45# S50C Carbon Steel Round Bar 4–300mm Diameter High Strength Shaft and Machinery Parts Steel

45# S50C carbon steel round bar is a widely used medium carbon structural steel known for its excellent comprehensive mechanical properties, good machinability, and cost-effectiveness. This versatile round bar is widely applied in manufacturing various mechanical components such as transmission shafts, gear shafts, connecting pins, bolts, and structural parts that require moderate strength and toughness. After quenching and tempering, 45# S50C carbon steel round bar achieves improved hardness and wear resistance, making it suitable for parts subjected to friction and alternating loads.
Our 45# S50C carbon steel round bar is produced through high-quality continuous casting and hot rolling processes, ensuring uniform composition, dense structure, and stable mechanical properties. The round bars are available in diameters from 4mm to 300mm, covering almost all general mechanical manufacturing needs. We offer various surface treatments including black skin, rough turning, precision turning, and centerless grinding to meet different precision requirements. 45# S50C carbon steel round bar performs well in cutting, drilling, milling, and threading, allowing for high-efficiency machining and reducing production time.
In industrial applications, 45# S50C carbon steel round bar is widely used in automotive parts, agricultural machinery, automation equipment, and general mechanical manufacturing. Its good weldability and forgeability further expand its application scope. Whether used for standard parts or customized mechanical components, 45# S50C carbon steel round bar provides reliable performance at a competitive cost. We provide customized cutting, chamfering, and heat treatment services according to customer drawings. For mechanical manufacturers seeking a balance between performance and cost, 45# S50C carbon steel round bar remains the most practical and popular choice for structural and transmission components.