0.7
	Nb	—	—	—	—	0.5	—	—
?°C Max contimnous service Temp. of element????????		950	1100	1250	1250	1350	1400	1250
Resistivity mm2/m??		1.25±0.08	1.23±0.06	1.42±0.07	1.42±0.07	1.45±0.07	1.53±0.07	1.35±0.06
10-5/°C Temp coeff of resistance		15	5	5	5	5	-1	5
g/cm3 Density????		7.4	7.35	7.1	7.1	7.1	7.1	7.25
Melting point≈ °C (approxi)		1450	1500	1500	1500	1510	1520	1500
Tensile strength N/mm2		588~735	637~784	637~784	637~784	637~784	686~784	637~784
% Elongation?????????????		>16	>14	>12	>12	>12	>12	>12
% Reducation of Area		65~75	65~75	65~75	65~75	65~75	65~75	65~75
Hardness(HB)		200~260	200~260	200~260	200~260	200~260	200~260	200~260
Micrograhic structure??????		Free Ferrite	Free Ferrite	Free Ferrite	Free Ferrite	Free Ferrite	Free Ferrite	Free Ferrite
Magnetic property		Magnetic	Magnetic	Magnetic	Magnetic	Magnetic	Magnetic	Magnetic

? ? ? ????????? ??????????????????????????????? ??????????????????????????????????????????????????????????????????????????????????????????????????? ? ? ?????????????????? ? ? ? ? ??? ? ? ????????????