What are the main types of round steel?

The main types of round steel include:

1. Q235B round steel: a low carbon structural steel, suitable for the manufacture of bearings, couplings, gears, etc.

2. 45# Round steel: a carbon structural steel with high hardness and strength, suitable for manufacturing machine tool parts, molds and tools.

3. 40Cr round steel: an alloy structural steel, with good heat resistance, wear resistance and high strength creep resistance, suitable for the manufacture of high strength bolts, bearings, half shafts, etc.

4. 20# round steel: a carbon structural steel with a hardness slightly lower than 45#, but good wear resistance and toughness, suitable for manufacturing machine tools, cars, tractors and other parts.

5. 16Mn round steel: a low alloy structural steel with high strength and hardness, suitable for the manufacture of building and mechanical structure parts.

6. 35CrMo round steel: an alloy structural steel with good strength, hardness and toughness, suitable for manufacturing high-strength hinge shaft, half shaft, rocker arm, etc.

7. 42CrMo round steel: an alloy structural steel, with extremely high strength and toughness, suitable for the manufacture of hydraulic machinery, heavy duty machinery, automotive hub and other high strength parts.