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Technical/January 23, 2026
EPDM vs FKM: Which Material is Better for Industrial Steam Applications?
Technical Comparison: FKM vs NBR for EV Cooling Systems
| Parameter | FKM | NBR |
|---|---|---|
| Temperature Range | -20°C to +200°C | -40°C to +120°C |
| Compression Set (70 hrs @ 200°C) | 15-20% | 40-50% |
| Chemical Resistance | Excellent resistance to oils, fuels, and coolants | Good resistance to oils and fuels, poor resistance to coolants |
| Compliance Standards | IATF 16949, ASTM D2000, ISO 3601 | IATF 16949, ASTM D2000, ISO 3601 |
* 数据基于 IATF 16949, ASTM D2000, ISO 3601 标准测试
* FKM 在高温和化学耐性方面显著优于 NBR
EPDM vs FKM for Industrial Steam Applications
Material Overview
Selecting the right elastomer for steam applications requires evaluating temperature resistance, compression set, and chemical compatibility. EPDM (Ethylene Propylene Diene Monomer) and FKM (Fluorocarbon Rubber) are common choices, but their performance differs significantly under steam conditions.
Key Technical Parameters
Both materials must comply with IATF 16949 for automotive-grade quality, ASTM D2000 for material classification, and ISO 3601 for hydraulic seal standards. Below are critical performance metrics:
| Parameter | EPDM | FKM |
|---|---|---|
| Temperature Range | -50°C to +150°C (short-term 175°C) | -20°C to +200°C (short-term 230°C) |
| Compression Set (ASTM D395, 22h @ 150°C) | 15-25% | 20-35% |
| Steam Resistance (Saturated, 150°C) | Excellent (low swell) | Good (moderate degradation) |
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