Cast-in Rail Shoulder in Railway Fastening System

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Cast-in Rail Shoulder in Railway Fastening System

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Product Description

Basic Specifications

Model NO.

Rail shoulder

Type

Shoulder

Transport Package

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

Origin

China

HS Code

7318150000

Production Capacity

20000PCS/Day

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 the embedded part of the railway fastening system are pressed in concrete sleepers and work together with the E clip to fasten the rail. The cast-in shoulder is manufactured using iron casting processes adhering to international standards such as GB/T 1348-1988, NF EN 1563, ISO1038, DIN 1693, JIS G5502, KS D 4302, GOST 7293, and BS EN 1563.

Material and Chemical Composition Standards

Application	Name (Grade)	Standard	Chemical Composition (%)
UIC54, UIC60, 115RE, 50kg, 60kg, BS80lbs, BS100lbs	QT500-7 / QT450-10 / QT400-15	GB 1348-88 / GB 1348-89	C: 3.40-3.90, Si: 2.50-3.2, Mn: ≤0.5, P: ≤0.08, S: ≤0.03

Available Types of Rail Shoulder

Cast-in Shoulder: Semi-embedded part cast in concrete rail ties. Available in Single Stem (for pre-stressed concrete ties) and Twin Stem (for Bi-Block or Twin Block ties).

Weld-on Shoulder: Used where the shoulder is welded onto flat steel plates rather than standard tie plates. Fabricated via hot forging according to AREA standards.

Mechanical Properties

Material	Tensile Strength (Mpa)	Yield Strength (Mpa)	Elongation (%)	Hardness
QT400-15 (GGG40)	≥400	≥250	≥15	130~180HB
QT450-10 (GGG45)	≥450	≥310	≥10	160~210HB
QT500-7 (GGG50)	≥500	≥320	≥7	170~230HB

Frequently Asked Questions (FAQ)

What is the primary function of a rail shoulder?

Rail shoulders are used to fix elastic rail clips to the base plate or concrete ties, ensuring the stability and alignment of the railway track system.

What are the main differences between cast-in and weld-on shoulders?

Cast-in shoulders are embedded directly into concrete sleepers during manufacturing, while weld-on shoulders are welded onto steel plates or sleepers, offering flexibility for custom layouts like switches and crossings.

Which materials are commonly used for manufacturing these shoulders?

Ductile iron grades like QT400-15, QT450-10, and QT500-7 are standard for cast-in shoulders, while weld-on shoulders are typically made from low or medium carbon steel.

Are the rail shoulders compatible with international standards?

Yes, they are produced according to various global standards including GB, ISO, DIN, NF, JIS, and AREA to ensure compatibility with different rail types like UIC60 and 115RE.

What is the advantage of using weld-on shoulders in switch layouts?

They can be welded in specific positions dictated by the layout design, making them a cost-effective solution for complex vertical rail geometries and custom switch fabrications.

What is the daily production capacity for these rail components?

The production capacity is approximately 20,000 pieces per day, ensuring a steady supply for large-scale railway projects.