UIC54 R350HT Rail 54E1 EN 13674 | Head Hardened Heat Treated Rail

Rail & Fittings, Steel Rail

UIC54 R350HT Rail 54E1 EN 13674 | Head Hardened Heat Treated Rail

UIC54 R350HT rail is a premium head heat-treated heavy rail adopting 54E1 profile, manufactured strictly in accordance with EN 13674-1 European standards. Compared with conventional untreated R260 rail, R350HT applies precise online thermal treatment technology to strengthen the surface layer of rail head, delivering high hardness and superior rolling contact fatigue resistance.

This upgraded UIC54 grade is specially developed for routes bearing heavy freight loads, frequent braking and heavy abrasion on curved tracks. It effectively inhibits rail head spalling, crack propagation and surface wear, greatly extending service cycle and lowering track maintenance costs. It is an optimal upgrade solution for medium-heavy 1435mm standard gauge railway projects across the Middle East, Southeast Asia, Africa and Europe.

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Product Detail

Chemical Component

Standard & Dimension Table

Executive Standard：EN 13674-1 Rail Model：UIC54 / 54E1 Applicable Track Gauge：1435mm Standard Gauge

Parameter	Specification
Theoretical Weight	54.77 kg/m
Total Rail Height	159 mm
Rail Base Width	140 mm
Rail Head Width	70 mm
Web Thickness	16.0 mm

Steel Grade Introduction — R350HT

R350HT is professional head-hardened heat-treated pearlitic rail steel specified by EN standard. Controlled rapid quenching is carried out on rail head surface, forming a wear-resistant high-hardness outer layer while maintaining good internal matrix toughness, balancing hardness and impact resistance.

Outstanding wear resistance under continuous heavy cyclic axle loads
Strong resistance to rolling contact fatigue, shelling and surface cracks
Excellent performance on curved tracks, ramps and frequent braking sections
Far longer service life than ordinary R260 rail
Stable metallurgical quality and reliable field welding property

Chemical Composition (R350HT)

Element	Content Range (%)
C (Carbon)	0.72 ~ 0.80
Si (Silicon)	0.15 ~ 0.58
Mn (Manganese)	0.70 ~ 1.20
P (Phosphorus)	≤ 0.025
S (Sulfur)	≤ 0.025

Mechanical Properties ( EN 13674-1)

Mechanical Index	Standard Value (R350HT)
Tensile Strength	≥ 1180 MPa
Yield Strength	≥ 680 MPa
Elongation	≥ 8%
Rail Head Hardness	350 – 390 HB

Application Scenarios

Medium and heavy haul freight main lines
High-density passenger-freight mixed traffic trunk routes
Curved sections, slope sections and frequent braking zones
Port terminals, logistics hubs and heavy industrial dedicated railways
Railway reconstruction & upgrading projects pursuing long service life and low maintenance frequency