What is the Material of CR100 Crane Rail?
CR100 Crane Rail is commonly manufactured from U71Mn carbon-manganese rail steel, which complies with JIS E1101-93 / JIS E1103-93 standards. GNEE RAIL uses U71Mn as the standard material for CR100 Rail due to its excellent combination of high strength, wear resistance, and impact toughness, making it suitable for heavy-duty crane runway systems.
U71Mn provides a minimum tensile strength of ≥880 MPa and is designed to withstand heavy wheel loads and continuous operating conditions. Its balanced carbon and manganese composition enhances hardness, durability, and long-term structural stability, making CR100 Rail widely used in ports, steel mills, shipyards, mining facilities, and other demanding industrial applications.
Technical Datasheet of CR100 Crane Rail (U71Mn)
The tables below present the mechanical properties and chemical composition of GNEE RAIL CR100 Crane Rail (U71Mn).
Chemical Composition of U71Mn Steel (%)
| Element | Carbon (C) | Silicon (Si) | Manganese (Mn) | Phosphorus (P) | Sulfur (S) |
|---|---|---|---|---|---|
| U71Mn Specification | 0.65 - 0.76% | 0.15 - 0.35% | 1.10 - 1.40% | ≤ 0.030% | ≤ 0.030% |
Mechanical Properties of CR100 Rail Material
| Property | Tensile Strength (Rm) | Elongation (A) | Hardness (As-rolled) | Yield Strength (Re) |
|---|---|---|---|---|
| Typical Value | ≥ 880 MPa | ≥ 9% | 260 - 300 HBW | Meets JIS standards [2] (typically ≥ 440 MPa) |
Key Performance Advantages of U71Mn Material in CR100 Rail
- High Strength and Structural Stability
GNEE RAIL manufactures CR100 Rail using U71Mn steel to provide high strength and excellent resistance to deformation under heavy wheel loads. Combined with the CR100 profile, it delivers reliable performance in demanding crane runway systems.
- Excellent Wear Resistance
With a typical hardness of 260–300 HBW, U71Mn offers outstanding wear resistance, reducing rail head wear and extending the service life of both the rail and crane wheels in high-frequency operations.
- Reliable Weldability
U71Mn is suitable for common rail joining methods, including aluminothermic (thermite) welding and flash butt welding, making it easier to install and maintain continuous crane runway systems.
FAQ
Q1: What is the equivalent material to U71Mn steel?
A: U71Mn is a Chinese heavy rail steel grade widely used for crane rails and railway rails. It is generally comparable to EN 13674-1 R260 and UIC 900A in terms of strength and wear resistance. However, material equivalence should always be verified against the specific project specifications and applicable standards.
Q2: Can CR100 Rail made from U71Mn be welded?
A: Yes. U71Mn CR100 Rail is suitable for flash butt welding and aluminothermic (thermite) welding when proper welding procedures are followed. Correct preheating and post-weld treatment help ensure reliable joint performance and long-term service life.
Q3: What affects the price of CR100 Rail?
A: The price of CR100 Rail depends on several factors, including U71Mn steel prices, rail length, processing requirements (such as cutting or drilling), order quantity, packaging, and shipping destination.
Contact GNEE RAIL for a customized quotation based on your project requirements.
