AISI 904L / 1.4539 Stainless Steel

Stainless Steel AISI 904L / EN 1.4539 / 06ХН28МДТ: Properties, Applications, and Features

✅ General Technical Characteristics

Stainless steel AISI 904L (EN 1.4539, 06ХН28МДТ) is a high-alloy austenitic stainless steel with increased nickel, chromium, molybdenum, and copper content, providing exceptional corrosion resistance. Due to its properties, this alloy is suitable for use in aggressive environments, including those with high concentrations of acids and chlorides.

Main Characteristics:

• High corrosion resistance in acid-containing environments.
• Improved resistance to pitting and crevice corrosion.
• Excellent mechanical strength and plasticity.
• Good weldability and machinability.
• Long-term performance in high-temperature environments.

🔬 Chemical Composition AISI 904L / EN 1.4539 (%):

• Carbon (C): ≤ 0.02
• Silicon (Si): ≤ 1.0
• Manganese (Mn): ≤ 2.0
• Phosphorus (P): ≤ 0.030
• Sulfur (S): ≤ 0.010
• Chromium (Cr): 19.0 – 23.0
• Nickel (Ni): 23.0 – 28.0
• Molybdenum (Mo): 4.0 – 5.0
• Copper (Cu): 1.0 – 2.0

💡 The high nickel and molybdenum content ensures enhanced corrosion resistance in aggressive environments.

🏭 Applications

Steel AISI 904L (EN 1.4539, 06ХН28МДТ) is widely used in industries where maximum corrosion resistance and durability are required.

Main Application Areas:

• Chemical and petrochemical industry (storage tanks, pipelines, reactors).
• Marine industry (ship components, marine structures, water treatment systems).
• Acid processing equipment manufacturing.
• Pharmaceutical and food industry (storage tanks for aggressive substances).
• Energy sector (heat exchangers, gas turbines, boilers).

📊 Mechanical Properties

• Tensile Strength (Rm): 490 – 690 MPa
• Yield Strength (Rp0.2): ≥ 220 MPa
• Hardness (HB): ≤ 210 HB
• Elongation (A5): ≥ 35 %

⭐ Features

• Maximum corrosion resistance – excellent durability in environments with high acid and chloride content.
• High plasticity and strength – suitable for structures subjected to significant mechanical loads.
• Heat resistance – maintains stability at high temperatures.
• Excellent weldability – compatible with most welding methods without additional heat treatment.
• Longevity – retains its properties even in the most aggressive operating conditions.

AISI 904L / EN 1.4539 steel delivery forms