ER2209 Duplex Stainless Steel TIG Filler Rod
Short Description:
ER2209 Duplex Stainless Steel TIG Filler Rod is designed for welding 2205 duplex stainless steels such as UNS S31803 and S32205. It offers high strength and good resistance to pitting and stress corrosion cracking for offshore, chemical, oil & gas and process equipment.
ER2209 Duplex Stainless Steel TIG Filler Rod
ER2209 is a bare duplex stainless steel TIG filler rod developed for welding 22Cr duplex stainless steels, especially 2205 grades such as UNS S31803 and UNS S32205.
For buyers, the most important question is not only the ER2209 classification itself, but whether the filler metal matches the base material, welding process and corrosion environment. ER2209 is commonly selected for duplex stainless steel piping, vessels, heat exchangers and process equipment that require high weld strength together with resistance to pitting and stress corrosion cracking.
Welding Process: GTAW / TIG
Filler Classification: AWS A5.9 ER2209
Main Service: Duplex stainless steel fabrication in corrosive environments
Request ER2209 Price & Availability
What Can ER2209 TIG Filler Rod Weld?
ER2209 is primarily used for welding duplex stainless steels in the 22Cr class. The base material and approved welding procedure should always be confirmed before production welding.
| Base Material | Common Designation | ER2209 Use |
|---|---|---|
| UNS S31803 | 2205 Duplex Stainless Steel | Common matching filler for GTAW welding |
| UNS S32205 | 2205 Duplex Stainless Steel | Common matching filler for piping and equipment fabrication |
| 22Cr Duplex Grades | Equivalent approved duplex grades | Subject to WPS and project specification |
| Dissimilar Joints | Duplex to selected lower-alloy steels | Possible when supported by approved welding procedure |
Why ER2209 Is Used for 2205 Duplex Stainless Steel
ER2209 is not simply a straight rod made from 2205 base metal. The filler composition is adjusted for welding performance, particularly to help produce a suitable austenite-ferrite balance in the weld metal.
| 2205 Base-Metal Match
Designed for 22Cr duplex stainless steel welding, including common 2205 grades. |
Duplex Weld Structure
Higher nickel content than the base metal helps promote a suitable weld-metal phase balance. |
High Weld Strength
Suitable for structural and pressure-related duplex stainless steel fabrication. |
| Pitting Resistance
Chromium, molybdenum and nitrogen support corrosion resistance in aggressive environments. |
Stress Corrosion Resistance
Well suited to duplex applications where chloride-related stress corrosion is a concern. |
Pipe Root & Fill Welding
Straight TIG rod is suitable for controlled root and fill welding in duplex pipe fabrication. |
ER2209 TIG Filler Rod Supply Specifications
The following parameters are the main items buyers should confirm when sourcing ER2209 straight TIG filler rods.
| Specification | Supply Information |
|---|---|
| AWS Classification | ER2209 |
| UNS | S39209 |
| Standard | AWS A5.9 / ASME SFA-5.9 |
| EN ISO Classification | EN ISO 14343-A: W 22 9 3 N L |
| Product Form | Straight TIG filler rod / cut length |
| Common Diameter | 1.6 / 2.0 / 2.4 / 3.2 mm; other sizes subject to confirmation |
| Common Length | 1000 mm; other cut lengths subject to confirmation |
| Welding Process | GTAW / TIG |
| Shielding Gas | 100% Argon commonly used for GTAW |
| Surface | Clean bare metallic surface |
| Marking | Grade / batch marking according to agreed supply requirement |
| Packaging | PE tube / protective tube / carton / export packing |
TIG Filler Rod vs MIG Wire vs Welding Electrode
These welding consumables may use similar alloy classifications but their product form and welding processes are different.
| Product Form | Typical Appearance | Process | ER2209 Page Relevance |
|---|---|---|---|
| TIG Filler Rod | Straight bare metal rods | GTAW / TIG | This product |
| MIG Wire | Continuous wire on spool | GMAW / MIG | Separate product form |
| Welding Electrode | Flux-coated stick electrode | SMAW / MMA | Different product classification |
ER2209 Chemical Composition
ER2209 contains chromium, nickel, molybdenum and nitrogen to support duplex weld-metal strength and corrosion resistance. The following values are AWS classification limits; actual batch chemistry should be confirmed by the supplied certificate.
| Element | C | Mn | Si | Cr | Ni | Mo | N | P | S |
|---|---|---|---|---|---|---|---|---|---|
| ER2209 | ≤0.03 | 0.50–2.00 | ≤0.90 | 21.5–23.5 | 7.5–9.5 | 2.5–3.5 | 0.08–0.20 | ≤0.03 | ≤0.03 |
Typical ER2209 Weld Metal Performance
Actual weld-metal properties depend on welding procedure, heat input, shielding gas, joint design and test condition. The following figures are typical published results rather than guaranteed batch values.
| Property | Typical Published Result |
|---|---|
| Yield Strength | Around 600 MPa |
| Tensile Strength | Around 800 MPa |
| Elongation | Around 28% |
| Impact Toughness | Depends on procedure and test temperature |
Typical performance values are for product-selection reference only. Final acceptance criteria should follow the applicable project specification, WPS and supplied test documentation.
ER2209 TIG Welding Considerations
Duplex stainless steel welding requires control of heat input, cleanliness and shielding to maintain weld quality and suitable phase balance.
Where ER2209 TIG Filler Rod Is Used
| Duplex Piping
Root and fill welding for 2205 process pipe |
Heat Exchangers
Duplex tube and process-system fabrication |
Pressure Equipment
Duplex vessels and fabricated assemblies |
| Oil & Gas
Corrosion-resistant process and pipeline systems |
Chemical Processing
Equipment exposed to aggressive process media |
Marine & Offshore
Chloride-containing and seawater-related service |
ER2209 Filler Rod Inspection & Traceability
For welding consumables, grade identification and batch traceability are particularly important because filler classification directly affects weld performance.
| Inspection Item | What Is Checked |
|---|---|
| Grade Identification | ER2209 classification and rod marking |
| Batch / Lot Traceability | Batch identification matched with supplied documentation |
| Chemical Composition | Checked against applicable ER2209 classification requirements |
| Diameter | Finished filler-rod diameter |
| Cut Length | Finished rod length |
| Surface Condition | Clean bare surface without visible oil, moisture or foreign contamination |
ER2209 TIG Filler Rod Packaging
Straight TIG rods should be protected from moisture, contamination and bending during storage and transportation.
FAQ
Is ER2209 the same material as 2205 duplex stainless steel?
No. 2205 is a base-metal grade, while ER2209 is a welding filler classification designed for joining 22Cr duplex stainless steels such as 2205.
Why does ER2209 contain more nickel than 2205 base metal?
The higher nickel level helps promote sufficient austenite formation in the weld metal and supports a suitable duplex phase balance after welding.
Can ER2209 TIG rods be used for 2205 pipe welding?
Yes. ER2209 TIG filler rods are commonly used for root and fill welding of 2205 duplex piping when permitted by the approved welding procedure.
What shielding gas is commonly used?
100% argon is commonly used for GTAW/TIG welding with ER2209 filler rods. Final shielding and purge requirements should follow the WPS.
Can batch certificates be supplied?
Material certificates and batch traceability documentation can be supplied according to confirmed order requirements.
Need ER2209 TIG Filler Rod for 2205 Duplex Stainless Steel?
Send the base-metal grade, required rod diameter, length, quantity and applicable welding specification. SAKY STEEL can review the requirement and provide ER2209 filler-rod availability and quotation.
