Everything You Need to Know About Stainless Steel 904L Plates

Stainless Steel 904L Plates have been making headlines for being one of the best corrosion-resistant alloys. They are a perfect solution for various industries, including chemical processing, petrochemicals, pharmaceuticals, etc. But what makes these plates so special?

This blog post explores everything you need about Stainless Steel 904L Plates, including their composition, properties, applications, and benefits.

What are Stainless Steel 904L Plates?

Stainless Steel 904L Plates are special stainless steels with low carbon levels and high amounts of molybdenum, chromium, and nickel. These plates have excellent corrosion resistance to chlorides, acids, and other harsh chemicals. It is also highly resistant to pitting and stress corrosion cracking in tough environments such as seawater applications. Its superior weldability makes it the metal of choice for corrosive industrial applications, including food processing equipment.

Composition of Stainless Steel 904L

904L stainless steel is composed of iron, chromium (24-26%), nickel (19-21%), molybdenum (4–5%) and trace amounts of other elements such as carbon, manganese, silicon, phosphorus and sulfur. This combination creates a highly corrosion-resistant alloy grade used widely in applications ranging from pulp and paper processing to chemical processing equipment. 904L also has excellent resistance to acids making it suitable for use in acid-production environments while maintaining its strength at high temperatures. 904L stainless steel is composed of a low carbon content (0.020%), 20-23% chromium, 23-28% nickel, 4.5-5.5% molybdenum, 1.45-2% copper, 0.1-0.3% nitrogen, and iron as the remaining balance components. This alloy features excellent welding and forming characteristics. It has superior corrosion resistance to other alloys thanks to the increased molybdenum content making it highly resistant to crevice corrosion and stress corrosion cracking in chloride environments.

Properties of 904L Stainless Steel

904L Stainless Steel is a high-alloy Austenitic stainless steel with low carbon content. It provides excellent corrosion resistance in various environments, particularly against sulfuric and phosphoric acids. It offers superior general and localized corrosion resistance compared to other standard grades of stainless steel. Features such as outstanding formability, weldability, toughness and strong work-hardening properties make 904L ideal for complex engineering applications. Its higher molybdenum content increases its strength, making it more robust than conventional austenitic 316 or 304 grades of stainless steel.

Applications of 904L Stainless Steel

904L stainless steel is a low-carbon, high-nickel alloy with excellent corrosion resistance properties. It has many applications in multiple industries, including aerospace, chemical processing, medical implants, construction and architecture. Due to its strong acid resistance properties, 904L stainless steel is often used in pickling and passivation tanks. It can be used for trays, carts and vials in pharmaceutical applications because of its non-reactive nature. It’s also used in kitchen appliances like sinks and cookware due to its ability to resist degradation from heat exposure and oxidation over time


904L stainless steel is a high-alloy austenitic stainless steel with four to five times more molybdenum than most other grades. Its high chromium and nickel content offers excellent corrosion resistance against pitting, crevice corrosion, and stress corrosion cracking. The addition of molybdenum further enhances its strength and workability, making it suitable for demanding applications like aerospace components, medical devices, petrochemical processing equipment, and food processing machinery. Additionally, it boasts superior weldability compared to conventional 304/304L grade alloys.


In conclusion, Stainless Steel 904L Plates are an excellent material choice for various industrial applications. Their high corrosion resistance and other properties make them reliable in terms of usage. If you’re working with critical operations, food processing equipment, or chemical plants, Stainless Steel 904L Plates are an excellent option.

Everything You Need to Know About Stainless Steel 904L Plates

by Seamac Piping Solutions Inc. time to read: 2 min