904L Stainless Steel (1.4539)

904L stainless steel combines strength with excellent formability, making it a reliable material for demanding environments. Its key mechanical properties include:

• Tensile Strength: 515–690 MPa
• Yield Strength: 215–390 MPa
• Elongation at Break: 35–45%
• Hardness: 217–269 HB (Brinell)

These characteristics enable 904L to perform well under both structural stress and corrosive exposure. Its elongation ensures easy fabrication, while the broad tensile range supports use in high-pressure and heavy-duty applications.

The physical profile of 904L is engineered for performance in extreme conditions. Typical values include:

• Density: 8.0 g/cm³
• Melting Point: 1320–1390 °C (2400–2550 °F)
• Modulus of Elasticity: 193 GPa (28 x 10⁶ psi)

These attributes contribute to its ability to withstand thermal cycling, mechanical pressure, and corrosive attack, key for marine, chemical, and processing environments.

Yes, several enhanced versions of 904L are available to meet specific performance demands:

904L Super Austenitic – Higher molybdenum content boosts pitting and crevice corrosion resistance

904L Maraging – High strength and corrosion resistance for aerospace and nuclear applications

904L Duplex – Combines ferritic strength with austenitic corrosion resistance

904L Hyper Duplex – Advanced variant for extreme corrosion and stress environments

904L Super Austenitic-Duplex – Hybrid alloy offering enhanced mechanical and corrosion performance

Each variant is tailored for different challenges, from aggressive acids to high-stress mechanical applications.