Aflas - AGC Chemicals Company
ASTM D1418 Designation: FKM
ASTM D2000/SAE J200 Type, Class: HK
Standard Color: Black
Description: A copolymer of tetrafluoroethylene and propylene, AFLAS exhibits excellent chemical resistance properties, and good to fair high temperature retention of physical properties.
Key Use(s): Seals for oil field, industrial and chemical applications.
Temperature Range: Standard Compound: -23⁰ to +400⁰F. (Dry Heat Only)
Hardness (Shore A): 60 to 95.
Features: With good resistance to petroleum fluids; steam; a number of acids and alkalies; amines (anti-freeze); phosphate esters and brake fluids, AFLAS has generated considerable interest as a seal material for oil field, industrial and chemical applications.
Laboratory tests have demonstrated a high degree of heat resistance (to 400⁰F) with retention of slightly below average (2,500 psi) tensile properties. Tests have further shown abrasion resistance to be about the same as Fluorocarbon; cracking to appear after 100 to 200 flexes at 400⁰F; and no change in material properties after one year of weathering.
Limitations: Seven day immersion, at room temperature, in solvents indicates such significant volume changes as 50% in Acetone; 58% in MEK: 95% in MIK; 112% in Chloroform; 125% in Methyl Chloroform; and 249% in Trichlorotrifuoroethane. Compression set of 52% after 30 days at 400⁰F may be considered too high for some sealing applications.
Stigall Style: VIT-1775