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 Specifications

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 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 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.

Specification	UIC54	UIC60	Others
Material Grade	QT500-7	QT450-10	QT400-15 / 115RE / 50kg / 60kg
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 (HB)	170~230	160~210	130~180

Types of Rail Shoulders

1. Cast-in Rail Shoulder:

The Rail shoulder is a semi-embedded part cast in concrete rail ties to fix the elastic rail clip to the base plate. Single Stem Iron Shoulders are used in pre-stressed concrete ties, while Twin Stem Iron Shoulders are used in Bi-Block or Twin Block concrete ties.

2. Weld-on Rail Shoulder:

Used where the shoulder is welded on flat steel plates rather than standard tie plates. Produced via hot forging from low or medium carbon steel. These are particularly cost-effective for switch and crossing layouts where vertical rail geometry is employed.

Chemical Composition Requirements (%)

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

Frequently Asked Questions

1. What is the primary function of a rail shoulder?

Rail shoulders are embedded in concrete ties or welded to steel plates to securely fix elastic rail clips, ensuring the stability of the rail tracks.

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

Cast-in shoulders are integrated into concrete sleepers during casting, while weld-on shoulders are welded onto steel plates or sleepers, often used in switch and crossing layouts.

3. Which materials are commonly used for manufacturing?

We primarily use ductile iron grades like QT400-15 (GGG40), QT450-10 (GGG45), and QT500-7 (GGG50) for casting, and low or medium carbon steel for forged weld-on versions.

4. Which railway standards do these products meet?

Our rail shoulders comply with various international standards including GB/T 1348, ISO1038, DIN 1693, JIS G5502, and BS EN 1563.

5. What is the daily production capacity?

The production facility is capable of outputting 20,000 pieces per day to meet large-scale infrastructure demands.

6. Can weld-on shoulders be used for special track designs?

Yes, weld-on shoulders are highly versatile and cost-effective for custom layouts, switch fabrications, and crossing sections where specific rail geometry is required.