The standard for 45# seamless steel pipe is GB8162; 45# steel is only available under GB8162. The 45# seamless steel pipe is a commonly used type of seamless steel pipe in mechanical processing.
The 20# seamless steel tube and 45# seamless steel tube differ in their carbon (C), silicon (Si), manganese (Mn), phosphorus (P), and sulfur (S) content, with the 45# seamless steel tube having higher values. The 20# seamless steel tube has lower hardenability and quenching hardness, as well as better plasticity, toughness, and weldability. After hot rolling or normalizing, its toughness is further improved. It can be used to manufacture less critical medium and small-sized carburizing, carbonitriding parts, and forgings, such as lever shafts, gear shift forks, gears, heavy-duty machine rods, hooks, and rings.
45# seamless steel pipe is a commonly used medium-carbon tempered steel with good comprehensive mechanical properties, low hardenability, and is prone to cracking during water quenching. Small parts are recommended for tempering treatment, while large parts are better suited for normalizing treatment. It is mainly used for manufacturing high-strength moving parts, such as turbine impellers, compressor pistons, shafts, gears, racks, and worm gears.
45# Seamless Steel Pipe has a carbon content of approximately 0.45%, contains trace amounts of manganese, silicon, and has low sulfur and phosphorus content.
News Center Co., Ltd.
