Butyl Rubber (IIR vulcanized) vs FFKM Perfluoroelastomer (Kalrez 4079)
Property comparison of Butyl Rubber (IIR vulcanized) and FFKM Perfluoroelastomer (Kalrez 4079), both rubber elastomer.
| Property | Butyl Rubber (IIR vulcanized) | FFKM Perfluoroelastomer (Kalrez 4079) | Difference |
|---|---|---|---|
| Tensile strength | 14 MPa | 17 MPa | +21% |
| Elongation | 500 % | 150 % | -70% |
| Poisson ratio | 0.5 | 0.48 | -4% |
| Density | 1,270 kg/m³ | 2,020 kg/m³ | +59% |
| Coefficient of thermal expansion | 0.00019 1/K | 0.00036 1/K | +89% |
Difference is FFKM Perfluoroelastomer (Kalrez 4079) relative to Butyl Rubber (IIR vulcanized). Values are taken from the representative row of each material; both materials may have multiple heat treatments or conditions on their individual pages.
Identification
- standard
- ASTM
- standard
- ASTM
What else is in Engineering Database
AI built for engineering. Searches the engineering database, performs calculations, gives source-backed engineering insights.
Get started for free ↗Reference Data375 engineering tablesMaterial properties, pipe and shape dimensions, code tables, and electrical ratings across mechanical, civil, chemical, electrical, materials, and manufacturing engineering.
Browse dataCalculatorsDeterministic engineering calculatorsSizing, checking, and conversion tools that run against the reference tables. Inputs are code-compliant, outputs are traceable to the source standard.
Browse calculators