The GT grate of graphite Felt is one kind of the economical-type insulation material in our company. He can be widely used in any kind of the General Heat Treatment Furnace, whose temperature is lower than 1600. Avalilable Sizes & Dimensions Thickness Width Length 300mm(max) 1200mm(max) 1520mm(max) Chemical Composition Bulk density g/cm³ í_0.28 Bending strength MPa 2.5-3.2 Thermal Conductivity at 20íµ w/mk 0.32 Thermal Conductivity at 1000íµ w/mk 0.46 Tensile strength MPa 2.8-6.8 Carbon content % í¦98 Plainness mm/meter +4.0