General Description

AISI 329 (1.4460) is an austenitic-ferritic stainless steel, which has excellent machinability and high mechanical strength.

AISI 329 has a Pitting Resistance Equivalent (PRE*) of ≥31. AISI 329 has very good resistance to stress corrosion cracking in chloride environments and good resistance to general corrosion in acidic media.

AISI 329 is especially suited for the manufacture of components for pumps and other equipment used in alkaline environments commonly found in the pulp and paper industry.

Chemical Composition

Grade Ni% Cr% Fe% Mo% C% Mn% Si% S% P% N%
329 4.5-6.5 25.0-28.0 Bal. 1.0-3.0 Max 0.05 Max 1.0 Max 1.0 Max 0.03 Max 0.035 0.05-0.20


UNS S32900

Werkstoff Nr. 1.4460


329 Bar/Forging: ASTM A276/A479

329 Sheet/Plate: ASTM A240

Physical Properties

Density:7.8 g/cm3

Specific heat 20°C: 500 J/(kg °C)

Thermal conductivity 20°C: 15 W/(m °C)

Mechanical Properties

Solution Annealed

Tensile: Min 620 MPa

Yield Rp0.2 : Min 485 MPa

Elongation A5: Min 20%

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