904L / 1.4539 Stainless Steel| Intamet Ltd
904L is a type of stainless steel that is resistant to strong acids and chloride-containing substances.
It is also known as UNS N08904 or 1.4539. This makes it a popular choice for use in a wide range of chemical processing, petrochemical, and marine applications.
904L, also known as 1.4539, is a high-alloy austenitic stainless steel. It's a special alloy with low carbon, high nickel, and molybdenum. It's great at resisting corrosion, especially in very acidic places.
904L is very resistant to pitting and crevice corrosion. This makes it ideal for use in challenging environments such as chemical processing, oil and gas production, and marine settings.
904L has good resistance to corrosion due to its high nickel and molybdenum content. Its low carbon content prevents carbide precipitation and intergranular corrosion. Additionally, the high copper content gives 904L improved resistance to reducing acids, such as sulfuric and phosphoric acids.
Physical & Mechanical Properties of 904L / 1.4539
The physical properties of 904L are:
- Density: 8 g/cm3
- Melting Point: 1320-1390 °C (2400-2550 °F)
- Modulus of Elasticity: 193 GPa (28 x 106 psi)
The mechanical properties of 904L at room temperature are:
- Tensile Strength: 515-690 MPa (75-100 ksi)
- Yield Strength: 215-390 MPa (31-57 ksi)
- Elongation: 35-45%
- Hardness (Brinell): 217-269 HB
Due to its excellent corrosion resistance and high strength, 904L is commonly used in a wide range of industries and applications, including:
- Chemical processing
- Oil and gas production
- Marine environments
- Pharmaceutical and food processing
- Pulp and paper production
- Power generation
The composition, properties, and characteristics of 904L can differ depending on the maker or supplier. It is advised to review the analysis certificate before using it in any situation.
Chemical Composition of 1.4539/904L
The chemical composition of 904L typically includes:
- Carbon (C): 0.020% maximum
- Manganese (Mn): 2.00% maximum
- Phosphorus (P): 0.045% maximum
- Sulfur (S): 0.035% maximum
- Chromium (Cr): 19.00-23.00%
- Nickel (Ni): 23.00-28.00%
- Molybdenum (Mo): 4.00-5.00%
- Copper (Cu): 1.00-2.00%
- Nitrogen (N): 0.10% maximum
- Iron (Fe): Balance
904L has good resistance to corrosion due to its high nickel and molybdenum content. Its low carbon content prevents carbide precipitation and intergranular corrosion.
Additionally, the high copper content gives 904L improved resistance to reducing acids, such as sulfuric and phosphoric acids.
Variants of 904
904L is a type of stainless steel alloy that contains high levels of chromium, nickel, and molybdenum. There are several variants of 904L, including:
- 904L Super Austenitic: This variant of 904L has a higher molybdenum content than standard 904L, which makes it more resistant to pitting and crevice corrosion.
- 904L Maraging: This variant of 904L is used in aerospace and nuclear applications due to its high strength and corrosion resistance.
- 904L Duplex is a type of stainless steel. It has the characteristics of both ferritic and austenitic steels. This makes it strong and resistant to corrosion.
- 904L Hyper Duplex is a stronger and more corrosion-resistant type of stainless steel compared to standard duplex 904L.
- The 904L Super Austenitic-Duplex is a material that is both strong and corrosion-resistant. It combines the properties of the 904L Super Austenitic and 904L Duplex materials.
It's important to note that these variants may have different chemical compositions, mechanical properties and application.
Intamet offers 314 in a wide range of forms, including the below: