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      C-4500 - Carbon Fibers And Special Heat-Resistant Additive Sheets With Nitrile Binder

      Technical Sheet

      APG's C-4500 - Carbon Fibers and Special Heat-Resistant Additive Sheets with Nitrile Binder is a premium grade, high-pressure gasket material designed for use in high-temperature alkaline media and superheated steam. 

      C-4500 is a superior performance material suitable in the pulp and paper industry and the chemical industry. This material is manufactured with carbon fibers and special heat-resistant additives and reinforced with a nitrile binder.      		 4500b

      Benefits & Features

      Benefits

      • Suitable for high temperature alkaline media

      • Suitable for superheated steams

      Features

      • Utilization of carbon fibers

      • Heat resistant additives

      • Resistant to creep and cold flow

      • Dimensionally stable

      Product Specifications

      Typical Values Refer to 1/16'' Thick Material Unless Noted

      Creep relaxation ASTM F38B (1/32") 20 %
      Sealability ASTM F37A (1/32") < 0.3 ml/hr
      Gas Permeability DIN 3535/6 < 1.0 ml/min
      Compressibility ASTM F36J 8 - 14 %
      Recovery ASTM F36J 50 % minimum
      KLINGER Hot Compression Test  
      1 Thickness Decrease 73°F (23°C) 1 12 % initial
      2 Thickness Decrease 572° F (300°C) 2 10 % additional
      Weight increase ASTM F146 after immersion in  
      Fuel B, 5h/73°F (23°C)
      		 10 % maximum
      Thickness Increase ASTM F146 after immersion in  
      1 ASTM Oil IRM 901, 5h/300°F (149°C)  1 0 - 5 % 
      2 ASTM Oil IRM 903, 5h/300°F (149°C) 2 0 - 3 %
      3 ASTM Fuel A, 5h/73°F (23°C) 3 0 - 5 %
      4 ASTM Fuel B, 5h/73°F (23°C) 4 0 - 5 %
      Dielectric Strength ASTM D149-95a 1.5 kV/mm
      Density ASTM D149-95a 87 lb/ft ³ (1.4 g/cc ³)
      Leachable Chloride Content FSA Method 200 ppm
      ASTM F104 Line Call Out F712122B3E11K6M5
      Color

      Black

       

      DOWNLOAD SPEC SHEET

      Pressure/Temperature Graphs

      The pressure/temperature graphs shown are the most current method of determining the suitability of a gasket material in a known environment. However, chemical compatibility must also be considered.

      pT diagram for thickness 1/16":

      Gases & Steam

      4500-g&s

      Liquids

      4500-liquid

      In area 1 the gasket material is suitable using common installment practices subject to chemical compatibility.

      In area 2 appropriate measures are necessary for installation of the gasket to ensure maximum performance.

      In area 3 do not install gaskets in these applications without first contacting APG for technical support service.