Product model: CXD250-2

Product features: The friction coefficient changes little with temperature, pressure, and speed, with good resistance to high temperatures and biting, low wear, and long service life.

Dovetail Universal Powder Metallurgy Brake Pads for 200-250 km/h EMUs

1.Product Overview

Dovetail universal powder metallurgy(PM)brake pads are high-performance friction components designed for electric multiple units(EMUs)operating at 200-250 km/h.These brake pads feature a dovetail mounting design for secure attachment to standard brake calipers,ensuring reliable performance under frequent braking conditions.

2.Key Features

?Powder Metallurgy Friction Material–Copper/iron-based matrix with excellent thermal stability(up to 650°C)

?Optimized for Medium-High-Speed Braking–Stable friction coefficient(μ=0.30–0.38)

?Dovetail Mounting–Ensures secure fit and vibration resistance

?Low Wear Rate–≤0.07 cm3/MJ(extends service life to 120,000–150,000 km)

?Reduced Noise&Vibration–Engineered for smooth braking(<78 dB)

3.Technical Specifications

Parameter Value Test Standard

Friction Coefficient(μ)0.30–0.38(stable at 500°C)UIC 541-5

Max Operating Temp 650°C(instant 800°C)EN 14535-2

Shear Strength≥35 MPa ISO 6312

Noise Level<78 dB at 250 km/h TSI 1302/2014

4.Material Composition

Base Matrix:Copper(55-65%)+Iron(20-25%)

Lubricants:Graphite(6-9%)+Molybdenum disulfide(MoS?,1-2%)

Reinforcements:Silicon carbide(SiC,2-4%)

Sintering Process:Hot-pressed at 800–900°C under 20–25 MPa

5.Applications

CRH3/CRH5 series(China)

Siemens Desiro(Europe)

Other 200-250 km/h EMUs with dovetail calipers

6.Advantages Over Organic Brake Pads

?25%better heat dissipation(reduced thermal fade)

?20%longer lifespan compared to resin-based pads

?Universal dovetail compatibility(fits multiple EMU models)

7.Maintenance&Certification

Replacement Threshold:

Minimum thickness:5 mm(from initial 12 mm)

Crack limits:>2 mm depth or>10 mm length

Certifications:

CRCC(China)–Q/CR 546-2016

TSI(EU)–1302/2014

AAR(North America)–M-926

8.Special Variants

High-Humidity Version(anti-corrosion treatment for coastal areas)

Enhanced Cold-Weather Performance(stableμat–30°C)

Compatible with standard cast steel discs(28–32 mm thickness).Performance data based on Siemens,Bombardier,and CRRC specifications.

For OEM/aftermarket compatibility,provide train model and brake system details for verification.