Stainless steel 904L is an austenitic chromium-nickel-iron alloy with minimal carbon and molybdenum content. This alloy exhibits good corrosion resistance to oxidizing sulphuric and hydrochloric acids, as well as chloride solutions.

Grade 904L is a low carbon variation of 304 or 18-8 stainless steel. It is primarily used in gas and steam turbine blades, hot water tanks, chemical plants, nuclear reactors and other demanding applications which require high corrosion resistance. Grade 904L is used because of its superior mechanical properties over grade 304 stainless steel. The alloy has a high tensile strength to weight ratio and is 100% nonmagnetic which makes it ideal for vibration dampening applications like kitchen sinks.

 It gets magnetic when higher alloying elements are added to the mix so don’t worry about it being magnetic. Grade 904L has a better resistance to localized corrosion such as pitting and crevice corrosion than grade 304 stainless steel but it isn’t recommended for use in environments where the majority of corrosion happens under an anaerobic condition such as in acidic solutions or in chloride rich environments (pools).

Stainless Steel 904l sheets is one of the most proven and versatile stainless steel grades. It offers excellent corrosion resistance combined with high creep resistance, good weldability and high strength at elevated temperatures.

Grade 904L is a nonoxidizing martensitic stainless steel with high strength, good ductility and excellent resistance to surface erosion at elevated temperatures. Unlike most austenitic products, Grade 904L is substantially nonmagnetic after tensile or cold forming. The high chromium content provides both corrosion resistance and high temperature properties.

Stainless Steel 904L Sheets is a low carbon, high alloy austenitic stainless steel. It has a high degree of resistance to both atmospheric and other forms of corrosion and is highly resistant to localized pitting.

904L is a low carbon, high alloy austenitic stainless steel which is widely used in applications where the corrosion properties of AISI 316L and AISI 317L are not adequate. The addition of copper to this grade gives it greatly improved resistance to strong reducing acids, particularly sulphuric acid. It is also highly resistant to stress corrosion cracking and pitting in chloride bearing environments.

In the oil and gas industry, 904L is often used in sour service environments where hydrogen sulfide (H2S) is present. It has also been successfully used in offshore oil and gas production platforms in sea water with chlorides present. In these cases, 904L has shown to provide superior corrosion resistance over conventional austenitic stainless steels such as 316L and 317L.

In the chemical process industry, 904L is used in handling sulfuric acid, phosphoric acid, acetic acid and numerous other acids. Due to its high resistance to pitting and crevice corrosion, it is also often used in chlorinated environments such as swimming pools and paper mills.

In the nuclear industry, 904L is specified for use in nuclear reactors because of its low carbon content which helps to prevent embrittlement of welds due to formation of martensite during cooling after welding.