1.4460 / AISI 329 steel is a duplex stainless steel with austenitic-ferritic structure, alloyed with chromium, nickel and molybdenum, designed to offer:
• High mechanical strength.
• Good corrosion resistance in aggressive chemical environments.
• Excellent stability under high chemical and mechanical stress.
This material is also marketed under the names 10RE51 and SS44®, and is particularly suitable for high-stress applications.

Reference Standards:

• EN X3CrNiMoN27-5-2
• AISI 329
• UNS S32900
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Chemical Composition (%)

Element Content (%)
Carbon (C) ≤0.05
Silicon (Si) ≤1.00
Manganese (Mn) ≤2.00
Phosphorus (P) ≤0.035
Sulphur (S) ≤0.015
Chromium (Cr) 25.0–28.0
Molybdenum (Mo) 1.30–2.00
Nickel (Ni) 4.50–6.50
Nitrogen (N) 0.05–0.20
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Mechanical Properties at 20°C

Property Value
Hardness HB30 ≤260
Yield Strength Rp0.2% ≥450 MPa
Tensile Strength (Rm) 620–800 MPa
Elongation (A5) ≥20%
Modulus of elasticity 200 GPa
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Physical Properties

at 20°C
Property Value
Density 7.8 g/cm³
Specific Heat Capacity 500 J/kg·K
Thermal Conductivity 15 W/m·K
Electrical Resistivity 0.8 Ω·mm²/m
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Key Features

• Excellent combination of mechanical strength and corrosion resistance.
• Good machinability and weldability, use of filler 1.4330, 1.4337, 1.4430 recommended.
• Stable even in highly aggressive environments.
• Suitable for marine applications and components subject to high mechanical stress.
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Available Formats

• Bars
• Tubes / Pipes
• Fittings
• Forged or cast parts
• Custom-made components
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Industrial Applications

Ideal for:
• Shipbuilding.
• Compressor wheels.
• Structural components exposed to corrosive agents.
• Chemical and petrochemical plants.
• Water treatment plants.