Rail shoulder is a pre-inserted part in a concrete sleeper. It is used together with a rail clip to fix rails. According to different use requirements, rail shoulder can be completed by casting and hot forging.
Rail cast iron shoulders include M.C.I. shoulder manufactured from pearlitic malleable iron and S.G.C.I. shoulder manufactured from spheroid graphite iron. We ofer two types of iron shoulders. One is Single Stem lron Shoulder used in pre-stressed concrete ties and the other is Twin Stem lron Shoulder used in twin Block concrete ties.
Casting shoulders are pressed in concrete sleeper and assembled with E clip in order to fasten the rail. The material we use is cast iron and the mechanical property and chemical composition of the rail cast iron shoulder are shown below.
| Material | Tensile Strength(Mpa) | Yield Strength(Mpa) | Elongation(%) |
| QT400-15(GGG40) | 400 | 250 | 15 |
| QT450-10(GGG45) | 450 | 310 | 10 |
| QT500-7 (GGG50) | 500 | 320 | 7 |
This rail shoulder is produced by hot forging and used together with fasteners like bolt and clip, which is put into the concrete sleeper inadvance, it is widely used in Russia.
Matenal: Q235.35#.45#
Surface: Plain
Weld-on shoulder is made by hot forging, and such shoulder is used for places where standard sleepers are unable to be easily used so the shoulders need to be welded on the flat steel base plates. In this way, it can fabricates the rail retaining units on both the steel ties and base plates, according to AREMA standard always.
Weld-on shoulders can be applied for clips with a range of 30lbs to 113lbs.
