Domestic Market
SUPER OPTIMAL 309L-15 is a high-performance stainless steel welding electrode designed for reliable joining of dissimilar steels. This 309 electrode is widely used for welding mild steel to stainless steel and for applications where crack resistance, strength, and toughness are critical. With excellent weldability and stable arc characteristics, it supports consistent weld quality in fabrication, repair, and industrial maintenance work.
Key Features and Benefits of Superon SUPER OPTIMAL 309L-15
Superon Technik has developed SUPER OPTIMAL 309L-15 to meet demanding welding conditions where standard electrodes often struggle. It is a preferred MS-to-SS welding rod for professionals working with mixed-material joints.
- Excellent Weldability: Smooth arc stability ensures easy handling and consistent weld deposition even in challenging positions.
- Best In Class Mechanical Properties: Offers strong tensile strength and good elongation, resulting in durable and tough weld joints.
- Ideal For Dissimilar Steel Welding: Commonly used as an SS-to-MS welding rod number solution where mild steel is joined to stainless steel.
- Extra Low Carbon Content: Helps reduce the risk of carbide precipitation and improves resistance to cracking.
- Stable Performance At Room Temperature: Delivers reliable impact strength at normal operating conditions.
- Dc + Welding Compatibility: Designed to perform efficiently with DC+ welding current.
- Vacuum-Packed Quality: All electrodes are vacuum-packed to prevent moisture pickup and ensure consistent performance.
These advantages make ss welding rod 309 a dependable choice for structural welding and industrial repairs.
Specifications of SUPER OPTIMAL 309L-15
Here are the key mechanical and welding specifications of SUPER OPTIMAL 309L-15.
| Product Name | AWS SFA Classification | Tensile Strength N mm2 | Elongation A5 Percent | Impact Strength |
| SUPER OPTIMAL 309L-15 | E309L-15 | ≥ 550 | ≥ 30 | 60 J at minus 60⁰C |
Welding Current: DC+Unique Feature: All vacuum-packed for moisture protection
This 309 welding rod is designed to deliver reliable performance across demanding industrial applications.
Properties of SUPER OPTIMAL 309L-15
Superon SUPER OPTIMAL 309L-15 offers a balanced combination of strength, toughness, and weld quality.
| Property | Description |
| Arc Stability | Smooth and stable arc for controlled welding |
| Crack Resistance | Low carbon content helps reduce cracking risks |
| Mechanical Strength | Produces strong and durable weld joints |
| Weld Appearance | Uniform bead profile with good fusion |
| Impact Toughness | Maintains strength at room temperature |
| Moisture Protection | Vacuum packing prevents hydrogen-related defects |
| Application Flexibility | Suitable for fabrication and repair work |
These properties support long-term reliability when using this MS-to-SS welding rod number in critical joints.
Applications of SUPER OPTIMAL 309L-15
SUPER OPTIMAL 309L-15 is widely used in applications where joining different steel types is required.
- Welding mild steel to stainless steel
- Fabrication of mixed metal structures
- Repair of hard-to-weld steels
- Buffer layer welding before hardfacing
- Maintenance of industrial machinery
- Structural fabrication in the power, cement, and construction sectors
Its versatility makes it a preferred SS-to-MS welding rod number for industrial welders.
Related Products
For a complete stainless steel welding solution, the following Superon Technik products are commonly used alongside 309 welding rod options:
- Super Optimal 310
- Super Optimal 316L-15
- Super Optimal 317L
- Super Optimal 318
- Super Optimal 347-15
- Super Optimal 385
- Super Optimal 410-15
- Super Optimal 430-15
- Super Optimal 312
- Super Optimal 316L
These related electrodes help cover a wide range of stainless steel and dissimilar metal welding needs.
