Description

904L stainless steel is a high-alloy austenitic stainless steel known for its excellent corrosion resistance, especially in aggressive environments. It contains high levels of chromium, nickel, and molybdenum, providing superior resistance to pitting and crevice corrosion.

Applications

904L stainless steel is widely used in various industrial applications that require exceptional corrosion resistance. It is commonly used in the chemical, petrochemical, pharmaceutical, and food processing industries. It is also suitable for offshore and marine environments, as well as in heat exchangers, condensers, and other equipment exposed to corrosive substances.

Blacksmith Applications

Blacksmiths can utilize 904L stainless steel for crafting various tools and components where corrosion resistance is essential. It can be used for making high-quality knives, blades, hammers, and other hand tools that require excellent durability and resistance to wear and tear.

904L Forging Temperature

Forging of 904L stainless steel should be performed between 1100°C - 1260°C (2012°F - 2300°F). Post-forging, it is recommended to anneal the steel to relieve stress and restore its corrosion resistance properties.

904L Heat Treatment

904L Annealing Temperature

Annealing is typically done at 1093°C - 1150°C (2000°F - 2102°F) for a sufficient time, followed by water quenching or air cooling. This process helps in removing any internal stresses and improving the material's toughness.

904L Normalizing Temperature

Normalizing of 904L stainless steel can be carried out at 900°C - 950°C (1652°F - 1742°F) followed by air cooling. This process helps in achieving a uniform microstructure and improving the steel's mechanical properties.

904L Hardening Temperature

904L stainless steel does not respond well to conventional heat treatment methods for hardening. However, it can attain higher strength through cold working processes such as cold rolling or cold drawing.

904L Tempering Temperature

Tempering is generally not required for 904L stainless steel. However, if necessary, it can be performed at temperatures ranging from 200°C - 300°C (392°F - 572°F) to relieve stress and improve toughness.

Machinability

904L stainless steel has low machinability due to its high alloy content. It tends to work-harden quickly, making it challenging to machine. The use of high-speed steel or carbide tools with slow speeds and heavy feeds is recommended.

Weldability

904L stainless steel exhibits good weldability when using appropriate techniques. It is important to use low heat input and interpass temperature control to prevent precipitation of harmful phases. Post-weld annealing is often recommended to restore the material's corrosion resistance.