Description
Technical Parameters
Railway Rail
| Category | Parameter | Description / Specification |
|---|---|---|
| General Information | Product Name | Railway Rail / Track Rail |
| Primary Function | To guide railway vehicle wheels, carry immense loads, and transmit forces to the sleepers and subgrade. | |
| Application | Mainlines, High-Speed Rail, Heavy-Haul, Metro, Light Rail, Industrial Sidings. | |
| Designation & Standards | Designation by Weight | kg/m or lb/yd (e.g., 60 kg/m, 115 RE). |
| International Standards | UIC (International Union of Railways), AREMA (American), BS (British), DIN (German), JIS (Japanese). | |
| Chinese Standards | GB/T (e.g., GB/T 2585) for standard rail, TB/T for railway-specific standards. | |
| Physical Dimensions | Profile Sections | Flat-bottom rail (Modern Standard), Bullhead rail, Grooved rail (for tramways). |
| Key Dimensions | Height, Head Width, Web Thickness, Base Width. | |
| Standard Lengths | 25 m, 50 m, 100 m, 120 m (Long welded rails - LWR). |
Common Rail Types & Applications Comparison
| Rail Type (Profile) | Theoretical Weight | Common Standards | Primary Application | Notes |
|---|---|---|---|---|
| CHN50 / UIC50 | 50.0 kg/m | GB/T, UIC | Older mainlines, Secondary lines. | Being phased out on heavy-duty lines. |
| CHN60 / UIC60 | 60.0 kg/m | GB/T, UIC | Standard for Chinese HSR, Global mainlines, Heavy-haul. | The most common rail worldwide for new projects. |
| 115 RE / 136 RE | 115 lb/yd | AREMA | North American mainlines and heavy-haul. | The standard profile in the US and Canada. |
| BS 90A / 113A | 90 lb/yd | BS | Legacy lines in UK and Commonwealth. | |
| CHN75 | 75.0 kg/m | Extreme Heavy-Haul lines (e.g., mining railways). | Used for the highest axle loads. |
Key Terminology Explained:
- Flat-bottom Rail: The modern standard rail profile, characterized by a wide, flat base that allows it to be securely fastened to sleepers.
- HS Code: The Harmonized System code used for classifying goods for customs purposes. Railway rails typically fall under HS Code 7302.10.
- Long Welded Rail (LWR) / Continuous Welded Rail (CWR): Long lengths of rail welded together at the factory or site. This eliminates joints, which are a source of maintenance and noise, and provides a smoother ride for high-speed traffic.
- Head Hardening: A heat treatment process that increases the hardness and wear resistance of the rail head, which is in direct contact with the wheels. This extends the rail's life, especially on curves.
- Grade: The steel composition and treatment determine the grade. Higher grades (e.g., R350HT) offer superior wear resistance and are used in high-stress areas.
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