Engineered for extremes
XNBR Wear 90S
Read the code: XNBR, WEAR duty (abrasion and wear), 90 Shore A, S for sulfur 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 90 Shore A carboxylated nitrile for stripper rubbers, snubbing elements and rotating control device seals: high abrasion and tear resistance at elevated temperature in drilling fluids.
- Polymer class
- XNBR
- Duty
- WEAR: abrasion and wear
- Hardness
- 90 Shore A
- Temperature range
- -20 to 100 °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 | 90 | 85 to 95 | Shore A | ASTM D2240 / ISO 48-4, 1 s |
| Tensile strength | 24 | min 20 | MPa | ASTM D412 die C / ISO 37 type 2 |
| Elongation at break | 250 | min 180 | % | ASTM D412 die C / ISO 37 type 2 |
| Tear strength | 55 | min 45 | kN/m | ASTM D624 die C |
| Abrasion loss | 45 | max 60 | mm³ | ISO 4649 (DIN abrasion) |
| Compression set, 22 h at 100 °C | 25 | max 35 | % | ASTM D395 method B, button |
| IRM 903, 70 h at 100 °C, volume change | +5 | max 10 | % | ASTM D471 / ISO 1817 |
| TR10 | -15 | max -12 | °C | ASTM D1329 / ISO 2921 |
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 |
|---|---|---|---|
| Drilling fluid ageing | In-house method, published with results | Oil-based and water-based mud at 90 °C | Planned |
| Abrasion after ageing | ISO 4649 | After fluid ageing | 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