UNS S44180 / 1.4418 / X4CrNiMo16-5-1

Duplex Alloy EN 1.4418 / 08X17N5M3: Properties, Applications, and Features

✅ General Technical Characteristics

Duplex alloy EN 1.4418 (08X17N5M3) is a high-quality stainless steel with enhanced mechanical strength and excellent corrosion resistance. Thanks to its balanced composition of chromium, nickel, and molybdenum, this alloy combines the advantages of austenitic and martensitic steels, ensuring outstanding strength, ductility, and durability.

Main Characteristics:

• High corrosion resistance in marine and industrial environments.
• Increased mechanical strength and wear resistance.
• Good weldability and machinability.
• Stability of mechanical properties under high loads.
• Excellent combination of ductility and hardness.

🔬 Chemical Composition EN 1.4418 / 08X17N5M3 (%):

• Carbon (C): ≤ 0.05
• Silicon (Si): ≤ 1.0
• Manganese (Mn): ≤ 1.5
• Phosphorus (P): ≤ 0.040
• Sulfur (S): ≤ 0.015
• Chromium (Cr): 15.0 – 17.0
• Nickel (Ni): 4.0 – 6.0
• Molybdenum (Mo): 0.8 – 1.5
• Nitrogen (N): ≤ 0.05

💡 The balanced composition of this alloy provides increased strength and corrosion resistance in demanding operating conditions.

🏭 Applications

Alloy EN 1.4418 (08X17N5M3) is widely used in industries requiring high mechanical strength and corrosion resistance.

Main Application Areas:

• Shipbuilding (hull components, propellers, deck equipment).
• Aerospace and automotive industry.
• Petrochemical and chemical industry (pipelines, valves, storage tanks).
• Production of industrial equipment and tools.
• Energy and mechanical engineering (turbine components, pump parts, shafts).

📊 Mechanical Properties

• Tensile Strength (Rm): 850 – 1050 MPa
• Yield Strength (Rp0.2): ≥ 550 MPa
• Hardness (HB): ≤ 290 HB
• Elongation (A5): ≥ 14 %

⭐ Features

• High corrosion resistance – ideal for use in aggressive environments.
• Excellent mechanical strength – withstands impact and mechanical loads.
• Wear resistance – ensures long-term durability of structures and components.
• Good weldability – allows the use of various welding methods.
• High load resistance – suitable for structures operating under extreme conditions.

Forms of delivery of products made of steel 1.4418 / 08X17H5M3