1 / 5
Grai Orthopedic Implants
Grai Orthopedic Implants
Cast-in Rail Shoulders: Prefabricated pieces in concrete sleepers, either single or double, used to secure elastic rails within a fastening system, mainly electronic fastenings. Cast iron shoulders are cast in iron, pre-embedded in concrete sleepers and used together with elastic clips to fix the rails.
Weld-on Shoulders: Designed for use in special trackwork locations that do not permit the use of standard tie plates. Applications include switches, scales, steel structures, and maintenance facilities. Generally used on flat steel plates, these shoulders are beveled to facilitate welding, providing optimum lateral resistance and maximum clip-toe load. They are available for all common standard rail sizes.
| Material | QT500-7 | QT450-10 | QT400-15 |
|---|---|---|---|
| Tensile Strength | ≥500 Mpa | ≥450 Mpa | ≥400 Mpa |
| Yield Strength | ≥320 Mpa | ≥310 Mpa | ≥250 Mpa |
| Elongation | ≥7 | ≥10 | ≥15 |
| Hardness | 170~230HB | 160~210HB | 130~180HB |
