STAVINOX 347Si / 347LSi

Key Features and Benefits

347Si/347LSi is made to give dependable welding performance in stainless steel applications that operate in corrosive environments.

• Niobium Stabilised Weld Metal: The deposit is a 19 chromium, 9 nickel weld metal stabilised with niobium, which resists intergranular corrosion.
• Smooth Weld Bead Appearance: Silicon helps give a smooth bead profile and good wetting as you weld.
• High Resistance To Corrosive Media: Performs well at service temperatures where corrosion resistance matters.
• Stable Arc Performance: The arc stays steady when the recommended shielding gases are used.
• Wide Application Range: Fits the fabrication of pipes, plates and pressure vessels.
• Consistent Mechanical Properties: Welded joints keep their strength, ductility and impact resistance.

With these features, 347Si works for shop fabrication as well as site welding.

Specifications

The table below sets out the main mechanical properties and welding conditions of 347Si / 347LSi.

Properties

Stanvac International 347Si / 347LSi welding consumables deliver durable, corrosion-resistant, high-quality welds on stainless steel components exposed to heat and harsh conditions.

• Austenitic Stainless Steel Weld Metal: Fits components exposed to corrosive environments and elevated temperatures.
• Niobium-Stabilised: Stops chromium carbide precipitation, which lowers the risk of intergranular corrosion in welded joints.
• Low Carbon Content (347LSi): Improves corrosion resistance, particularly in welded and heat-exposed sections.
• Excellent Mechanical Strength: Keeps tensile strength, toughness and ductility for components under stress or thermal expansion.
• Smooth Weld Beads: Silicon improves weld pool fluidity, giving uniform, clean, attractive welds.
• Stable Arc Performance: Reliable welding with minimal spatter, for both MIG and TIG processes.
• High-Temperature Resistance: Well suited to chemical, power generation and marine applications where elevated service temperatures are common.

Taken together, these properties make 347Si / 347LSi a dependable option for fabricating, repairing and maintaining high-performance stainless steel components.

Related Products

We supply complementary welding consumables for varied stainless steel fabrication and repair needs, giving dependable performance across industrial applications.

• 347 and 347H Stainless Steel MIG Wires: Suited to high-temperature service and corrosive environments, with excellent resistance to intergranular corrosion and lasting durability.
• 321 Stainless Steel Welding Wires: For applications needing stabilisation against chromium carbide precipitation, and suitable for heat-resistant and high-temperature service components.
• 316 and 316L Stainless Steel Welding Consumables: Superior corrosion resistance in chemical, marine and industrial environments, which makes them fit for demanding applications.
• 309 Series Stainless Steel Welding Wires: For joining dissimilar metals and for buffer layers, giving strong, crack-resistant welds in mixed steel assemblies.

Alongside 347Si / 347LSi consumables, these related products form a complete solution for stainless steel welding, surfacing and maintenance across a range of industrial and fabrication applications.