Description

8620 is a low-alloy carbon steel known for its exceptional core strength, toughness, and hardenability. It is commonly used in various industrial applications.

Applications

8620 is widely utilized in gears, camshafts, axles, shafts, and other high-stress components where excellent strength, toughness, and wear resistance are required.

Blacksmith Applications

8620 is commonly used in blacksmithing for creating specialty tools, such as punches, chisels, and drifts, where its toughness and hardenability are advantageous.

8620 Forging Temperature

Forging should be performed between 2200°F - 1800°F (1204°C - 982°C) to achieve proper shaping and refinement of the steel's microstructure, followed by slow cooling in an insulating material or furnace.

8620 Heat Treatment

8620 Annealing Temperature

Annealing is typically carried out at 1500°F (816°C) for a sufficient amount of time, followed by slow cooling in the furnace to relieve internal stresses and improve machinability.

8620 Normalizing Temperature

Normalizing can be conducted at 1650°F to 1700°F (899°C to 927°C) for a suitable soak time, followed by air cooling to enhance the steel's toughness and refine its grain structure.

8620 Hardening Temperature

Hardening is achieved by heating the steel to 1500°F to 1600°F (816°C to 871°C) and then quenching in oil or water to obtain the desired hardness and strength.

8620 Tempering Temperature

Tempering should be carried out between 300°F to 1200°F (149°C to 649°C) to achieve the desired hardness, toughness, and dimensional stability of the steel.

Machinability

8620 has good machinability with appropriate cutting tools and techniques, making it suitable for various machining operations while maintaining its mechanical properties.

Weldability

8620 exhibits good weldability. However, preheating and post-weld heat treatment are often necessary to minimize the risk of cracking and achieve optimal properties.