ER309 Stainless Steel MIG Welding Wire
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Maple Industrial Products Inc.
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Overview
ER309 Stainless Steel MIG Welding Wire
ER309 Stainless Steel MIG Welding Wire is engineered for welding dissimilar steels, such as mild steel to stainless steel, as well as for joining 309 stainless steel bases. Its composition, which includes higher chromium and nickel elements, offers excellent tolerance against heat and corrosion, making it an ideal choice for welding in environments subjected to high temperatures. ER309 wire is particularly beneficial in applications like furnace parts, boiler backings, and exhaust systems, where metals of different compositions are joined.
Key Features
- Engineered for welding dissimilar steels — joins mild steel to stainless steel with superior results
- Higher chromium and nickel composition provides excellent tolerance against heat and corrosion
- Ideal for high-temperature environments including furnace parts, boiler backings, and exhaust systems
- Produces a consistently smooth and stable arc with minimal spatter
- Clean finish ensuring strong and durable welds in both similar and dissimilar metal joining tasks
- Available in three spool sizes — 2 lbs, 10 lbs, and 33 lbs — from PowerWeld and CWI
Technical Specifications
| AWS Classification | ER309 |
| Process | MIG (GMAW) |
| Compatible Base Metals | Mild steel to stainless steel; 309 stainless steel; dissimilar metal combinations |
| Key Alloying Elements | Higher chromium and nickel content |
| Heat Resistance | Excellent — suitable for high-temperature environments |
| Arc Characteristics | Smooth, stable arc, minimal spatter |
| Available Diameters | .030 inch (0.8mm), .035 inch (0.9mm), .045 inch (1.2mm) |
| Available Spool Sizes | 2 lbs, 10 lbs, 33 lbs |
| Industry Applications | Furnace parts, boiler backings, exhaust systems, dissimilar metal fabrication |
Part Number & Size Reference
Other Products
309 Stainless Steel Stick Electrodes | 309 Stainless Steel TIG Rods | 308 Stainless Steel MIG Welding Wire | 316 Stainless Steel MIG Welding Wire | Stainless Steel Flux Cored Welding Wire
Specifications
| Product type | Stainless Steel Welding |
|---|---|
| Size | .030 inch (0.8mm) 10lbs., .035 inch (0.9mm) 33lbs., .030 inch (0.8mm) 2lbs., .035 inch (0.9mm) 2lbs., .035 inch (0.9mm) 10lbs., .045 inch (1.2mm) 10lbs., .045 inch (1.2mm) 33lbs. |
| Brand | CWI, PowerWeld |
Sizes & pricing
Every option with its part number and price. Select one to load it into the cart above.
| Option | SKU | Price | Select |
|---|---|---|---|
| .030 inch (0.8mm) 10lbs. / CWI | MW309L03510 | $209.00 | |
| .035 inch (0.9mm) 33lbs. / CWI | MW309L03533 | $479.00 | |
| .030 inch (0.8mm) 2lbs. / PowerWeld | MW309L03002 | $55.00 | |
| .035 inch (0.9mm) 2lbs. / PowerWeld | MW309L03502 | $52.00 | |
| .035 inch (0.9mm) 10lbs. / PowerWeld | MW309L03510 | $209.00 | |
| .045 inch (1.2mm) 10lbs. / PowerWeld | MW309L04510 | $199.00 | |
| .045 inch (1.2mm) 33lbs. / PowerWeld | MW309L04533 | $459.00 |
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