Nitronic 50 / UNS S20910 / 1.3964 / XM-19

Alloy Nitronic 50: Properties, Applications, and Features

✅ General Technical Characteristics

Alloy Nitronic 50 is a high-alloy austenitic stainless steel with improved mechanical properties compared to traditional grades such as 316L and 317L. This material combines high strength, excellent corrosion resistance, and stability under extreme temperatures. Due to the addition of nitrogen and manganese, the alloy exhibits increased hardness and wear resistance.

Main Characteristics:

• Exceptional corrosion resistance in seawater and aggressive environments.
• Increased strength and hardness without the need for heat treatment.
• Excellent resistance to pitting and crevice corrosion.
• High fatigue strength under dynamic loads.
• Good weldability without the risk of hot cracking.

🔬 Chemical Composition of Nitronic 50 (%)

• Carbon (C): ≤ 0.06
• Silicon (Si): ≤ 1.0
• Manganese (Mn): 4.0 – 6.0
• Phosphorus (P): ≤ 0.04
• Sulfur (S): ≤ 0.03
• Chromium (Cr): 20.5 – 23.5
• Nickel (Ni): 11.5 – 13.5
• Molybdenum (Mo): 1.5 – 3.0
• Nitrogen (N): 0.2 – 0.4

💡 Nitrogen increases strength without reducing ductility, while manganese replaces part of the nickel, improving the alloy’s structure.

🏭 Applications

Alloy Nitronic 50 is in demand in industries requiring high corrosion resistance, mechanical strength, and durability.

Main Application Areas:

• Marine and shipbuilding industry (propeller shafts, hulls, fasteners).
• Oil and gas industry (pipelines, pump equipment, valves).
• Chemical and pharmaceutical industry (reactors, tanks, pipelines).
• Aerospace industry (engine components, fasteners, high-load components).
• Energy sector (turbine disks, heat exchangers, generator installations).

📊 Mechanical Properties

• Tensile Strength (Rm): 690 – 895 MPa
• Yield Strength (Rp0.2): ≥ 380 MPa
• Hardness (HB): ≤ 293 HB
• Elongation (A5): ≥ 35 %
• Modulus of Elasticity: 195 – 210 GPa

⭐ Features

• Improved strength and hardness – maintains excellent mechanical properties without heat treatment.
• High corrosion resistance – protects against rust and degradation in aggressive environments.
• Resistance to pitting and crevice corrosion – surpasses traditional stainless steels.
• Heat resistance – maintains property stability at elevated temperatures.
• Durability – extended service life in extreme operating conditions.

Nitronic 50 Grade Delivery Forms