How to distinguish the materials of 0 # steel pipe and 45 # steel pipe? Today, the seamless steel pipe manufacturer's editor will give you an answer

They are usually suitable for the material of seamless steel pipes, which are divided into two commonly used types: GB8162 and GB8163. However, only GB8162 is available for 45 # steel, which is a commonly used material in mechanical processing.

Firstly, the c, Si, Mn, P, and S contents of 20 # and 45 # steel are different. 45 # steel has a higher c, Si, Mn, P, and S content than 20 # steel. You can buy this steel just to read the manual. 20 # steel has good hardenability, low hardenability, plasticity, toughness, and weldability. It has better toughness after hot rolling or normalizing, and can be used to produce small and medium-sized carburized, carbonitrided, and forged parts, such as lever shafts, gearbox forks, gears, heavy-duty machinery rods, hook rings, etc. 45 # steel is a commonly used medium carbon quenched and tempered steel with good comprehensive mechanical properties, low hardenability, and easy cracking during water quenching. Small parts should be treated with quenching and tempering, while large parts should be treated with normalizing. They are mainly used to manufacture high-strength moving parts, such as turbine impellers and compressor pistons. Shaft, gear, rack, worm gear, etc.  

They are usually suitable for the material of seamless steel pipes, which are divided into two commonly used types: GB8162 and GB8163. However, only GB8162 is available for 45 # steel, which is a commonly used steel pipe material for mechanical processing.