What are the requirements for the fatigue resistance of railroad pads?

Dec 24, 2025 Leave a message

Rail pads are elastic polyurethane mats which are interposed between steel rails and railway sleepers to protect the sleeper top from wearing and impacting.

 

rail fastening

 

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.

 

Working principle of railway pad

 

Railway pads work by acting as an elastic cushion between the rail and sleeper (tie), absorbing shock, distributing wheel loads over a wider area to reduce stress, and damping vibrations, which lowers noise, prevents wear, protects infrastructure, and improves overall track stability and longevity. They provide a buffer, preventing direct steel-on-concrete contact and ensuring component longevity by reducing abrasion and fatigue.

 

rail fasteners

 

What are the requirements for the fatigue resistance of railroad pads?

 

Rail pad fatigue resistance requires minimal property change (stiffness, pressure) after millions of load cycles (e.g., 3 million), low compression set (like <15% for polyurethane), and no visible damage (cracks, perforation) to maintain vibration isolation, track stability, and long service life (10+ years) under high-speed train impacts, assessed via standards like EN 13146/17282 testing for material durability.

 

Key Requirements & Testing:

 

  • High Cycle Durability: Pads must endure millions of load cycles (e.g., 3 million) with minimal degradation, tested via standards like EN 13146-4+A1,.

 

  • Stable Stiffness & Load Transfer: Static and dynamic bedding modulus (stiffness) should not change significantly (e.g., <25%) after fatigue testing to ensure consistent vibration damping.

 

  • Low Compression Set: Materials like polyurethane should have a low compression set (e.g., <15%) after fatigue tests to retain their elastic properties.

 

  • Visual Integrity: No cracking, perforation, or significant damage should occur during testing, confirmed by visual inspection.

 

  • Material Properties: Must meet baseline specs like tensile strength (e.g., ≥19 MPa) and elongation (e.g., >80%).

 

  • Environmental Resistance: Must maintain performance across wide temperature ranges (hot/cold) and resist aging/corrosion.

 

GNEE RAIL provides exceptional elastic rail pads of various types for high-speed railways, normal-speed railways, and cranes. Especially the rail pads made of rubber, EVA, TPEE, and HDPE are very popular with customers. Our railway rubber pads fit the rails such as UIC54, UIC60, BS80lbs, BS100lbs, etc. We have more than 130set of machines in our production lines which can reach an annual production capacity of up to 2000, 000 pieces of rail pads. We offer a wide range of rail pads and other track materials at competitive prices.

For more information – Get in touch now!