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Rail shoulder is cast in the concrete rail ties to fix the elastic rail clips. There are two types of rail shoulders available, the cast-in shoulder and the weld-on shoulder, both of which are used for the fixing of elastic rail clips. The casting shoulders as the embedded part of the railway fastening system are pressed in concrete sleeper and work together with the E clip to fasten the rail. The cast-in shoulder is made by casting from iron, such as, 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).
| Application | Material Name | Standard | Chemical Composition (%) |
|---|---|---|---|
| UIC54, UIC60, 115RE, 50kg, 60kg | QT500-7 | GB 1348-88 | C:3.60-3.80, Mn:0.2-0.5, Si:2.50-2.90 |
| Railway Track Systems | QT450-10 | GB 1348-88 | C:3.40-3.90, Mn:≤0.5, Si:2.70-3.00 |
| Standard Railway Rails | QT400-15 | GB 1348-89 | C:3.50-3.60, Mn:≤0.5, Si:3.0-3.2 |
The Rail shoulder is a semi-embedded part cast in the concrete rail ties to fix the elastic rail clip to the base plate. There are two common types available: Cast-in Shoulder and Weld-on Shoulder. One is the Single Stem Iron Shoulder used in pre-stressed concrete ties, and the other is the Twin Stem Iron Shoulder used in Bi-Block or Twin Block concrete ties.
| 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 |
The weld-on shoulder is used at typical positions where the rail shoulder is welded on a flat steel plate rather than a standard tie plate. Fabricated according to AREA standards using hot forging, the material can be low or medium carbon steel. These are particularly cost-effective for switch and crossing layouts where specific positioning is required by design.
