Railway Steel Rail
|
Model (Weight/Meter) |
Head Width |
Web Thickness |
Base Width |
Overall Height |
Steel Grade |
Delivery Condition |
Tensile Strength (Min.) |
Applicable Scenario & Gauge |
Compliance Stds |
|
30kg/m (Light Rail) |
51mm |
9.0mm |
100mm |
107mm |
U71Mn |
Hot-Rolled |
880MPa |
Urban Tram (1435mm Standard Gauge) |
GB/T 2585-2007, EN 13674-1 |
|
50kg/m (Mainline) |
65mm |
15.5mm |
132mm |
152mm |
U75V |
Hot-Rolled |
980MPa |
Regional Passenger/Freight (1435mm) |
GB/T 2585-2007, UIC 860-4 |
|
60kg/m (HSR) |
73mm |
16.5mm |
150mm |
176mm |
U78CrV |
On-Line Heat-Treated |
1180MPa |
High-Speed Rail (350km/h, 1435mm) |
GB/T 2585-2007, TB/T 3436 |
|
67.41kg/m (136RE) |
74.6mm |
17.5mm |
152.4mm |
185.7mm |
1100A |
Off-Line Heat-Treated |
1200MPa |
US Heavy-Haul (35t Axle Load) |
AREMA 11, AAR M-101 |
|
37.46kg/m (BS 75A) |
61.9mm |
12.7mm |
122.2mm |
128.6mm |
900A |
Hot-Rolled |
900MPa |
UK Regional Rail (1435mm) |
BS 11-1985, EN 13674-1 |
|
56.9kg/m (115RE) |
69.1mm |
15.9mm |
139.7mm |
168.3mm |
900A |
On-Line Heat-Treated |
1100MPa |
Australian Freight (1435mm) |
AREMA 11, AS 1085.14 |
Performance & Quality Inspection Checklist
|
Inspection Stage |
Key Item |
Test Method |
Acceptance Criterion |
Sampling Rule |
Tool/Reference |
|
Incoming Check |
Chemical Composition & Dimension |
Handheld PMI + 3D Scanner |
C: 0.71–0.80% (U75V); Dimension Tolerance: ±0.5mm |
2pcs/100m rail |
Portable PMI Analyzer; 3D Optical Scanner |
|
Welding Quality |
Weld Joint Strength |
Tensile Test + Ultrasonic Flaw Detection |
Weld Tensile Strength ≥90% of Base Metal; No Internal Defects (≥φ1.0mm) |
1 joint/500m rail |
Universal Testing Machine; Ultrasonic Tester |
|
Mechanical Performance |
Hardness & Impact Toughness |
Brinell Hardness Tester + Charpy Impact Tester |
Rail Head Hardness: 260–300 HB; Impact Toughness ≥20J (-20℃) |
3 points/10m rail |
HB-3000 Hardness Tester; Charpy Tester |
|
Long-Term Durability |
Fatigue & Wear Resistance |
Fatigue Test Bench + Wear Tester |
No Cracks After 5×10⁶ Cycles; Wear Loss ≤0.2mm/10⁶ Ton·km |
1pc/batch |
Servo Hydraulic Fatigue Tester; Abrasion Tester |
|
Metallographic Audit |
Microstructure |
Metallographic Microscope |
Pearlite Structure (≥95%); No Martensite/Cracks |
1 sample/1000m rail |
500× Metallographic Microscope |
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