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Stainless Steel 904L Sheet Plate – Composition, Properties, and Uses

Stainless steel 904L sheet plate

Stainless steel is a popular material used in various industries due to its excellent properties, including high resistance to rust and corrosion. One of the most sought-after materials in the stainless steel family is a 904L sheet plate. This type of stainless steel is known for its superior corrosion resistance, and it is widely used in chemical processing, oil and gas, and other industries that require extreme durability and strength. This blog post will examine stainless steel 904L sheet plates and their composition, physical and mechanical properties, uses, heat treatment, and corrosion resistance.

What is Stainless Steel 904L sheet plate?

The SS 904L sheet plate is a high-alloy austenitic stainless steel with low carbon content. It has excellent corrosion resistance in a wide range of media, good weldability and formability, and relatively higher strength than other austenitic stainless steel grades. The combination of these properties makes it suitable for applications in the chemical processing, oil & gas, and petrochemical industries are some examples.

Stainless Steel 904L Sheet Plate Composition

904L Stainless steel plate is a low carbon, high alloy austenitic stainless steel that contains significant amounts of nickel and molybdenum. The high level of nickel and molybdenum in its composition enhances its resistance to chloride ion stress corrosion cracking, which makes it ideal for use in aggressive environments. The addition of copper in its composition provides superior resistance to sulphuric acid and other reducing acids.

Tensile Strength (MPa) min Yield Strength 0.2% Proof (MPa) min Elongation (% in 50mm) min Hardness
Rockwell B (HR B)
Hardness
Brinell (HB)
490 220 36 70-90 typical 150

Stainless Steel 904L Sheet Plate Physical Properties

The stainless steel 904L sheet has excellent physical properties that make it suitable for use in extreme conditions. It can withstand temperatures ranging from -196°C to 450°C, making it ideal for cryogenic applications and operations requiring high-temperature resistance. It also has a density of 7.98 g/cm³ and a melting point of 1300°C, making it highly durable and resistant to wear and tear.

Stainless Steel 904L Sheet Plate Mechanical Properties

Stainless steel 1.4539 plates has outstanding mechanical properties, which include high tensile strength, excellent elongation, and good flexibility. Its tensile strength is about 490 MPa, with a yield strength of 216 MPa. These properties make it perfect for operations and applications requiring high strength and toughness.

Tensile Strength (MPa) min Yield Strength 0.2% Proof (MPa) min Elongation (% in 50mm) min Hardness
Rockwell B (HR B)
Hardness
Brinell (HB)
490 220 36 70-90 typical 150

Stainless Steel 904L Sheet Plate Equivalent

STANDARD WERKSTOFF NR. UNS JIS BS KS AFNOR EN
SS 904L 1.4539 N08904 SUS 904L 904S13 STS 317J5L Z2 NCDU 25-20 X1NiCrMoCu25-20-5

Stainless Steel 904L Sheet Plate Uses

SB 625 UNS N08904 sheet plate is widely used in various industries, including chemical processing, oil and gas, and pharmaceuticals. It is suitable for use in desalination plants, providing excellent chloride ion corrosion resistance. It is also used in heat exchangers, pressure vessels, and in the production of chemical tanks and pipes.

Stainless Steel 904L Sheet Plate Heat Treatment

The stainless steel 904L sheet plate is not hardened by heat treatment. However, annealing can be performed to reduce hardness and increase flexibility. This type of stainless steel can also be welded using various welding techniques, including gas tungsten arc welding, gas metal arc welding, and shielded metal arc welding.

Stainless Steel 904L Sheet Plate Corrosion Resistance

Stainless steel 904L sheet plate is known for its superior corrosion resistance, particularly in harsh environments. It is resistant to crevice corrosion, stress corrosion cracking, and pitting. It is also highly resistant to various acids, including sulphuric acid, hydrochloric acid, and phosphoric acid. Its resistance to corrosion makes it an ideal material for use in harsh environments, including marine and industrial settings.

Conclusion:

The stainless steel 904L sheet plate is a highly durable and reliable material that provides superior resistance to corrosion, making it ideal for use in extreme conditions. Its physical and mechanical properties suit various industries, including chemical processing, oil and gas, and pharmaceuticals. The addition of copper, nickel, and molybdenum in its composition enhances its corrosion resistance, while its ability to withstand high temperatures makes it ideal for cryogenic applications. In conclusion, stainless steel 904L sheet plate is a versatile and durable material that provides excellent resistance to corrosion, making it a popular choice for various industrial applications.

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