R260 vs U71Mn
These two grades are listed as equivalents of each other: their chemistry windows overlap and they serve the same applications. They are not always identical — check the differences below before substituting, especially in certified designs.
R260
Structural & HSLA Steel
R260 is the world’s standard rail steel grade to EN 13674-1, a pearlitic carbon-manganese steel whose as-rolled head hardness of 260–300 HBW balances wear against weldability and cost. Most conventional and mixed-traffic lines outside China are laid in R260.
Standards: DIN R260 (EN 13674-1) · GB U71Mn (near, GB/T 2585)
U71Mn
Structural & HSLA Steel
U71Mn is China’s standard carbon rail steel to GB/T 2585, the pearlitic C-Mn grade laid on most conventional-speed lines. Wear resistance comes from its high carbon and manganese; weldability is limited and rail joints are aluminothermic or flash-butt welded.
Standards: DIN R260 family (near, EN 13674) · GB U71Mn (GB/T 2585)
Chemical composition compared (%)
| Element | R260 | U71Mn |
|---|---|---|
| C | 0.62–0.80 | 0.65–0.76 |
| Si | 0.15–0.58 | 0.15–0.35 |
| Mn | 0.65–1.25 | 1.10–1.40 |
| P | ≤0.025 | ≤0.030 |
| S | ≤0.025 | ≤0.030 |
| Cr | ≤0.15 | — |
Properties compared
| Property | R260 | U71Mn |
|---|---|---|
| Tensile strength | ≥880 MPa (rail, as-rolled) | ≥880 MPa (as-rolled rail) |
| Hardness | 260–300 HBW (rail head) | ~260–300 HB (rail head, typ.) |
| Density | 7.85 g/cm³ | 7.85 g/cm³ |
Sourcing either grade?
Nasteel stocks both families from Shenzhen with EN 10204 3.1 mill certificates by heat number.
Ask for a quotationSee full data sheets: R260 · U71Mn. Substitution decisions for certified parts stay with the design authority.