Domestic Market
ER321 Filler Wire is a stainless steel MIG welding wire developed for welding stabilised stainless steel grades such as 304, 308, 321, and 347. It is designed to deliver high weld quality, strong mechanical properties, and excellent resistance to intergranular corrosion. This SS 321 Welding Filler is widely used in industries where reliability, corrosion resistance, and long service life are essential.
Key Features and Benefits of Superon ER 321 Filler Wire
Superon has engineered ER321 Filler Wire to meet the requirements of industrial stainless steel welding applications where performance consistency is critical.
Key features and benefits include:
- Titanium stabilised weld metal The titanium stabilisation helps prevent carbide precipitation, improving resistance to intergranular corrosion after welding.
- High weld quality Produces smooth weld beads with good fusion and minimal defects, supporting consistent joint strength.
- Excellent corrosion resistance Suitable for applications exposed to corrosive environments, including chemical processing and food-related industries.
- Strong mechanical properties Delivers good yield strength, tensile strength, and elongation for durable and long-lasting weld joints.
- Stable arc performance Precision layer wound wire ensures smooth wire feeding and stable arc behaviour during welding.
- Shielding gas flexibility Designed for use with mixed shielding gases such as argon with oxygen or argon with carbon dioxide, allowing process flexibility.
- Wide industrial acceptance Commonly used in engineering applications where stainless steel structures require dependable weld performance.
These advantages make SS 321 welding filler suitable for demanding fabrication and production environments.
Specifications of ER 321 Filler Wire
The table below outlines the key mechanical properties and welding conditions for ER321 Filler Wire.
| Product Name | AWS SFA Classification | Yield Strength N/mm2 | Tensile Strength N/mm2 | Elongation A5 Percent | Impact Energy ISO V J at 20 C | Welding Conditions |
|---|---|---|---|---|---|---|
| SUPERMIG 321 | AWS A5.9 ER 321 | ≥ 400 | ≥ 550 | ≥ 30 | ≥ 65 | DC positive |
These specifications ensure reliable performance across a wide range of stainless steel welding applications.
Properties of ER321 Filler Wire
ER321 Filler Wire is designed to provide stable welding performance and long-term joint reliability.
| Property | Description |
|---|---|
| Intergranular Corrosion Resistance | Titanium stabilisation reduces carbide formation |
| Mechanical Strength | Strong and ductile weld metal |
| Arc Stability | Smooth and controlled arc during welding |
| Weld Appearance | Uniform bead profile with good surface finish |
| Feeding Performance | Precision layer wound wire ensures consistent feeding |
| Thermal Stability | Maintains weld integrity under service temperatures |
| Process Compatibility | Suitable for MIG welding of stabilised stainless steels |
These properties support consistent results in both fabrication and repair work.
Applications of ER321 Filler Wire
SS 321 Welding Filler is commonly used in industries where stainless steel components are exposed to heat and corrosive environments.
Typical applications include:
- Petrochemical equipment fabrication
- Food processing machinery
- Energy and power sector components
- Heat exchangers and pressure vessels
- Stainless steel piping and plate welding
- General engineering and industrial fabrication
Its resistance to intergranular corrosion makes it suitable for welded structures operating at elevated temperatures.
Related Products
For comprehensive stainless steel welding solutions, the following Superon products are commonly used alongside ER321 Filler Wire:
- Stainless Steel Stick Electrodes (ER-2594, ER-304L, ER-307, ER-307Si)
- Stainless Steel TIG Filler Rods – Provide precision and smooth weld finishes for critical applications.
- Duplex Stainless Steel Filler Wires – Ideal for applications requiring superior strength and corrosion resistance.
- Welding Auxiliaries and Industrial Sprays – Support consistent weld quality and surface protection.
- Abrasives for Weld Cleaning and Finishing – Ensure clean, professional results with minimal post-weld preparation.
These related products enhance efficiency, ensure high-quality welding results, and offer a complete solution for stainless steel fabrication needs.
