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A "weld-on shoulder" typically refers to a specialized component used in railway track construction that is welded onto the base of the rail. This type of component is used to provide additional support, stability, and reinforcement to the rail and the track structure. The term "weld-on" indicates that the shoulder is welded directly to the rail, creating a strong and integrated connection. Weld-on shoulders provide an extra layer of support for the rail, distributing the weight of passing trains more evenly onto the rail and the underlying track components. By securing the rail firmly in place, weld-on shoulders help prevent rail movement, maintaining track alignment and stability. This is crucial for safe train operations.
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Product |
Rail shoulder |
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Application |
UIC54 |
UIC60 |
115RE, 50kg rail, 60kg rail, BS80lbs, BS100lbs, ect. |
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Material |
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Name |
QT500-7 |
QT450-10 |
QT400-15 |
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Standard |
GB 1348-88 |
GB 1348-88 |
GB 1348-89 |
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Chemical composition(%) |
C:3.60-3.80 |
C:3.40-3.90 |
C:3.50-3.60 |
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C:3.60-3.80 |
Mn:0.2-0.5 |
Mn:≤0.5 |
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Si:2.50-2.90 |
Si:2.70-3.00 |
Si:3.0-3.2 |
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P:≤0.08 |
P:≤0.07 |
P:≤0.07 |
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S:≤0.025 |
S:≤0.03 |
S:≤0.02 |
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Tensile Strength |
≥500 Mpa |
≥450 Mpa |
≥400 Mpa |
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Yield Strength |
≥320 Mpa |
≥310 Mpa |
≥250 Mpa |
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Elongation(%) |
≥7 |
≥10 |
≥15 |
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Hardness |
170~230HB |
160~210HB |
130~180HB |
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Metallographic organization |
ferrite + pearlite |
graphite + ferrite + pearlite |
ferrite |
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Surface |
plain (oiled) |
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The addition of weld-on shoulders helps distribute the loads generated by passing trains across a larger area of the rail base. This can reduce concentrated pressure points and the risk of rail wear. Weld-on shoulders help reduce stress on the rail, particularly at areas where dynamic forces are exerted, such as curves and switches. Weld-on shoulders contribute to maintaining proper rail alignment and gauge, preventing rail spreading and maintaining track integrity. By reducing wear and stress on the rail, weld-on shoulders can contribute to extending the service life of the rail. Weld-on shoulders need to be compatible with the specific rail profile and dimensions to ensure proper installation and functionality. Proper welding techniques are crucial when attaching weld-on shoulders to the rail. Experienced welders ensure a strong and durable connection. Weld-on shoulders are typically made from durable materials, such as steel, that can withstand the forces exerted by passing trains and environmental conditions.
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