Recommended heat treatment temperature: normalizing 850, quenching 840, tempering 600. 45# seamless steel pipe is high-quality carbon structural steel with low hardness and easy cutting processing. It is commonly used in molds as templates, tips, guide posts, etc., but requires heat treatment.
45# seamless steel pipe is qualified if the hardness is greater than HRC55 (up to HRC62) before tempering after quenching. The highest hardness in practical application is HRC55 (high-frequency quenching HRC58).
Do not use the heat treatment process of carburizing and quenching for 45# seamless steel pipe. After quenching and tempering, the parts have good comprehensive mechanical properties. 45# seamless steel pipe is widely used in various important structural parts, especially those connecting rods, bolts, gears and shafts that work under alternating loads. But the surface hardness is low and it is not wear-resistant. Can be quenched and tempered + surface quenching to improve the surface hardness of parts.
