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. 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).
Available Types of Rail Shoulder
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 a Single Stem Iron Shoulder used in pre-stressed concrete ties, and the other is a Twin Stem Iron Shoulder used in Bi-Block or Twin Block concrete ties.
Cast-in Rail Shoulder Technical Data
| 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 Requirement
| Material |
C |
Si |
Mn |
P |
S |
| QT400-15 |
3.6-3.8 |
3.0-3.2 |
0.5 |
0.07 |
0.02 |
| QT450-10 |
3.4-3.9 |
3.7-3.0 |
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 typical rail positions where the shoulder is welded onto a flat steel plate rather than a standard tie plate. Produced via hot forging, it is fabricated according to AREA standards. Material options include low or medium carbon steel, depending on specific requirements.
These shoulders can be welded onto longer length steel sleeper sections or bearers, particularly useful for switch and crossing layouts where vertical rail geometry is employed.
Frequently Asked Questions (FAQ)
What is the primary function of a rail shoulder?
The rail shoulder is used as an embedded or welded part in railway fastening systems to secure elastic rail clips, ensuring the rail remains fixed to the ties or base plates.
What are the main types of rail shoulders available?
There are two main types: Cast-in shoulders, which are pressed into concrete sleepers during production, and Weld-on shoulders, which are welded onto steel plates or sleepers.
What materials are used for cast-in rail shoulders?
They are typically made from cast iron grades such as QT400-15, QT450-10, or QT500-7, complying with international standards like ISO1038 and DIN 1693.
When is a weld-on rail shoulder preferred over a cast-in one?
Weld-on shoulders are preferred for switch and crossing layouts or where vertical rail geometry requires specific shoulder positioning on steel sections.
What standards are followed for weld-on shoulder production?
Weld-on shoulders are usually fabricated according to the AREA (American Railway Engineering Association) standard using low or medium carbon steel.
What is the daily production capacity for these rail shoulders?
The current production capacity is approximately 20,000 pieces per day, ensuring a steady supply for large-scale railway projects.
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