45 # 45 # seamless steel pipe of the great professional production Liaocheng 45 # seamless steel pipe 45 # seamless steel pipe price seamless steel pipe stock Shandong 45 # seamless steel pipe! 
 45 # 45 # seamless steel pipe of the great professional production Liaocheng 45 # seamless steel pipe 45 # seamless steel pipe price seamless steel pipe stock Shandong 45 # seamless steel pipe! 
 45 steel, quality carbon structural steel, hardness is not easy cutting, commonly used to mold templates, tip sub guide post, subject to heat treatment Quenched parts with good mechanical properties, are widely used in a variety of important structural components, especially those in the alternating load rod, bolts, gears and shafts, etc. Lower surface hardness, wear-resistant. Available quenched and tempered + surface hardening to improve the hardness of the surface of the part. Steel is widely used in machinery manufacturing, the mechanical properties of this steel is very good. But this is a medium carbon steel, the quenching performance is not good, and No. 45 steel hardened to HRC42 ~ 46. If you need surface hardness, and want to play the 45 # steel with superior mechanical properties, often 45 # steel surface carburizing, so you can get the desired surface hardness.