The railway track shoulder is a semi-insert cast in the concrete sleeper to fix the elastic rail clip on the rail baseplates.
There are two types of railway track shoulders, cast-in rail shoulders and welded on rail shoulders, both of which are used to fix elastic rail clips.
1. Cast-in rail shoulders:
The cast-in rail shoulders are cast from cast iron. The shoulders are embedded in the concrete sleepers, and the rails are fixed together with the elastic rail clips.
For materials, casting shoulders include 3 types: malleable cast iron MCI shoulders and malleable cast iron SGCI shoulders and ductile iron SGCI shoulders.
Material: QT400-15, Qt450-10, QT500-7, QT600-3, QT700-2, ZG25, ZG35, ZG45, etc.
Standards: GB/T 1348-1988, NF EN 1563 (1997), ISO1038, DIN 1693, JIS G5502 (2001), KS D 4302, GOST 7293 (1985) or BS EN 1563 (1997).
2. Welded on Rail Shoulders:
The welded rail shoulder is made by hot forging. This type of shoulder is used where standard sleepers are not easy to use, and the shoulder needs to be welded to flat steel baseplates. In this way, it can always manufacture rail holding units on steel sleepers and baseplates in accordance with AREMA standards.
The welded shoulder can be used with Pandrol clips from 30 to 113 pounds.
3. Special Rail Shoulders:
This kind of rail shoulder can also be produced by hot forging, and used with rail clip bolts and special rail clips to fix the rail. The material is low carbon steel or medium carbon steel.