ASTM A240 904L / N08904 / 1.4539 Stainless Steel Plate 0.6 - 30.0mm 904L Stainless Steel

Grade 904L stainless steel is a non-stabilized austenitic stainless steel with low carbon content. This high alloy stainless steel has added copper to improve its resistance to strong reducing acids, such as sulphuric acid. The steel is also resistant to stress corrosion cracking and crevice corrosion. Grade 904L stainless steel is non-magnetic, and offers excellent formability, toughness and weldability. Grade 904L contains high amounts of expensive ingredients, such as molybdenum and nickel. Today, most of the applications that employ grade 904L are replaced by low-cost duplex stainless steel 2205.

Grade 904L stainless steels have excellent resistance to warm seawater and chloride attack. The high resistance of grade 904L against stress corrosion cracking is due to the presence of high amounts of nickel in its composition. Moreover, the addition of copper to these grades develops resistance to sulphuric acid and other reducing agents in both aggressive and mild conditions.

The corrosion resistance of grade 904L is intermediate between super austenitic grades, with 6% molybdenum content, and standard 316L austenitic grades. Grade 904L is less resistant   than grades 304L and 310L, which are free of molybdenum. This steel grade needs to be solution treated following cold working, to achieve maximum stress corrosion cracking resistance under critical environments.

Feather of   904L Stainless Steel

• Non-magnetic

• Stronger corrosion properties than Type 316L an 317L

• Good resistance to sulphuric, phosphoric and acetic acids

• High resistance to crevice and stress corrosion cracking

• Excellent formability and weldability

Chemical Composition of  904L Stainless Steel

Typical application of 904L Stainless Steel

• Cooling equipment for seawater

• Chemical processing of sulphuric, phosphoric and acetic acids

• Heat exchangers

• Condenser tubes

• Gas washing

• Control and instrumentation

• Oil and gas industry

• Pharmaceutical production

• Wiring in electrostatic precipitators

Size of 904L stainless steel plate in stock