Description

440C is a high-carbon stainless steel known for its excellent corrosion resistance, wear resistance, and high strength. It is commonly used in various industrial applications.

Applications

440C is widely used in high-end cutlery, knife blades, ball bearings, valve components, and other precision parts where exceptional hardness and corrosion resistance are required.

Blacksmith Applications

440C is commonly used by blacksmiths for forging high-quality blades, such as hunting knives, pocket knives, and chef knives, due to its excellent edge retention and corrosion resistance.

440C Forging Temperature

Forging should be done between 1900°F - 2100°F (1038°C to 1149°C) followed by slow cooling in a furnace or insulating material to reduce the risk of cracking.

440C Heat Treatment

440C Annealing Temperature

Annealing is typically performed at 1550°F (843°C) for a sufficient amount of time, followed by slow cooling in the furnace to relieve internal stresses.

440C Normalizing Temperature

Normalizing can be carried out at 1650°F to 1750°F (899°C to 954°C) for a proper soak time, followed by air cooling.

440C Hardening Temperature

Hardening is achieved by heating the steel to 1850°F to 1950°F (1010°C to 1066°C) and then quenching in oil or air for optimum hardness and toughness.

440C Tempering Temperature

Tempering should be performed between 300°F to 1200°F (149°C to 649°C) to achieve the desired hardness, toughness, and corrosion resistance.

Machinability

440C has fair to good machinability rating, but it can be a bit challenging due to its high hardness. Proper coolant and slower cutting speeds are recommended.

Weldability

440C stainless steel has poor weldability. It is not recommended for welding as it has the tendency to develop cracks. However, it can be welded with certain precautions and specialized techniques.