APG’s C-4439 - Fiberglass, Aramid, and Inorganic Fiber Sheets with Nitrile Binder is an excellent high-performance material for use in high temperature and high-stress applications. The expanded metal reinforcement is a galvanized low carbon steel insert which makes this material suitable when vibrations are present. This material is manufactured with a combination of fiberglass and aramid and inorganic fibers reinforced with a nitrile binder.
Performance
Max Temperature in Liquids: 775℉
Max Temperature in Steam: 500℉
Features
Aramid Fibers
Fiberglass
Galvanized low carbon steel insert
Product Specifications
Typical Values Refer to 1/16'' Thick Material Unless Noted
| Creep relaxation ASTM F38B (1/32") |
20 % |
| Compressibility ASTM F36J | 6 - 12 % |
| Recovery ASTM F36J | 50 % |
| KLINGER Hot Compression Test | |
| 1 Thickness Decrease 73°F (23°C) | 1 10 % initial |
| 2 Thickness Decrease 572° F (300°C) | 2 6 % additional |
| Weight increase ASTM F146 after immersion in | |
| Fuel B, 5h/73°F (23°C) |
9 % 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 - 5 % |
| 3 ASTM Fuel A, 5h/73°F (23°C) | 3 0 - 5 % |
| 4 ASTM Fuel B, 5h/73°F (23°C) | 4 5 - 10 % |
| Dielectric Strength ASTM D149-95a | 10 kV/mm |
| Density ASTM D149-95a | 131 lb/ft ³ (2.1 g/cc ³) |
| Leachable Chloride Content FSA Method |
150 ppm |
| ASTM F104 Line Call Out | F712112B3E12K6M8 |
| Color |
Red |
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
Liquids
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.