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 Information

Model NO. Rail Shoulder QT500-7 (GGG50)

Type Shoulder

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

Origin China

HS Code 8602900000

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, 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.

Feature	Standard / Detail	Standard / Detail	Application Details
Application	UIC54	UIC60	115RE, 50kg rail, 60kg rail, BS80lbs, BS100lbs, etc.
Grade	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
Hardness	170~230HB	160~210HB	130~180HB

🛠️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 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.

📋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

🧪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	2.7-3.0	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 positions of rail where the shoulder is welded on flat steel plates rather than standard tie plates. The production method is hot forging, fabricated according to AREA standards. The material can be low or medium carbon steel based on specific requirements.

Rail cast iron shoulders can be welded onto longer length steel sleeper sections or bearers, particularly for switch and crossing layouts where vertical rail geometry is employed. This flexibility makes it highly cost-effective for complex layout designs.

Frequently Asked Questions

Q1: What is the primary function of a rail shoulder? A: The rail shoulder is used to fix elastic rail clips to the concrete ties or steel plates, ensuring the rail remains stable within the fastening system.

Q2: What is the difference between cast-in and weld-on shoulders? A: Cast-in shoulders are embedded directly into concrete sleepers during manufacturing, while weld-on shoulders are welded onto flat steel plates or sleepers, often used in special track layouts like switches and crossings.

Q3: Which materials are commonly used for rail shoulders? A: Cast-in shoulders are typically made from ductile iron (like QT500-7, QT450-10, QT400-15), while weld-on shoulders are made from low or medium carbon steel through hot forging.

Q4: What international standards do your rail shoulders comply with? A: They are manufactured to meet various global standards including GB/T 1348, ISO1038, DIN 1693, JIS G5502, and BS EN 1563 among others.

Q5: Can weld-on shoulders be used for vertical rail geometry? A: Yes, weld-on shoulders are particularly effective for locations where switch and crossing layouts employ vertical rail geometry due to their flexible placement capabilities.

Q6: What is the production capacity for rail shoulders? A: The production capacity is approximately 20,000 pieces per day, ensuring a steady supply for large-scale railway projects.