EN8 is a medium carbon steel with a carbon content of 0.25% to 0.60%. It is often used to manufacture mechanical parts, bearings, gears and other parts. It has high strength and wear resistance and can obtain high hardness and strength after heat treatment.

8620 steel bar is made of a kind of low alloy steel mainly composed of iron, carbon, silicon, manganese, phosphorus, sulfur, chromium, nickel and other elements. It has good hardenability and weldability, and can obtain excellent mechanical properties through heat treatment.

5160 steel bar is made of a medium-carbon alloy steel whose specific components include carbon, chromium, manganese, silicon, phosphorus and other elements. In addition, 5160 steel also contains a small amount of chromium for improved hardenability.

AISI 4340 carbon steel bar is made of a heat treatable low alloy steel containing chromium, nickel and molybdenum. It has high toughness and high strength under heat treatment conditions.

AISI 4140 steel bar is made of a low alloy steel containing chromium, molybdenum and manganese. It has a high carbon content and a good balance of strength, toughness, wear resistance, impact resistance and heat treatment capabilities.

AISI 4130 carbon steel bar has excellent strength, toughness and processability. Through normalizing and quenching treatment, the steel can achieve high strength and strength. In addition, the bars have excellent weldability and forgeability.

AISI 1025 steel bar is a medium carbon steel that offers plasticity, workability and strength. The steel contains between 0.22% and 0.28% carbon, so it is stronger than low carbon steel and more workable and malleable than high carbon steel.