Alumina Thermocouple Protection Tubes
	Outside Dia mm	Inside Dia mm	Max. Length mm	85%	95%	99.35%  99.5%  99.8%
AY-APT25	25	19	2000
AY-APT20	20	14	2000
AY-APT16	16	12	2000
AY-APT14	14	10	1500
AY-APT12	12	8	1200
AY-APT10	10	7	1000
AY-APT 8	8	5	1000
AY-APT 6	6	4	1000
		Both Ends Open
AY-AT822	8	2 holes ￠2mm	2000

TYPICAL PHYSICAL PROPERTIES
AL2O3      %Composition	60	75	80	85	92	95	99	99.8
Density（g/cm3）	3.0	3.1	3.3	3.4	3.6	3.7	3.81	3.91
Flexural Strength(MPa)	205	280	215.7	230	312	304	340	370
Thermal Expansion (×10-6/℃) （25-800℃）	7.1	7.6	7.6	7.6	7.5	7.3	7.6	7.6
Thermal Conductivity [w/(m.R)]	16	17	17	17	18	20	34	35
Dielectric Strength  (KV/mm)	10	10	10	10	10	10	10	10
Resistivity (Ω.cm) 20℃	＞1014	＞1014	＞1014	＞1014	＞1014	＞1014	＞1014	＞1014
300℃	＞1013	＞1013	＞1013	＞1013	＞1013	＞1012	＞1010	＞1010
Max. Service Temp.	1350℃	1100℃	1300℃	1350℃	1500℃	1600℃	1700℃	1800℃
Hardness (Moh'sscale)	7.5	7.5	7.5	7.5	8.5	8.8	9	9
耐火度	1800	1700	1800	1850	1920	2000	2030	2040