Characteristics of GB/T 16270 Q550E Steel
High Strength and High Toughness
Yield Strength: ≥550 MPa; Tensile Strength: 600–800 MPa, enabling it to withstand extreme loads.
Low-Temperature Toughness: Impact toughness remains ≥34 J at -40°C, preventing low-temperature embrittlement and making it suitable for engineering projects in extremely cold regions.
Fatigue and Impact Resistance: Resistant to cracking under long-term dynamic loads, such as wave impacts during ship navigation or vehicle vibrations on bridges.
Excellent Processing and Welding Performance
Processability: Supports flame cutting, plasma cutting, CNC bending, and other processes, with minimal springback after forming and high dimensional stability.
Weldability: Compatible with manual arc welding, submerged arc welding, gas shielded welding, and other methods. Weld joint strength matches the base material, with toughness meeting standards, reducing the risk of welding defects.
Corrosion and Wear Resistance
Enhanced corrosion resistance through microalloying with elements such as niobium (Nb), vanadium (V), and titanium (Ti), extending service life.
Suitable for wear-intensive applications like coal mining machinery and drill bits, reducing maintenance costs.
