1.4057, also known as R18 or X17CrNi16-2, is a martensitic stainless steel with good corrosion resistance and high strength. It contains chromium, nickel, and a small amount of molybdenum, which contributes to its corrosion resistance and toughness.
1.4057 is commonly used in applications where high strength, corrosion resistance, and good wear resistance are required, such as in the manufacturing of shafts, valves, and pumps. It is also used in the production of knives, surgical instruments, and other cutting tools, as well as in the food and beverage industry for equipment that comes into contact with acidic or salty foods.
Due to its good machinability and weldability, 1.4057 is a popular choice in many industries. It can be hardened through heat treatment to achieve even greater strength and wear resistance.