GB/T 6653 is the standard for steel plates and strips for welded gas cylinders specified in the Chinese national standard. It includes five grades: HP345, HP325, HP295, HP265, and HP235.These grades of steel plates and strips for welded gas cylinders all exhibit excellent strength, good plasticity, and good weldability. They are primarily used for manufacturing low-pressure welded gas cylinders commonly used in industry and liquefied petroleum gas (LPG) cylinders.
GB/T 6653 HP325 steel plate and strip is a high-quality carbon structural steel material specifically designed for welded gas cylinders, offering specific strength along with excellent toughness, plasticity, and weldability.
GB/T 6653 HP295 is a high-strength, high-toughness steel plate and strip specifically used for manufacturing welded gas cylinders, with excellent weldability and cold working properties.
GB/T 6653 HP265 is a basic grade steel plate and strip for welded gas cylinders under the Chinese national standard, used for industrial common-use low-pressure welded gas cylinders and liquefied petroleum gas (LPG) cylinders.