Materials · 星辰 E7505
OME7505
Thermal-process FFKM for diffusion, RTP and epitaxy — the highest continuous service temperature in the range, up to 320 °C.
Properties
ASTM methods, stated conditions
- Hardness
- 75 Shore A (ASTM D2240)
- Tensile strength
- 20.5 MPa (ASTM D412)
- Elongation at break
- 200 % (ASTM D412)
- Compression set
- 23 % (ASTM D395 Method B, 70 h @ 300 °C, 25 % deflection, Type B)
- Service temperature
- -10 °C to +320 °C
- Process compatibility
- Dry + Wet
- Seal type
- Static + Dynamic
- Colour
- Black
Read the compression set with its condition — 23 % measured at 300 °C tells you nothing about performance at 200 °C. Every figure on this site is published with the temperature and duration it was measured at, so you can compare grades on the same basis.
Typical applications
Diffusion, CVD / MCVD, RTP and epitaxy furnace sealing
Comparable grades
Cross-reference
| Grade | Hardness | Service temp. | Comp. set | Why we pair them |
|---|---|---|---|---|
| Kalrez® 7075 | 75 Shore A | −18 to +327 °C | 10 % | Same hardness class and thermal-process duty. Their upper limit is marginally higher and compression set substantially tighter. |
| Chemraz® 615 | 80 Shore A | −18 to +324 °C | — | Similar thermal-process range at a slightly higher durometer. |
| Perlast® G75TX | 75 Shore A | up to +325 °C | — | Comparable high-temperature black FFKM for thermal oxidation and diffusion. |
Parameter-level comparison only — This pairing is drawn from publicly published hardness, temperature and compression-set figures and is a screening aid, not an equivalence claim. Sealing performance depends on your actual media, temperature, pressure, motion and gland design. Validate with a sample before switching an approved part.
Other grades
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