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Elastomer Service Properties: FFKM
Kalrez 6230 to Perlast G75S
Service temperature limits, chemical resistance ratings, mechanical properties, and cure data for engineering elastomers and rubber compounds
| elastomer | grade or variant | acid resistance | astm designation | chemical resistance notes | common name | compression set pct (%) | compression set temp C | compression set time hr | elongation at break pct (%) | fluorine content pct (%) | fuel resistance | gas permeability | hardness range shore a | max continuous temp C (C) | max service temp C (C) | min service temp C (C) | oil resistance | ozone resistance | standard | steam resistance | tensile strength mpa (MPa) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| FFKM | Kalrez 6230 | Excellent | FFKM (ASTM D1418) | Similar to 6375 but slightly lower max temp; good in steam and process chemicals | Kalrez 6230 | — | — | — | 75-200 | >70 | Excellent | Very Low | — | 260 | 260 | -20 | Excellent | Excellent | FDA, USP Class VI | Excellent | 10-14 |
| FFKM | Kalrez 6375 | Excellent | FFKM (ASTM D1418) | Broadest chemical resistance Kalrez grade; excellent in acids, bases, amines, steam, ethylene oxide, solvents | Kalrez 6375 (Spectrum) | 30 | 204 | 70 | 160 | >70 | Excellent | Very Low | 75 | 275 | 275 | -20 | Excellent | Excellent | FDA, USP Class VI | Excellent | 15-16 |
| FFKM | Kalrez 7075 | Excellent | FFKM (ASTM D1418) | Highest temperature Kalrez grade; enhanced elastomeric properties vs 4079; very low compression set | Kalrez 7075 | 12-15 | 204 | 70 | 160 | >70 | Excellent | Very Low | 75 | 327 | 327 | -20 | Excellent | Excellent | — | Poor | 17.9 |
| FFKM | Perlast G75B | Excellent | FFKM (ASTM D1418) | High-temperature black FFKM; 325C max | Perlast G75B | 26 | 200 | 72 | 131 | >70 | Excellent | Very Low | 78-79 | 325 | 325 | -15 | Excellent | Excellent | — | — | 19.2 |
| FFKM | Perlast G75S | Excellent | FFKM (ASTM D1418) | Broad chemical resistance; suitable for pharmaceutical APIs and aggressive cleaning agents | Perlast G75S | 20 | 200 | 72 | 237 | >70 | Excellent | Very Low | 75-80 | 310 | 310 | -15 | Excellent | Excellent | — | — | 19.0 |
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