309LSi TIG Rod for Stainless Steel Welding

Domestic Market

309Si / 309LSiStainless Steel Filler Wire

309L / 309LSi welding consumables are designed for reliable joining of stainless steel to mild and medium-tensile steels. These products are widely used for dissimilar metal welding, where strong, crack-resistant welds are essential. The added silicon content improves weld pool fluidity, bead appearance, and overall weld quality. This makes 309LSi welding wire and 309LSi TIG rod suitable for fabrication, repair, and buffer layer applications across multiple industries.

Key Features and Benefits of Superon 309L / 309LSi

309L and 309LSi consumables are engineered to deliver stable performance and consistent weld quality in demanding conditions.

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Key features and benefits include:

Excellent for Dissimilar Metal Welding 309L / 309LSi consumables are specifically formulated for joining stainless steel to carbon steel, mild steel, and medium tensile steels. Their tailored chemistry ensures strong metallurgical bonding, reducing the risk of weld defects and ensuring long-lasting, reliable joints even when welding dissimilar metals in industrial and fabrication settings.
Improved Weld Fluidity The added silicon content enhances the weld pool flow, allowing molten metal to move smoothly and fill joints effectively. This results in uniform weld beads with better fusion, minimising the risk of voids or undercutting, and improving overall weld quality and surface finish.
Strong and Crack-Resistant Welds 309LSi weld metal is designed to resist cracking during both welding and cooling, providing durable and mechanically sound joints. Its high resistance to thermal and stress-induced cracking makes it ideal for applications where structural integrity and long-term reliability are critical.
Suitable for Buffer Layers and Buttering These consumables are commonly used as an intermediate layer (buffer or buttering layer) before depositing 308-grade stainless steel. This ensures smooth transition and excellent adhesion between base and overlay materials, reducing the risk of interfacial cracking and enhancing overall weld performance.
Reliable Performance at Moderate Temperatures 309LSi is suitable for clad steel welding where service temperatures remain below 300°C. The consumables maintain stable mechanical and metallurgical properties under moderate thermal conditions, ensuring consistent weld quality across various industrial environments.
Clean Weld Appearance The welding consumables produce smooth, uniform weld beads with minimal spatter, reducing post-weld cleaning and finishing efforts. This contributes to better aesthetics, easier inspection, and faster turnaround in both production and maintenance welding tasks.

Specifications of 309L / 309LSi

The table below provides key mechanical properties and welding conditions to ensure dependable performance in various fabrication tasks.

Product Name	AWS/SFA	Yield Strength N/mm2	Tensile Strength N/mm2	Elongation A5(%)	Impact Energy ISO-V(J) 20° C	Welding Conditions
SUPERMIG 309LSi	ER 309LSi	≥ 350	≥ 520	≥ 30%	≥ 100	DC (+)
SUPERTIG 309LSi	ER 309LSi	≥ 350	≥ 520	≥ 30%	≥ 100	DC (-)

SUPERMIG 309LSi - TYPE OF PACKING :

SD 300 / BS 300	11.34 Kgs/ 25 Lbs, 15 Kgs/ 30 Lbs/ 33lbs Layer Wound Plastic/ Metallic Spool.
SD 200	4.54 Kgs/ 10 Lbs Layer Wound Plastic Spool.
SD 100	0.700 Kgs/0.910 /2 lbs Layer Wound Plastic Spool.
Mig Wire in Drum	In Drums of 100-250 Kgs (200-550 Lbs)

Properties of 309L / 309LSi

These properties highlight the performance characteristics of 309LSi welding consumables, ensuring consistent weld quality and reliability for both MIG and TIG applications.

Property	Description
Weld Metal Strength	Provides strong and durable weld joints
Crack Resistance	Designed to minimise cracking during and after welding
Weld Pool Control	Improved fluidity for smooth bead formation
Corrosion Resistance	Suitable for stainless steel service environments
Bead Appearance	Clean and uniform weld finish
Versatility	Effective for MIG and TIG welding applications