Leading Supplier of Stainless Steel 904L
Specifications for SUS904L
UNS N08904 | 1.4539 | SS904L
Properties of Stainless Steel Type 904L
Grade 904L ( 1.4539 ) stainless steel is a non-stabilized austenitic stainless steel with low carbon content. This high alloy stainless steel is added with 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. Stainless Steel 904L is non-magnetic, and offers excellent formability, toughness and weldability.
Chemical Properties of Stainless Steel 904L
Fe | <0.02% C | 19-23% Cr | 23-28% Ni | 4-5% Mo | <2.0% Mn | <1.0% Si | <0.045% P | <0.035% S | 1.0-2.0% Cu
Mechanical Properties of SUS904L
|Grade||Tensile Strength (MPa) min||Yield Strength 0.2% Proof (MPa) min||Elongation (% in 50mm) min||Hardness (Rockwell B (HR B))||Hardness (Brinell (HB))|
|SUS 904L||490||220||36||70-90 typical||150|
Physical Properties of SS904L
|Mean Co-eff of Thermal Expansion (µm/m/°C)||Mean Co-eff of Thermal Expansion (µm/m/°C)||Mean Co-eff of Thermal Expansion (µm/m/°C)||Thermal Conductivity|
|Specific Heat 0-100°C|
|0-100°C||0-315°C||0-538°C||At 20°C||At 500°C|
SS904L stainless steels have excellent resistance to warm seawater and chloride attack.
The high resistance of SUS 904L stainless steel 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 904L is intermediate between super austenitic grades, with 6% molybdenum content, and standard SUS316L austenitic grades.
Stainless steel grade 904L is less resistant to nitric acid than grades SUS304L and SUS310L, 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.
SUS904L stainless steels offer good oxidation resistance. However, the structural stability of this grade collapses at high temperatures, particularly above 400°C.
Because of the high carbon content, these alloys have an abrasive action on cutting tools. In the annealed condition, their machinability rating is about 40% compared to Bessemer oven stock (AISI B1112). As heat treated, the 440 series stainless steel are difficult to machine because of their high hardness. For parts that require extensive machining, the free-machining versions, SUS 440F or SUS440F Se, offer improved machining properties.
Stainless steels SUS904L ( N08904 ) can be solution heat-treated at 1090 to 1175°C, following by rapid cooling. Thermal treatment is suitable for hardening these grades.
Welding of grade 904L ( 1.4539 ) stainless steels can be performed using all conventional methods. This grade does not require pre-heat and post-weld heat treatments. SS904L can be subjected to hot cracking in constrained weldment. SS904L electrodes and rods are used for welding grade 904L steels according to AS 1554.6.
SS904L stainless steels are high purity steels with low sulphur content. They can be machined using any standard methods. These grades can be readily bent to a small radius
Applications of Stainless Steel SUS904L
SUS 904L /904L Stainless Steel can be used in :
Chemical plant, oil refinery, petrochemical plants, bleaching tanks for the paper industry, combustion gas desulfurization plants, application in sea water, sulphuric and phosphoric acid. Due to the low C-content, the resistance to intergranular corrosion is also guaranteed in the welded condition.
Our Sales and Supplier Network in SS904L / SUS904L / 904LStainless Steel :
With over 15 years of experience and strong global sourcing networking in the market, we are proud to be the SS 904L Stainless Steel Supplier and Exporter to :
- Australia, Pakistan, Malaysia, Singapore, Taiwan, China, Vietnam, Belgium, Japan, South Korea, Philippines, France, United Kingdom, Indonesia, Thailand, Hong Kong, China, Sweden, United States, Dubai, Finland, Brunei, Germany.
Besides, we have the full range of Stainless Steel sheets, Stainless Steel Round Bar, Stainless Steel Rods, Stainless Steel Plate which consists of
– 300 Series Stainless Steel : SUS304, SUS304L, SUS309, SUS310, SUS316Ti, SUS317, SUS321, SUS347
– 400 Series Stainless Steel : SUS403, SUS410, SUS420, SUS431, SUS440C, SUS630, SUS904L
– Nitronic 30, Nitronic 50, Nitronic 60
– Super Duplex S32750, S32760