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Product Overview
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 an embedded part of the railway fastening system, are pressed into concrete sleepers and work together with the E clip to fasten the rail. These components are manufactured using high-grade iron casting standards, including GB/T 1348-1988, NF EN 1563, ISO1038, DIN 1693, JIS G5502, KS D 4302, and BS EN 1563.
| Application |
Material Grade |
Standard |
| UIC54, UIC60, 115RE, 50kg rail, 60kg rail, BS80lbs, BS100lbs |
QT500-7, QT450-10, QT400-15 |
GB 1348-88 / GB 1348-89 |
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Technical Classification
Cast-in Rail Shoulder
Single Stem Iron Shoulders are used in pre-stressed concrete ties, while Twin Stem Iron Shoulders are designed for Bi-Block or Twin Block concrete ties. They provide a robust anchoring point for elastic rail clips within the railway infrastructure.
| 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 |
Chemical Composition Requirements
| Material |
C (%) |
Si (%) |
Mn (%) |
P (%) |
S (%) |
| QT400-15 | 3.5-3.6 | 3.0-3.2 | ≤0.5 | 0.07 | 0.02 |
| QT450-10 | 3.4-3.9 | 2.7-3.0 | 0.2-0.5 | 0.07 | 0.03 |
| QT500-7 | 3.4-3.8 | 2.5-2.9 | 0.6 | 0.08 | 0.025 |
Weld-on Rail Shoulder
The weld-on shoulder is used at specific rail positions where the shoulder is welded onto a flat steel plate rather than a standard tie plate. Manufactured via hot forging according to AREA standards, these are fabricated from low or medium carbon steel based on specific engineering requirements. They are highly cost-effective for fabrication of switch and crossing layouts.
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Frequently Asked Questions
Q1: What is the primary function of a rail shoulder?
The rail shoulder is used as a semi-embedded or welded part to securely fix elastic rail clips to the base plate or concrete ties, ensuring rail stability.
Q2: What materials are used in manufacturing rail shoulders?
They are primarily made from high-quality ductile iron, such as QT400-15, QT450-10, and QT500-7 (equivalent to GGG40, GGG45, and GGG50).
Q3: How do cast-in and weld-on shoulders differ?
Cast-in shoulders are embedded directly into concrete sleepers during production, while weld-on shoulders are forged and welded onto steel plates or sleepers for specific layouts.
Q4: Are these rail shoulders compliant with international standards?
Yes, they are manufactured according to various international standards including ISO, DIN, BS, JIS, and GB/T 1348.
Q5: Can the chemical composition be customized?
Yes, the carbon, silicon, and manganese levels can be adjusted to meet specific tensile and yield strength requirements for different railway projects.
Q6: What is the daily production capacity?
The production facility is capable of producing up to 20,000 pieces per day to support large-scale infrastructure projects.
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