307Si Welding Wire for Dissimilar Steels

Domestic Market

307SiStainless Steel Filler Wire

SUPERMIG 307Si and SUPERTIG 307Si are high-performance austenitic stainless steel filler materials designed for tough welding jobs. This 307Si welding wire is ideal for joining dissimilar steels, including unalloyed steels, austenitic stainless steels and heat-resistant steels. It also works well on hardening and tempering steels such as ballistic and armour plates. The added silicon improves weld pool flow, creating a smooth and clean weld finish.

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Key Features and Benefits

SUPERMIG 307Si and SUPERTIG 307Si are built to handle tough welding conditions with strength, stability and smooth performance. This 307Si welding wire is trusted for critical jobs where reliability matters most.

Strong Dissimilar Metal Joining: Perfect for welding unalloyed steels to austenitic stainless steels and other mixed-metal combinations without compromising joint strength.
Smooth Weld Appearance: The higher silicon content improves weld pool flow, giving a clean, smooth and uniform bead finish.
High Strength and Toughness: Offers excellent tensile strength and impact resistance, making it suitable for heavy-duty and structural applications.
Crack Resistance: Provides strong resistance to weld cracking, especially when working with hardening and tempering steels like ballistic or armour plate.
Versatile Industrial Use: Ideal for surfacing, repair work and fabrication involving heat-resistant and work-hardening steels across multiple industries.

With its strong mechanical performance, smooth finish and ability to handle tough steel combinations, 307Si welding wire stands as a reliable choice for demanding welding applications.

Specifications

Below are the technical details and packing options of 307Si welding wire, covering both SUPERMIG 307Si and SUPERTIG 307Si variants.

Mechanical Properties

Product Name	AWS/SFA	Yield Strength (N/mm²)	Tensile Strength (N/mm²)	Elongation A5 (%)	Impact Energy ISO-V (J) at 20°C	Welding Conditions
SUPERMIG 307Si	ER 307Si	≥ 420	≥ 590	≥ 40%	≥ 100	DC (+)
SUPERTIG 307Si	ER 307Si	≥ 420	≥ 590	≥ 40%	≥ 100	DC (−)

SUPERMIG 307Si – Type of Packing

Packing Type	Details
SD 300 / BS 300	11.34 Kgs (25 Lbs), 15 Kgs (30/33 Lbs) Layer Wound Plastic/Metallic Spool
SD 200	4.54 Kgs (10 Lbs) Layer Wound Plastic Spool
SD 100	0.700 Kgs / 0.910 Kgs / 2 Lbs Layer Wound Plastic Spool
MIG Wire in Drum	100–250 Kgs (200–550 Lbs) Drum Packing

SUPERTIG 307Si – Type of Packing

Packing Type	Details
Tubes	Fibre/Plastic Tubes of 5 Kgs / 10 Lbs
Bulk Supply	Also Available in Bulk Packing

These specifications and flexible packing options make 307Si welding wire suitable for both small-scale workshops and large industrial fabrication projects.

Properties

The 307Si welding wire is designed to deliver strength, flexibility and consistent welding performance in demanding conditions. Its balanced chemical composition supports both structural strength and smooth weld quality.

High Mechanical Strength: Provides strong yield and tensile strength, ensuring the weld joint can handle heavy loads and stress without failure.
Excellent Impact Toughness: Maintains high impact energy at room temperature, helping the weld resist sudden shocks and pressure.
Smooth Weld Pool Fluidity: The added silicon improves weld pool flow, resulting in a cleaner, smoother and more uniform weld bead.
Versatile Metallurgical Compatibility: Works efficiently with dissimilar steels, including austenitic manganese steels and carbon steels, making it suitable for complex fabrication jobs.

With its dependable strength and smooth weld performance, 307Si welding wire remains a practical and reliable choice for heavy-duty industrial applications.