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Blutree Orthopedic Implants
Blutree Orthopedic Implants
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 sleepers and work together with the E-clip to fasten the rail. The cast-in shoulder is made by casting from iron, following international standards 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).
| Specifications | Details | Details | Compatibility |
|---|---|---|---|
| Application | UIC54 | UIC60 | 115RE, 50kg rail, 60kg rail, BS80lbs, BS100lbs, etc. |
| Name | QT500-7 | QT450-10 | QT400-15 |
| Standard | GB 1348-88 | GB 1348-88 | GB 1348-89 |
| Chemical Composition (%) | C:3.60-3.80 Mn:0.2-0.5 Si:2.50-2.90 P:≤0.08 S:≤0.025 |
C:3.40-3.90 Mn:≤0.5 Si:2.70-3.00 P:≤0.07 S:≤0.03 |
C:3.50-3.60 Mn:≤0.5 Si:3.0-3.2 P:≤0.07 S:≤0.02 |
| Tensile Strength | ≥500 Mpa | ≥450 Mpa | ≥400 Mpa |
| Hardness | 170~230HB | 160~210HB | 130~180HB |
The rail shoulder is a semi-embedded part cast in 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 rail positions where the shoulder is welded onto a flat steel plate rather than a standard tie plate. These are manufactured through hot forging and follow AREA standards. The material used is typically low or medium carbon steel, depending on specific project requirements.
Rail cast iron shoulders can also be welded onto longer length steel sleeper sections or bearers, making them cost-effective for switch and crossing layouts where specific rail geometry is required.
