Performance and Application Value of HP265 Grade B (L245) Steel

HP265 Grade B (L245) is a widely used steel grade for pressure vessels and pipelines, often applied in petroleum and natural gas transportation as well as vessel manufacturing. It is a low-carbon micro-alloyed steel with moderate strength, good toughness, and weldability, suitable for medium-pressure service.

In terms of chemical composition, HP265 Grade B (L245) is primarily iron, with carbon content usually below 0.26%. Manganese is added to enhance strength and toughness, while silicon contributes to deoxidation and microstructure uniformity. Phosphorus and sulfur are strictly controlled to minimize negative effects on toughness and weldability. This composition allows the steel to meet pressure transmission requirements while retaining good processability.

This steel is often used in oil and gas pipeline systems, as well as in the fabrication of pressure vessels and storage tanks. It can withstand medium pressure conditions, making it suitable for transporting natural gas, petroleum, and other fluids over long distances. With balanced strength and weldability, HP265 Grade B (L245) is widely used in energy and chemical industries.