Non-Dovetail Powder Metallurgy Brake Pads for 300-350 km/h and Above EMUs

1.Product Description

Non-dovetail powder metallurgy(PM)brake pads are high-performance friction components designed for high-speed electric multiple units(EMUs)operating at 300-350 km/h and above.These brake pads feature a flat-back mounting design(non-dovetail)for improved structural stability and compatibility with modern knuckle-type brake calipers.

2.Key Features

?Powder Metallurgy Friction Material–Copper/iron-based matrix with high thermal stability(up to 750°C)

?Optimized for High-Speed Braking–Stable friction coefficient(μ=0.28–0.35)at extreme speeds

?Non-Dovetail Design–Eliminates stress concentrations,enhancing fatigue resistance

?Low Wear Rate–≤0.05 cm3/MJ(extends service life to 150,000–200,000 km)

?Integrated Wear Sensors–RFID or embedded indicators for real-time monitoring

3.Technical Specifications

Parameter Value Test Standard

Friction Coefficient(μ)0.28–0.35(stable at 550°C)UIC 541-5

Max Operating Temp 750°C(instant 900°C)EN 14535-2

Shear Strength≥40 MPa ISO 6312

Noise Level<75 dB at 300 km/h TSI 1302/2014

4.Material Composition

Base Matrix:Copper(60-70%)+Iron(15-20%)

Lubricants:Graphite(5-8%)+Molybdenum disulfide(MoS?,2-3%)

Reinforcements:Silicon carbide(SiC,3-5%)

Sintering Process:Hot-pressed at 850–950°C under 25–30 MPa

5.Applications

CR400"Fuxing"series(China)

Shinkansen E5/E6(Japan)

Other 300+km/h EMUs with knuckle-type calipers

6.Advantages Over Traditional Brake Pads

?30%better heat dissipation(reduced thermal cracking)

?15%longer lifespan compared to organic composite pads

?Simplified installation(bolt-on vs.dovetail machining)

7.Maintenance&Certification

Replacement Threshold:

Minimum thickness:5 mm(from initial 10 mm)

Crack limits:>2 mm depth or>15 mm length

Certifications:

CRCC(China)–Q/CR 546-2016

TSI(EU)–1302/2014

JIS(Japan)–E 4307

8.Special Variants

Low-Temperature Version(for–40°C environments,±5%μstability)

High-Humidity Optimized(coastal/rainy regions)

Compatible with ventilated forged steel discs(32–36 mm thickness).Performance data based on CRRC,Knorr-Bremse,and Hitachi Rail specifications.

For OEM/aftermarket inquiries,provide train model and brake system specifications for precise compatibility checks.