Engineered for extremes
EPDM EHC 70P
Read the code: EPDM, EHC duty (phosphate-ester (EHC) fluids), 70 Shore A, P for peroxide cure, recipe 01.
Development grade. The values below are design targets, not measured results. Each target becomes a typical value, with the number of lots and the test report behind it, as testing is completed.
A 70 Shore A EPDM for phosphate-ester fire-resistant fluids: steam turbine electro-hydraulic control (EHC) systems, accumulator bladders and fire-resistant hydraulics. Nitrile, the usual hydraulic rubber, is attacked by these fluids.
- Polymer class
- EPDM
- Duty
- EHC: phosphate-ester (EHC) fluids
- Hardness
- 70 Shore A
- Temperature range
- -40 to 125 °C
- Lead time
- Trial quantities on request
- Minimum order
- 25 kg
- Issued
- 2026-10-28
- Revision
- A
- Packing
- Per order
Design targets and release limits
| Property | Target | Limits | Unit | Method |
|---|---|---|---|---|
| Hardness | 70 | 65 to 75 | Shore A | ASTM D2240 / ISO 48-4, 1 s |
| Tensile strength | 13 | min 10 | MPa | ASTM D412 die C / ISO 37 type 2 |
| Elongation at break | 300 | min 220 | % | ASTM D412 die C / ISO 37 type 2 |
| Compression set, 22 h at 125 °C | 15 | max 25 | % | ASTM D395 method B, button |
| TR10 | -45 | max -40 | °C | ASTM D1329 / ISO 2921 |
| Phosphate ester (ISO VG 46), 168 h at 100 °C, volume change | +4 | max 10 | % | ASTM D471 / ISO 1817 |
| Phosphate ester (ISO VG 46), 168 h at 100 °C, hardness change | -3 | -6 to 3 | points | ASTM D471 / ISO 1817 |
| Mineral oil (IRM 903) | Not suitable | — | EPDM swells in mineral oils |
Qualification plan
The grade code says what this compound is designed for. This table says what it has passed: a duty is claimed only once its report is on file.
| Test | Standard or method | Conditions | Status |
|---|---|---|---|
| Phosphate ester immersion | ASTM D471 | Customer fluid, 168 h and 1,000 h at 100 °C | Planned |
| Turbine OEM approval | Customer qualification | Per OEM | Planned |
Design targets are the values the compound is designed to reach. They are not measured results and they are not a warranty. Release limits apply to lots once the recipe is approved. The grade code says what the compound is designed for; the qualification plan says what it has passed. Confirm suitability in your own application and fluids.
Every lot is supplied with a certificate of analysis. Enter the lot ID under Track on the website to see the lot record. Pascalor is an independent brand and is not affiliated with any polymer manufacturer named elsewhere on this site.
Registered entity name to be added | quotes@pascalor.com