Stainless Steel 904L (UNS N08904,1.4539) plate stands out as a premium material designed to perform in the harshest of environments. Its high alloy content, which includes significant amounts of nickel, chromium, and molybdenum, ensures superior resistance to a wide range of corrosive media. The combination of excellent mechanical strength, outstanding weldability, and robust corrosion resistance makes it indispensable in chemical processing, oil and gas production, marine applications, and beyond.
ASTM A240 SA240 Stainless steel 904L Plate & Sheet Manufacturer
HT PIPE is a well-known stockist and exporter. We are a Stainless Steel 904L Plate material supplier with 15+ export experience. We not only provide pipes, ASTM A240 UNS N08904 Plate, round bars, but also pipe fittings, flanges, etc. Contact us for more information and prices for free.
Manufacture Process of Stainless Steel 904L Plate
SS 904L Plate Cutting
Laser or plasma cutting is preferred for ss 904L steel plate cutting to ensure smooth cuts and small heat-affected zones. Mechanical cutting requires the use of carbide tools (such as CBN blades), the cutting speed is reduced to 1/3 of carbon steel, and sulfur- or chlorine-containing lubricants are used for sufficient cooling. After cutting, burrs and oxide layers must be thoroughly removed to avoid stress concentration.
UNS N08904 Plate Forming
Cold forming (bending, stamping) must be carried out in steps and properly annealed (solution treatment) to eliminate stress; hot forming requires the material to be preheated to 800-1000℃ to avoid exceeding 1150℃ to cause coarse grains. Mold design should use low friction coefficient materials (such as chrome-plated tool steel) to reduce wear during the forming process.
SS 1.4539 Plate Welding
TIG welding or MIG welding is recommended, with ER385 welding wire (high Ni/Cr/Mo content) to ensure SS 904L plate weld corrosion resistance. Use low current and fast welding speed process, and control the interlayer temperature below 150℃. After welding, pickling and passivation (nitric acid + hydrofluoric acid solution) are required, and if necessary, solution treatment at 1050-1100℃ is performed to eliminate stress.
Stainless Steel 904L Sheet Surface treatment
Pickling and passivation use 20-25% nitric acid + 2-5% hydrofluoric acid solution to remove oxide scale, mechanical polishing to Ra 0.8μm or less to avoid iron filings causing rust. In extreme environments, epoxy resin or PTFE can be coated to enhance protection.
SS N08904 Plate Heat treatment
Solution treatment requires water quenching after keeping at 1050-1100℃ for 1-2 hours to restore the corrosion resistance and ductility of the material. If the processing stress is large, stress relief annealing can be performed at 850-900℃ for 0.5-1 hour.
Material Testing of Stainless Steel 904L Plate
HT PIPE ensures that all our materials go through strict quality tests before dispatching them to our clients.
- Mechanical Testing Such as Tensile of Area
- Hardness Test
- Chemical Analysis – Spectro Analysis
- Positive Material Identification – PMI Testing
- Flattening Test
- Micro and MacroTest
- Pitting Resistance Test
- Flaring Test
- Intergranular Corrosion (IGC) Test
Why should you Choose Stainless Steel 904L Plate?
SS 904L Plate High Corrosion Resistance
904L stainless steel plate withstands aggressive acids and chloride-rich conditions due to its high chromium, nickel, molybdenum, and copper content, making it ideal for harsh chemical, refinery, and marine environments.
UNS N08904 Plate Durability
SS 904L Plate delivers high tensile and yield strengths while maintaining ductility, ensuring components endure high stresses over long periods and reducing maintenance costs.
Stainless Steel 1.4539 plate Weldability and Formability
The low carbon content facilitates superior weldability using standard techniques and allows easy forming into complex shapes with conventional methods.
904L Stainless Steel Sheet Thermal Stability and Non-Magnetic Nature
904L remains stable across a wide temperature range and is non-magnetic, offering both reliable performance under thermal cycling and an attractive polished finish.
