Brown Fused Alumina with Middle Temperature Treatment
This kind of Brown Fused Alumina grains is calcined at the high temperature, and with the anneal treatment.It is characterized by very low coefficient of linear expansion,very good hydrophilicity, good toughness and high hardness, producing the sintered grinding tools that is characterized by deep blue color after firing, without resillage, without rust and so on. So our this kind of product increase the precision and grinding ability of the grinding tools in the using course. Brown Fused Alumina with middle temperature treatment is applicable to make high quality bonded abrasives.
Chemical Composition
Purpose Specification Chemical composition Magnetic material content
Al2O3 Fe2O3 SiO2 TiO2
For abrasive F 48 0 95.0 Min 0.3 Max 1.5 Max 3.0 Max 0.05 Max
90 150 94.0 Min 0.03 Max
180 240 93.0 Min 0.3 Max 1.5 Max 3.0 Max 0.02 Max
Physical Properties
Color Cambridge Blue
Crystal Form Alpha alumina trigonal system
Hardness 9.0 Mohs scale
Melting Temperature About 2050
Maximum Use Temperature 1800
True Density g cm3 3.90
Magnetic Material 0.0082
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Industry - Defense. Outer Shell - 100% Nylon 66, 150 GSM FR Treatment Optional Camouflage printing. Middle Layer - Activated Carbon Fabric with nanopore structure. Inner Layer / Lining - Cotton: Polyester blend with Antimicrobial Treatment Cotton : Viscose blend with Antimicrobial Treatment. Size - XS to 5XL (ASIA) 34 to 60 (US) 34R to 60R (UK) 44 to 70 (EU).
Industry - Welding, Oil & Gas, Petrochemicals, Electrical etc. Shell Composition - GDI32 - Modacrylic:Cotton:P-Aramid:Antistatic, IFR, 180 GSM GDI49 - Modacrylic:FR Viscose:M-Aramid:Antistatic (IFR), 230-300 GSM GDI37 - Cotton:Antistatic with FR Treatment, 240 to 350 GSM. Quilting - Middle Layer - Normal wadding or FR wadding as per needs Inner Layer - Normal lining or FR lining as per needs. Size - XS to 5XL (ASIA) 34 to 60 (US) 34R to 60R (UK) 44 to 70 (EU). Safety Performance - General :- EN ISO 13688, EN ISO 20471, ISO 15797 Arc :- EN 14116, EN 11611, EN 11612, NFPA 2112 Fire :- EN 61482, EN 1149, NFPA 70E.
Industry - Fire fighting. Outer Shell - GDI86A - 100% Para Aramid Aluminised (Inherent FR) GDI86F - 100% Fiberglass Aluminised (Inherent FR). Middle Layer - Optional use of GDI89 - Thermal / Moisture Barrier. Inner Layer / Lining - GDI33 - 93% Meta-Aramid 5% Para- Aramid 2% Antistatic (Inherent FR), 150 GSM GDI32 - Modacrylic Cotton Para Aramid Antistatic, 180 GSM GDI36 - 100% Cotton with FR Treatment, 240 GSM. Size - XS to 5XL (ASIA) 34 to 60 (US) 34R to 60R (UK) 44 to 70 (EU). Safety Performance - EN-ISO 13688, EN-ISO 20471, EN-14116, EN-11611, EN-11612, EN-61482, EN-1149, EN 1486, NFPA 70E, NFPA 1971, NFPA 2112.
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