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Qt500-7 GB 1348-88 Rail Shoulder

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Product Description

Basic Specifications

Model NO.QT500-7 Rail Shoulder

CustomizedAvailable

CertificationISO14001, ISO9001

TypeShoulder

Transport PackageCartons, Woven-Bags in Wooden Cases

OriginChina

HS Code8602900000

Production Capacity20000 PCS/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 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, 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).

Specification	UIC54	UIC60	Standard Rails
Material Name	QT500-7	QT450-10	QT400-15
Standard	GB 1348-88	GB 1348-88	GB 1348-89
Tensile Strength	≥500 Mpa	≥450 Mpa	≥400 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: 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

Cast-in Rail Shoulder Chemical Composition

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 flat steel plates rather than standard tie plates. Produced by hot forging and fabricated according to AREA standards, these are made from low or medium carbon steel.

Cast iron shoulders can also be welded onto longer length steel sleeper sections or bearers, making them particularly useful and cost-effective for switch and crossing layouts where vertical rail geometry is employed.

Frequently Asked Questions

1. What is the primary function of a rail shoulder? It is used as an embedded part in concrete rail ties to secure elastic rail clips, effectively fastening the rail to the sleepers.

2. What are the main differences between cast-in and weld-on shoulders? Cast-in shoulders are pre-pressed into concrete sleepers during manufacturing, while weld-on shoulders are welded onto flat steel plates or specialized steel sleeper sections.

3. What materials are used for producing rail shoulders? Cast-in shoulders are typically made from various grades of cast iron (like QT500-7 or GGG50), while weld-on shoulders are forged from low or medium carbon steel.

4. Which standards are these railway shoulders manufactured to? They are manufactured according to global standards including GB/T 1348-1988, ISO1038, DIN 1693, JIS G5502, and AREA standards for forged components.

5. Can rail shoulders be used for custom switch and crossing layouts? Yes, especially weld-on shoulders, as they can be positioned precisely according to layout designs, providing a cost-effective solution for complex rail geometries.

6. What is the daily production capacity for these components? The facility maintains a high production capacity of approximately 20,000 pieces per day to meet large-scale railway project requirements.