U75V
Data under reviewU75V is China’s vanadium-microalloyed rail steel to GB/T 2585, the workhorse upgrade over U71Mn for busy passenger and freight lines. Higher carbon, silicon and a small vanadium addition lift as-rolled strength to the 980 MPa class and slow head wear and rolling-contact fatigue.
Chemical composition
| Element | Content (%) |
|---|---|
| C | 0.71–0.80 |
| Si | 0.50–0.80 |
| Mn | 0.70–1.05 |
| V | 0.04–0.12 |
| P | ≤0.030 |
| S | ≤0.030 |
Weight percent, per the governing standard ranges. Actual values per heat are on the mill certificate.
Properties
| Tensile strength | ≥980 MPa (as-rolled rail) |
| Hardness | ~280–320 HB (rail head, typ.) |
| Density | 7.85 g/cm³ |
Heat treatment
Supplied as-rolled (pearlitic); the vanadium microalloy refines the pearlite for wear resistance without head hardening.
Equivalent grades
| Standard | Designation |
|---|---|
| din | R350HT class (near, EN 13674) |
| gb | U75V (GB/T 2585) |
Compare side by side: U75V vs R350HT · U75V vs U71Mn
Equivalents overlap in chemistry and use but are not always identical — see our equivalents guide before substituting in certified designs.
Applications & Processing
Applications: Rails for heavy-haul and high-speed conventional lines (60/75 kg/m profiles), turnouts, high-wear curves.
Processing: Rolled to profile like U71Mn; welded by flash-butt or aluminothermic processes qualified for high-carbon rail.
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Ask for a quotationVisit NasteelSource: GB/T 2585 published ranges · Last updated 2026-11-03. Data is indicative — verify critical values against the governing standard and mill certificate before use.