R50 (P50/UIC50) Rail – Specification & Material Table
|
Item |
Specification |
Notes |
|
Designation |
R50 / P50 / UIC50 (50E1) |
Nominal mass: 50 kg/m; Common global profile |
|
Executive Standard |
GOST R 51685, EN 13674‑1 |
Russian & European railway standards |
|
Theoretical Linear Mass |
51.80 kg/m (GOST); 50.90 kg/m (UIC) |
Standard tolerance values |
|
Cross‑section Dimensions |
Height: 152 mm; Head Width: 72 mm; Base Width: 132 mm; Web Thickness: 16 mm |
Per GOST standard; UIC has slight variations |
|
Cross‑sectional Area |
~65.60 cm² (GOST); ~64.80 cm² (UIC) |
Matched to linear mass |
|
Steel Grades |
R200, R260, R260Mn, R350HT |
R260 for standard mainline; R350HT for heavy haul |
|
Chemical Composition (wt%, typical) |
C: 0.65–0.80; Si: 0.20–0.80; Mn: 0.70–1.20; P ≤0.025; S ≤0.025 |
High-carbon, high-manganese steel |
|
Mechanical Properties (R260) |
Tensile Strength ≥880 MPa; Yield Strength ≥420 MPa; Hardness 260–300 HBW |
Excellent wear & fatigue resistance |
|
Standard Lengths |
12.5 m, 25 m |
Custom: 6–50 m (reduces joints) |
|
Key Applications |
Industrial tracks, light rail, secondary lines, metro |
Suitable for medium load, lower speed |
Technical Data:
