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Qt500-7 GB 1348-88 Rail Shoulder

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Product Description

Basic Specification

Model NO. QT500-7 Rail Shoulder

Customized Available

Certification ISO14001, ISO9001

Type Shoulder

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

Origin China

HS Code 8602900000

Capacity 20,000 PCS/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 essential for fixing elastic rail clips.

Casting shoulders act as the embedded part of the railway fastening system, pressed into concrete sleepers to work with E-clips. These are manufactured through casting iron according to international standards such as GB/T 1348-1988, NF EN 1563, ISO1038, DIN 1693, JIS G5502, KS D 4302, and BS EN 1563.

Material Standard	Application Details
QT500-7 (GB 1348-88)	UIC54
QT450-10 (GB 1348-88)	UIC60
QT400-15 (GB 1348-89)	115RE, 50kg rail, 60kg rail, BS80lbs, BS100lbs, etc.

Cast-in Rail Shoulder

Cast-in shoulders are semi-embedded parts used in pre-stressed concrete ties (Single Stem) or Bi-Block concrete ties (Twin Stem).

Mechanical Properties

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

Chemical Composition (%)

Material	C	Si	Mn	P	S
QT400-15	3.50-3.60	3.00-3.20	≤0.5	≤0.07	≤0.02
QT450-10	3.40-3.90	2.70-3.00	0.2-0.5	≤0.07	≤0.03
QT500-7	3.60-3.80	2.50-2.90	≤0.5	≤0.08	≤0.025

Weld-on Rail Shoulder

The weld-on shoulder is used where the shoulder is welded onto flat steel plates. Produced through hot forging and following AREA standards, these use low or medium carbon steel. They are highly cost-effective for switch and crossing layouts where vertical rail geometry is required.

Frequently Asked Questions

What are the main types of rail shoulders available?

There are two primary types: Cast-in shoulders, which are embedded in concrete ties, and Weld-on shoulders, which are welded onto flat steel plates.

What materials are used for cast-in shoulders?

They are typically made from ductile casting iron such as QT500-7, QT450-10, and QT400-15, conforming to various international standards like GB/T 1348 or DIN 1693.

Which rail types are compatible with QT500-7 shoulders?

QT500-7 material is commonly applied for UIC54 rail systems, offering high tensile strength (≥500 Mpa).

What is the advantage of using weld-on rail shoulders?

They allow for precise positioning on steel sleepers or bearers, making them highly cost-effective and useful for complex fabrication in switch and crossing layouts.

What are the mechanical requirements for these shoulders?

Requirements vary by grade; for example, QT500-7 requires a tensile strength of ≥500 Mpa, yield strength of ≥320 Mpa, and hardness between 170-230 HB.

Are customized rail shoulders available?

Yes, rail shoulders can be customized according to specific material requirements (low or medium carbon steel) and design layouts.