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AWS A5.9 ER309
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 stainless steel filler metal, primarily known for its high alloy content.
2）Composition: The "ER309" classification indicates a nominal chemical composition of 23-25% chromium and 12-14% nickel, making it more highly alloyed than the ER308 series.
3）Application: Its most common and significant use is for welding dissimilar metals, such as joining stainless steel to carbon steel or low-alloy steel.
4）Versatility: It is also used for welding similar high-alloy stainless steels and as a "buttering" or buffer layer on carbon steel before applying a final stainless steel overlay.
5）Welding Processes: It is a versatile consumable compatible with various welding methods, including Gas Metal Arc Welding (GMAW/MIG), Gas Tungsten Arc Welding (GTAW/TIG), and submerged arc welding.
6）Properties: The weld metal offers excellent resistance to heat and corrosion, and its high alloy content helps to tolerate dilution from the base metals, which is critical in dissimilar metal welding.
AWS A5.9 ER309 Stainless Steel Welding Wire.pdf
Standard： AWS A 5.9 YB/T5092 | Chemical Composition % | |||||||||||||
C | Mn | Si | Cr | Ni | P | S | Mo | Cu | ||||||
Grade ER309 | ≤0.12 | 1.0 – 2.5 | 0.3 – 0.65 | 23 – 25 | 12 – 14 | ≤0.03 | ≤0.03 | ≤0.75 | ≤0.75 | |||||
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 | ||||||||||||
Mechanical Properties | Tensile Strength Mpa | Elongation after fracture A（%） | ||||||||||||
≥ 530 | ≥ 30 | |||||||||||||
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 ER309 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 ER309 is a highly-alloyed stainless steel welding wire.
It's primarily known for its high content of chromium (23-25%) and nickel (12-14%), which provides exceptional tolerance for dilution from base metals.
Its most common and important application is for welding dissimilar metals.
This includes joining stainless steel to carbon steel or low-alloy steels, a task where its high alloy content is crucial for preventing cracking.
ER309 is also used for welding similar grades of high-alloy stainless steels.
Furthermore, it's frequently used as a "buttering" or buffer layer on carbon steel before a final stainless steel overlay is applied, a technique known as cladding.
Dissimilar metal welding is the process of joining two different types of metal.
When welding stainless steel to carbon steel, the ER309 filler metal's high alloy content dilutes into the carbon steel side, creating a stable, crack-resistant weld.
ER309 is a versatile filler metal compatible with multiple welding processes.
It is widely used for Gas Metal Arc Welding (GMAW/MIG), Gas Tungsten Arc Welding (GTAW/TIG), and submerged arc welding.
Besides joining stainless to carbon steel, it's also a good choice for welding Type 309 stainless steels.
It can be used for welding other stainless steels that require a higher alloy content to handle specific service conditions.
Yes, the high chromium and nickel content provides excellent resistance to corrosion and oxidation.
This makes the weld joint durable and suitable for applications in corrosive environments.
The key difference is the carbon content.
ER309L is a low-carbon version of ER309, with a maximum of 0.03% carbon, which provides even greater resistance to intergranular corrosion.
You should choose ER309L when the welded part will be exposed to high temperatures for extended periods, which could lead to carbide precipitation.
The lower carbon content of ER309L minimizes this risk, making it a safer choice for critical applications.
The weld deposit from ER309 has a tensile strength typically around 85,000 psi (586 MPa).
It offers good ductility and toughness, which are crucial for reliable joints in demanding applications.
Cladding is the process of applying a layer of corrosion-resistant material to a cheaper or stronger base material.
ER309 is often used as the first "buttering" layer on carbon steel to prevent the high-alloy top layer from diluting and cracking.
For Gas Metal Arc Welding (MIG), a gas mixture of 98% argon and 2% carbon dioxide is a popular choice.
This combination offers a stable arc and a good weld bead appearance.
Preheating is generally not required for joining standard stainless steels with ER309.
However, when welding to carbon steel, a mild preheat might be beneficial to manage heat input and reduce the risk of cracking.
The high percentage of chromium and nickel in ER309 allows it to absorb a certain amount of iron from the carbon steel base metal without the weld's properties degrading.
This creates a robust and ductile joint that can withstand stress and temperature changes.
ER309 is frequently used to join stainless steel flanges to carbon steel pipes.
It's also essential for fabricating repair components and transition joints in power plants, refineries, and other heavy industries.
To maintain its integrity and prevent contamination, the wire should be stored in a clean, dry environment.
It's best to keep spools in their original, sealed packaging until they are needed.
Yes, the high alloy content of ER309 provides excellent resistance to oxidation and scaling at elevated temperatures.
This makes it a reliable choice for applications that involve sustained heat.
ER309LSi is a low-carbon, high-silicon version of ER309.
The higher silicon content provides better arc stability and weld puddle fluidity, making it ideal for MIG welding applications that require a smoother, more cosmetic bead.
Amperage settings vary based on wire diameter, welding process, and base metal thickness.
Always consult the manufacturer's data sheet for specific recommendations to ensure optimal performance and weld quality.
Choose ER309 when you need to weld dissimilar metals or high-alloy stainless steels.
Use ER308 for welding standard 300 series stainless steels to each other, as its lower alloy content is sufficient and more cost-effective for these applications.
