Rail Shoulder Qt400-15 (GGG40) Qt450-10 (GGG45) Qt500-7 (GGG50)

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Rail Shoulder Qt400-15 (GGG40) Qt450-10 (GGG45) Qt500-7 (GGG50)

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Product Description

Basic Info.

Model NO.

Rail Shoulder QT500-7 (GGG50)

Type

Shoulder

Transport Package

Cartons, Woven-Bags or Gunny-Bags in Wooden Cases

Origin

China

HS Code

8602900000

Production Capacity

20000PCS/Day

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).

Material Specs	QT500-7	QT450-10	QT400-15
Application	UIC54	UIC60	115RE, 50kg rail, 60kg rail, BS80lbs, BS100lbs, ect.
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

What Types of Rail Shoulder are Produced

The Rail shoulder is 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 Single Stem Iron Shoulder used in pre-stressed concrete ties and the other is Twin Stem Iron Shoulder used in Bi-Block or Twin Block concrete ties.

Cast-in Rail Shoulder Mechanical Property

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

Weld-on Rail Shoulder

The weld-on shoulder is used at the typical position of rail where the rail shoulder is weld on flat steel plate rather than the standard tie plate. The weld-on shoulder production method is hot forging, it is fabricated according to AREA standard. The steel material type for weld-on shoulders production can be low or medium carbon steel.

Rail cast iron shoulders can be welded on to longer length steel sleeper sections or bearers for locations where switch and crossing layouts are employed. The ability to be welded in specific positions makes it cost effective and versatile.

Frequently Asked Questions

What is the primary function of a rail shoulder?

A rail shoulder is cast into concrete rail ties or welded onto steel plates to securely fix elastic rail clips, ensuring the stability of the railway fastening system.

What are the main types of rail shoulders available?

There are two primary types: Cast-in shoulders (embedded in concrete sleepers) and Weld-on shoulders (welded onto flat steel plates or steel sleepers).

What materials are used for producing cast-in shoulders?

They are typically made from ductile iron grades such as QT400-15 (GGG40), QT450-10 (GGG45), and QT500-7 (GGG50), following international standards like ISO1038 and DIN 1693.

What is the production method for weld-on shoulders?

Weld-on shoulders are manufactured using the hot forging method and are generally fabricated according to AREA standards using low or medium carbon steel.

In which rail applications is the QT500-7 material used?

The QT500-7 (GGG50) material is commonly applied in UIC54 rail systems and provides a tensile strength of ≥500 Mpa.

Why are weld-on shoulders considered cost-effective?

They allow for precise positioning in switch and crossing layouts where vertical rail geometry is required, making them versatile and economical for specific design layouts.