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AWS A5.9 ER2209
1kg,5kg,15kg,20kg
1lb;2lb;4.5lb;11lb;15lb;20lb;33lb;44lb
0.6mm;0.8mm;0.9mm;1.0mm;1.2mm;1.6;2.0mm
0.023;0.030in;0.035in;3/64″;0.045;1/16″;5/64″
1.6mm,2.0mm,2.4mm,3.2mm,4.0mm,5.0mm
1/16 ″in;5/64″in;3/32″in;1/8″in;5/32″inch
D100,D200,D270,D300,BS300,K300
Acceptable (design the pack with your logo)
15 Days
Product Description
1）Classification: This is an American Welding Society (AWS) standard for a bare duplex stainless steel filler metal.
2）Composition: The "ER2209" classification indicates a balanced chemical composition, primarily consisting of 22-23% chromium, 8-10% nickel, and 3-4% molybdenum, along with nitrogen.
3）Microstructure: Its key feature is a dual-phase microstructure containing roughly equal parts of austenite and ferrite in the as-welded condition.
4）Application: It is specifically designed for welding similar duplex stainless steels, such as UNS S31803 (2205), where a balanced microstructure is essential for high performance.
5）Properties: This unique microstructure gives the weld metal a high tensile strength and superior resistance to various forms of corrosion, including pitting, crevice corrosion, and especially stress corrosion cracking.
6）Usage: It is widely used in industries like oil and gas, chemical processing, and desalination plants for components that require a combination of high strength and excellent corrosion resistance.
AWS A5.9 ER2209 Stainless Steel Welding Wire.pdf
Standard： AWS A 5.9 YB/T5092 | Chemical Composition % | ||||||||||||||
C | Mn | Si | Cr | Ni | P | S | Mo | N | |||||||
Grade ER2209 | ≤0.03 | 0.5 – 2.0 | ≤ 0.90 | 21.5 – 23.5 | 7.5 – 9.5 | ≤0.03 | ≤0.03 | ≤0.75 | 0.08 – 0.2 | ||||||
Type | Spool (MIG) | Tube (TIG) | |||||||||||||
Specification ( MM ) | 0.8、0.9、1.0、1.2、1.6、2.0 | 1.6、2.0、2.4、3.2、4.0、5.0 | |||||||||||||
Package | S100/1kg S200/5kg S270,S300/15kg-20kg | 5kg/box 10kg/box length :1000MM | |||||||||||||
Diameter（MM） | 0.8 | 1.0 | 1.2 | 1.6 | 2.0 | 2.5 | 3.2 | ||||||||
Current （A） | 70 ~ 150 | 100 ~ 200 | 140 ~ 220 | 50 ~ 100 | 100 ~ 200 | 200 ~ 300 | 300 ~ 400 | ||||||||
AWS A5.9 ER2209 Stainless Steel Welding Wire Parameters
| Diameter | Process | ||
| in | mm | ||
| 0.03 | 0.8 | GMAW | |
| 0.035 | 0.9 | GMAW | |
| 0.039 | 1.0 | GMAW | |
| 1/25.4” | |||
| 0.045 | 1.2 | GMAW | |
| 3/64” | |||
| 1/16” | 1.6 | GMAW | |
| 3/32” | 2.4 | GMAW | |
| Diameter | Process | ||
| in | mm | ||
| 1/16” | 1.6 | GTAW | |
| 3/32” | 2.4 | GTAW | |
| 1/8” | 3.2 | GTAW | |
| 5/32” | 4.0 | GTAW | |
| 3/16” | 4.8 | GTAW | |
| Weight | 0.5kg | 1kg | 2kg | 5kg | 15kg | 20kg | |||||
| 1 lb | 2 lb | 4 lb | 11 lb | 33 lb | 44 lb | ||||||
AWS A5.9 ER2209 is a duplex stainless steel filler metal.
It is specifically engineered to have a balanced dual-phase microstructure, combining the benefits of both austenitic and ferritic stainless steels.
"Duplex" refers to the weld metal's microstructure, which is a mix of approximately equal parts of **austenite** and **ferrite**.
This dual-phase structure gives it a unique combination of high strength and exceptional corrosion resistance.
The balanced microstructure provides a significant increase in tensile strength, almost double that of standard austenitic grades like ER308.
It also offers superior resistance to various forms of corrosion, particularly **stress corrosion cracking (SCC)** and pitting.
It is the standard choice for welding **duplex stainless steels** such as UNS S31803 and UNS S32205, which are commonly known as "2205 duplex."
It can also be used for joining these duplex grades to other stainless steel or carbon steel.
Stress corrosion cracking is a form of cracking that occurs in a corrosive environment under tensile stress.
The ferrite phase in the ER2209 weld metal is highly resistant to this type of attack, making it an excellent choice for applications in chloride-rich environments.
ER2209 has a nominal composition of **22-23% chromium**, **8-10% nickel**, and **3-4% molybdenum**.
The inclusion of **nitrogen** is also crucial, as it helps to stabilize the austenite phase and contributes to the alloy's strength and corrosion resistance.
ER2209 is a versatile filler metal that is suitable for multiple welding methods.
It is commonly used for **Gas Metal Arc Welding (GMAW/MIG)** and **Gas Tungsten Arc Welding (GTAW/TIG)**.
Generally, preheating is not recommended when welding with ER2209, as it can disrupt the balanced microstructure and lead to the formation of undesirable intermetallic phases.
It's best to maintain a low interpass temperature to ensure a proper ferrite-austenite balance.
ER2209 is a staple in the **oil and gas industry** for offshore platforms and pipelines.
It's also widely used in **chemical processing plants**, **desalination equipment**, and in the pulp and paper industry.
The high content of **chromium, molybdenum, and nitrogen** gives ER2209 an excellent Pitting Resistance Equivalent Number (PREN).
This high PREN value makes the weld joint highly resistant to pitting and crevice corrosion, even in aggressive environments.
The tensile strength of an ER2209 weld deposit is typically around **100,000 psi (690 MPa)** or higher.
This is significantly higher than that of standard austenitic grades, providing a much stronger joint.
Post-weld heat treatment is generally not required and, in most cases, is discouraged.
Properly executed welding procedures with controlled interpass temperatures are sufficient to achieve the desired microstructure.
For Gas Metal Arc Welding (MIG), a shielding gas mixture of **98% argon and 2% carbon dioxide** is often recommended.
This combination provides a stable arc and helps to maintain the proper alloy balance.
To prevent contamination and moisture absorption, the wire must be stored in a **clean, dry, and sealed environment**.
It is crucial to keep spools in their original packaging to avoid weld defects like porosity.
Desalination involves handling highly corrosive saltwater and chlorides.
ER2209's superior resistance to pitting and stress corrosion cracking makes it an excellent choice for constructing durable and long-lasting components in this environment.
While its primary use is for duplex stainless steels, ER2209 can sometimes be used to weld stainless steel to carbon steel or to other stainless grades where its high strength and corrosion resistance are needed.
However, careful consideration of the application is required.
The main differences are in microstructure and mechanical properties.
ER2209 is a duplex alloy with a ferrite-austenite structure and much higher strength, while ER316L is a lower-strength austenitic alloy with good corrosion resistance.
Nitrogen is a key alloying element in duplex stainless steels.
It helps to stabilize the austenite phase, increases the alloy's strength, and enhances its resistance to pitting and crevice corrosion.
Improper welding procedures, such as high heat input, can lead to an imbalanced microstructure.
This can result in an excess of either ferrite or austenite, which would compromise the weld's mechanical properties and corrosion resistance.
Choose **ER2209** for standard duplex stainless steel applications where you need a balance of strength and corrosion resistance.
Choose **ER2553** (Super Duplex) for even more demanding applications that require a higher level of corrosion resistance, particularly against chlorides, due to its increased alloy content.
