AISI 329 Bolting Products
AISI 329 is listed in the DUPLEX STAINLESS STEEL material family. The reference data below should be checked against the governing product specification, product form and delivery condition before selection or certification.
The reference chemistry table for AISI 329 lists Carbon (C): 0.05% Max; Silicon (Si): 1.00% Max; Manganese (Mn): 2.00% Max; Phosphorus (P): 0.035% Max. Confirm exact limits and analysis tolerances against the governing standard and product form.
The mechanical-property table for AISI 329 lists Tensile Strength: 620 – 800 MPa; Yield Strength: 450 Minimum MPa; Elongation: 20 Minimum %; Hardness: 260 Maximum HB. These are reference entries; supplied condition, dimensions, test method and governing specification control the requirements, and the figures are not design allowables.
Werkstoff / EN cross-reference for AISI 329: 1.4480. This comparison does not guarantee interchangeability; confirm chemistry, product form and condition against the governing specification.
View Technical Information →Standard identification and material designation information for AISI 329 Duplex Stainless Steel.
The reference chemistry table lists Carbon (C): 0.05% Max; Silicon (Si): 1.00% Max; Manganese (Mn): 2.00% Max; Phosphorus (P): 0.035% Max. Confirm the governing standard, product analysis tolerances and product form before ordering.
| Element | Symbol | Composition |
|---|---|---|
| Carbon | C | 0.05% Max |
| Silicon | Si | 1.00% Max |
| Manganese | Mn | 2.00% Max |
| Phosphorus | P | 0.035% Max |
| Sulfur | S | 0.015% Max |
| Chromium | Cr | 25.00 – 28.00% |
| Nickel | Ni | 4.50 – 6.50% |
| Molybdenum | Mo | 1.30 – 2.00% |
| Nitrogen | N | 0.05 – 0.20% |
| Iron | Fe | Balance |
The table reports Tensile Strength: 620 – 800 MPa; Yield Strength: 450 Minimum MPa; Elongation: 20 Minimum %; Hardness: 260 Maximum HB as reference data for AISI 329. Actual requirements depend on condition, dimensions, test method and specification; these values are not design allowables.
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | 620 – 800 | MPa |
| Yield Strength | 450 Minimum | MPa |
| Elongation | 20 Minimum | % |
| Hardness | 260 Maximum | HB |
AISI 329 provides a combination of high mechanical strength and corrosion resistance suitable for demanding industrial and chemical service conditions.
Duplex microstructure provides higher strength compared with many conventional austenitic stainless steels.
Chromium, nickel and molybdenum provide resistance to general corrosion in demanding environments.
Duplex stainless steel structure offers improved resistance to chloride stress corrosion cracking.
Can be fabricated and welded using suitable procedures for duplex stainless steels.
AISI 329 is selected for applications requiring high strength and corrosion resistance in demanding industrial environments.
Equipment and components exposed to demanding chemical and corrosive environments.
Components requiring corrosion resistance in chloride-containing and marine environments.
Pump and valve components requiring strength and corrosion-resistant performance.
Mechanical and process equipment used in demanding industrial applications.
Consider chloride concentration, chemical composition and operating temperature when selecting AISI 329.
Appropriate fabrication and welding procedures should be used to maintain the duplex microstructure and material performance.
AISI 329 is suitable where higher mechanical strength and corrosion resistance are required compared with conventional stainless steels.
The commonly listed Werkstoff / EN cross-reference for AISI 329 is 1.4480. Treat this as a grade comparison, not a guarantee of interchangeability. Verify chemistry, product form, condition and governing specification against the supplier certificate before substitution.
It is commonly used in chemical processing, marine equipment, pumps, valves and corrosion-resistant industrial equipment.
Yes. AISI 329 has an austenitic-ferritic duplex structure that provides a combination of strength and corrosion resistance.
Our engineering team can help you select suitable materials based on operating temperature, pressure and service conditions.