Dnya Stainless Steel
Linkedin

904L Stainless Steel Sheet & Plate

  • Home  
  • 904L Stainless Steel Sheet & Plate

904L Stainless Steel Sheet & Plate (UNS N08904/1.4539)

904L stainless steel sheet and plate, classified as UNS N08904, is an austenitic stainless steel alloy that is highly alloyed, containing high levels of nickel (around 25%), chromium (around 20%), and significant additions of molybdenum (4-5%) and copper (1-2%). These alloying elements provide 904L with exceptional resistance to a wide range of corrosive environments, including those involving chlorides, sulfuric acid, and other acidic solutions. This makes it one of the most corrosion-resistant stainless steels available.

Key Features

  • Superior Corrosion Resistance: 904L stainless steel excels in environments exposed to chlorides, sulfuric acid, and other aggressive chemicals. The high nickel and molybdenum content significantly improve its resistance to pitting, crevice corrosion, and stress corrosion cracking, even in highly corrosive environments like seawater or chemical processing environments.
  • Resistance to Sulfuric Acid: 904L is highly resistant to corrosion from sulfuric acid, making it ideal for chemical processing and industries dealing with sulfuric acid or other strong acids.
  • High Strength: The alloy offers excellent tensile strength and good ductility, making it suitable for use in both structural and high-stress applications.
  • Weldability: 904L has good weldability, and its resistance to carbide precipitation during welding allows for strong, durable welds without compromising its corrosion resistance.
  • Heat Resistance: 904L retains its corrosion resistance at elevated temperatures, though it is not designed for prolonged exposure to temperatures above 400°C due to a potential loss in strength.

Technical Specifications:

  • UNS Number: NO8904
  • DIN/EN Designation: 1.4539

Available Thickness

3/16″1/4″3/8″1/2″5/8″3/4″
4.8mm6.3mm9.5mm12.7mm15.9mm19mm
1″1 1/4″1 1/2″1 3/4″2″
25.4mm31.8mm38.1mm44.5mm50.8mm
904l-stainless-steel-sheet-plate

Application

  • Automotive
  • Chemical and Pharmaceutical
  • Fertilizer
  • Food Processing and Handling
  • Manufacturing
  • Mining
  • Oil & Gas
  • Phosphate Mining

Standard

  • ASTM A240 / A240M
  • ASTM A276 / A276M
  • ASTM A312 / A312M
  • ISO 15510
  • EN 10088-2
  • IN 10204
  • HE G4304
  • HE G4305
  • ASME SA240 / SA240M
  • ASME SA312 / SA312M

Corrosion Resistance

  • High-Temperature Corrosion Resistance: Stainless steel 310S is specifically designed to withstand high temperatures, making it suitable for applications in environments where both heat and oxidation are concerns. It can handle temperatures up to around 1100°C (2012°F) intermittently and up to 950°C (1742°F) continuously.
  • Oxidation Resistance: Its high chromium content (about 25%) contributes to excellent oxidation resistance, making it well-suited for applications where exposure to air and heat can cause oxidation and scaling.
  • Chemical Resistance: 310S is resistant to a range of chemicals, including sulfur dioxide, nitric acid, and certain acids, though it is not as resistant to acids as some other stainless steel grades like 316.
  • Sulfur Resistance: It also has better resistance to sulfur compounds compared to many other stainless steels, making it a good choice for environments where sulfur is present.

904L Chemical Composition

ElementComposition (%)
Carbon (C)≤ 0.020
Manganese (Mn)1.0 – 2.0
Silicon (Si)≤ 1.0
Phosphorus (P)≤ 0.045
Sulfur (S)≤ 0.035
Chromium (Cr)19.0 – 23.0
Nickel (Ni)23.0 – 28.0
Molybdenum (Mo)4.0 – 5.0
Copper (Cu)1.0 – 2.0
Nitrogen (N)≤ 0.10

904L Physical Properties

PropertyValue
Density~8.0 g/cm³
Melting Point~1400 – 1450°C
Thermal Conductivity~14 W/m·K
Electrical Resistivity~1.5 x 10^-7 Ω·m
Coefficient of Thermal Expansion~15 x 10^-6/K (25 – 100°C)

904L Mechanical Properties

Property Value
Yield Strength (Rp0.2) ~220 MPa
Tensile Strength (Rm) ~490 MPa
Elongation (A) ~40%
Hardness (Rockwell B) ~90 HB

Fabrication Data

  • Welding: 904L can be welded using conventional methods like TIG (Tungsten Inert Gas) and MIG (Metal Inert Gas) welding. Proper heat control and filler material matching are important to maintain corrosion resistance.
  • Machining: This alloy is machinable with the appropriate tools and speeds. It tends to be tougher to machine compared to other stainless steels due to its high nickel and molybdenum content.
  • Forming: The alloy has good formability and can be processed using standard forming techniques. However, due to its high strength, it may require more force compared to lower-strength stainless steels.
  • Heat Treatment: 904L is not hardenable by heat treatment. It is typically used in the annealed condition.
Send a Message

Feel Free to Say Hello or Send Your Questions

For more information or to request a quote, contact us today to discuss how Stainless Steel Plate 304H can meet your specific project needs.