What are the minimum temperatures that rail pads can withstand?
Dec 19, 2025
Railway pads always play a key role in rail fastener system. It's a bedding device between the rail track and the railway sleeper (or railroad tie), which ensures the railway safely and stably operates by providing cushion and support.
What are the minimum temperatures that rail pads can withstand?
Rail pads (rubber, EVA, etc.) are designed for specific temperature ranges, commonly operating from -50°C (-58°F) up to 70°C (158°F), but higher-performance materials like Polyurethane can handle colder extremes, down to -40°C (-40°F), while maintaining function and resisting brittle fracture in alpine conditions. The key low-temperature factors are elastic recovery (to prevent hardening) and brittle fracture temperature, ensuring safety in cold climates.
| Raw Material | Rubber, EVA, TPEE, HDPE |
| Standard | UIC, AREMA, TB/T2626-95 |
| Application | 43kg/m, 50kg/m, 60kg/m, 75kg/m,115RE, UIC54, UIC60, S49 |
| Model number | 43-7-7, 43-10-7, 50-7-9, 50-10-9, 60-10-17, 60-12-17 |
| Operating temperature | -50~70 degrees |
| Certificate | MSDS, ROHS, REACH |
| Notes | They should be stored in a clean, ventilated place. Don't be in direct sunlight, and keep away from the heat source and chemical reagent. Don't touch the oil, organic solvent, and other chemicals. Banned exposure. |
What are the effects of low temperatures on rail pads?
Low temperatures make rail pads harder and stiffer, reducing their ability to cushion vibrations and absorb shock, which can lead to increased track noise, premature wear, and potential cracking or brittle failure, impacting ride comfort and track integrity by altering the crucial elasticity needed for safe operations, especially in extreme cold.
How to ensure that rail pads function effectively in low temperatures?
To ensure effective rail pad performance in low temperatures, select materials with good low-temp toughness (like special rubber or HDPE with additives), verify they meet strict brittle fracture and elasticity standards (e.g., impact strength > 40kJ/m² at -40℃), and ensure low-temperature wear resistance, as cold hardening reduces cushioning and can damage sleepers, while periodic inspection and specific material choices (like cork-rubber or advanced plastics) help maintain performance across extreme temperature shifts.
GNEE RAIL's rail pads exhibit significant performance advantages in low-temperature environments, primarily due to optimized material formulations, adaptable structural design, and process assurance. The specifics are as follows: They prioritize core base materials such as EPDM and low-temperature-resistant polyurethane. EPDM has a glass transition temperature as low as -55°C, combined with specialized low-temperature plasticizers, antifreeze agents, and composite anti-aging additives. This effectively prevents brittleness and hardening in extreme cold, allowing the pads to maintain over 60% resilience and stable elasticity even at -40°C, with a performance decay rate in vibration damping and noise reduction of less than 5%.
GNEE RAIL Low-Temperature Resistant Rail Pad vs. Conventional Rail Pad Key Performance Comparison Table
| Performance Indicator | GNEE RAIL Low-Temperature Resistant Rail Pad | Conventional Rail Pad |
|---|---|---|
| Minimum Applicable Temperature | -55℃ (glass transition temperature of EPDM base material) | -20℃~-30℃ |
| Rebound Rate at -40℃ | ≥60% | ≤30% |
| Vibration Reduction Performance Attenuation Rate at -40℃ | ＜5% | ＞25% |
| Service Life in Low-Temperature Environment (-40℃) | Extended by more than 30% | Prone to embrittlement and cracking, service life shortened by 50% |
| Crack Resistance under Temperature Shock (-40℃~20℃) | Bionic groove structure, no cracking risk | Prone to stress cracking |
| Low-Temperature Insulation Performance | Stable, no significant decrease in insulation resistance | Insulation performance attenuates, prone to interfering with track signals |
| Maintenance Requirement in Frigid Regions | No additional anti-freezing maintenance needed | Regular inspection and replacement required, increasing maintenance costs |
