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Product Description
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 rail way fastening system are pressed in concrete sleeper and work together with the E clip to fasten the rail.
| Specifications |
UIC54 |
UIC60 |
115RE, 50kg, 60kg, BS80/100lbs |
| Material Name |
QT500-7 |
QT450-10 |
QT400-15 |
| Standard |
GB 1348-88 |
GB 1348-88 |
GB 1348-89 |
| Tensile Strength |
≥500 Mpa |
≥450 Mpa |
≥400 Mpa |
| Yield Strength |
≥320 Mpa |
≥310 Mpa |
≥250 Mpa |
| Elongation(%) |
≥7 |
≥10 |
≥15 |
| Hardness |
170~230HB |
160~210HB |
130~180HB |
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Types of Rail Shoulder Produced
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 of rail shoulders 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.
1. Cast-in Rail Shoulder
The casting shoulders are made from iron following international standards such as GB/T 1348-1988, NF EN 1563, ISO1038, DIN 1693, JIS G5502, KS D 4302, GOST 7293, or BS EN 1563.
Mechanical Property Table
| 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 |
2. Weld-on Rail Shoulder
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. Production involves hot forging according to AREA standards. Material can be low or medium carbon steel. These can be welded onto longer steel sleeper sections or bearers, making them cost-effective for switch and crossing layouts.
Frequently Asked Questions
What is the main function of a rail shoulder?
The rail shoulder is used as an embedded part in concrete rail ties to securely fix elastic rail clips, ensuring the rail remains fastened to the sleeper.
What are the differences between cast-in and weld-on shoulders?
Cast-in shoulders are pressed directly into concrete sleepers during manufacturing, while weld-on shoulders are welded onto flat steel plates or steel sleepers, often used in switch and crossing layouts.
Which materials are commonly used for rail shoulders?
Common materials include ductile iron grades like QT400-15, QT450-10, and QT500-7, which offer high tensile strength and appropriate elongation properties.
What standards do these rail shoulders comply with?
They are manufactured according to various international standards including GB/T 1348, ISO1038, DIN 1693, JIS G5502, and BS EN 1563.
Can weld-on shoulders be used for specific custom layouts?
Yes, their ability to be welded in specific positions makes them highly cost-effective and flexible for switch and crossing layouts where vertical rail geometry is required.
What is the daily production capacity for these components?
The current production capacity is approximately 20,000 pieces per day to meet large-scale infrastructure demands.
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