Description
ER329N Filler Wire TIG / ER329N Filler Wire MIG
ER329N Filler Wire is a Duplex Stainless Steel welding filler used for welding Duplex 2205 stainless steel and other compatible 22% chromium duplex stainless steel grades. ER329N is commonly associated with the ER2209 AWS classification and is selected for applications requiring a combination of high strength, corrosion resistance and good resistance to localized corrosion.
ER329N filler wire is available in different forms and diameters for TIG/GTAW, MIG/GMAW and other welding applications, depending on the manufacturer’s product range and welding procedure.
The filler metal is particularly suitable for fabrication and repair of duplex stainless steel equipment used in oil and gas, petrochemical, chemical processing, offshore, marine, desalination and process industries.
ER329N Chemical Composition :
| Elements | Min. | Max. |
| C | – | 0.03 |
| Mn | 1.00 | 2.00 |
| Si | 0.25 | 0.65 |
| S | – | 0.020 |
| P | – | 0.030 |
| Cr | 22.50 | 23.50 |
| Ni | 8.00 | 9.50 |
| Cu | – | 0.30 |
| Mo | 3.00 | 3.50 |
| N2 | 0.14 | 0.20 |
ER329N Filler Wire Specification :
| Property | Details |
| Product | ER329N Filler Wire |
| AWS Classification | ER2209 |
| AWS Specification | AWS A5.9 |
| ASME Specification | SFA A5.9 |
| Material | Duplex Stainless Steel |
| Typical Base Metal | Duplex 2205 |
| Common Base Metals | UNS S31803 / S32205 |
| Welding Processes | TIG / GTAW, MIG / GMAW |
| Weld Structure | Duplex Ferritic-Austenitic |
| Main Alloying Elements | Chromium, Nickel, Molybdenum, Nitrogen |
ER329N / ER2209 Filler Wire :
ER329N and ER2209 are closely associated designations in the duplex stainless steel welding market. ER2209 is the standardized AWS classification commonly used for welding Duplex 2205 and related 22% Cr duplex stainless steels.
This makes ER329N / ER2209 filler wire a useful search term for customers who know the product by either designation.
ER329N TIG Filler Rod :
ER329N TIG filler rod is used for GTAW/TIG welding of Duplex 2205 stainless steel components. TIG welding provides good control of heat input and weld deposition, making it suitable for precision fabrication and critical joints.
ER329N TIG rods are available in different diameters according to welding requirements. Common diameters may include:
1.6 mm
2.0 mm
2.4 mm
3.2 mm
4.0 mm
Availability varies by manufacturer and stock.
ER329N MIG Welding Wire
ER329N MIG welding wire, generally classified as ER2209, is used for GMAW/MIG welding of compatible duplex stainless steel grades.
MIG wire provides higher deposition rates than manual TIG welding and is commonly used for fabrication, pipe welding and larger industrial components.
Common wire diameters may include:
0.8 mm
1.0 mm
1.2 mm
1.6 mm
Selection depends on the welding machine, joint design, shielding gas, material thickness and approved welding procedure.
ER329N for Duplex 2205 Welding :
One of the most important applications of ER329N/ER2209 filler wire is welding Duplex 2205 stainless steel.
Duplex 2205 combines ferritic and austenitic phases and provides higher strength than many conventional austenitic stainless steels. ER2209-type filler metals are designed to produce suitable weld-metal characteristics when welding compatible duplex grades.
Applications of ER329N :
• Duplex 2205 pipes
• Duplex stainless steel plates
• Pressure vessels
• Process piping
• Offshore structures
• Chemical processing equipment
• Oil and gas equipment
• Desalination equipment
• Heat exchangers
• Marine equipment
• Advantages of ER329N Filler Wire
ER329N/ER2209 filler wire offers several characteristics required for demanding duplex stainless steel welding applications:
• High weld strength
• Good corrosion resistance
• Good pitting resistance
• Good resistance to chloride-containing environments
• Suitable for Duplex 2205 welding
• Duplex ferritic-austenitic weld structure
• Suitable for TIG and MIG welding
• Good performance in demanding industrial environments
• Available in different diameters and forms
Actual weld performance depends on the welding procedure, heat input, shielding gas, base metal, joint design and post-weld conditions.
ER329N Filler Wire Applications
ER329N filler wire is used across several industries, including:
Oil & Gas – Used for welding duplex stainless steel piping, equipment and components exposed to corrosive service environments.
Petrochemical Industry – Suitable for fabrication and maintenance of process equipment and piping systems.
Chemical Industry – Used for duplex stainless steel components requiring corrosion resistance.
Offshore Industry – Suitable for offshore structures and equipment where chloride and seawater exposure can be important considerations.
Desalination – Used for compatible duplex stainless steel equipment and piping in water-treatment and desalination facilities.
Marine Industry – Used in applications involving seawater and other chloride-containing environments.
