About ER 316LSi Sub Arc Wire

ER 316LSi is a stainless steel sub arc welding wire primarily composed of 18% chromium, 12% nickel, and 2-3% molybdenum. The “Si” indicates its silicon content, enhancing weld pool fluidity and minimizing spatter. With low carbon content, it’s ideal for welding austenitic stainless steels like 304 and 316, offering excellent corrosion resistance.

ER 316LSi Sub Arc Wire Chemical Compositions:

The chemical composition of ER 316LSi sub arc wire typically includes:

  • Chromium (Cr): Around 18%
  • Nickel (Ni): Approximately 12%
  • Molybdenum (Mo): 2-3%
  • Silicon (Si): Typically 0.65-1%
  • Carbon (C): Usually less than 0.03%
  • Manganese (Mn): About 1.0-2.5%
  • Phosphorus (P) and sulfur (S): Both typically less than 0.03% each.

ER 316LSi Sub Arc Wire Physical Properties:

ER 316LSi sub arc wire exhibits several physical properties essential for welding applications:

  1. Tensile Strength: Typically ranging from 550 to 690 MPa, ensuring the welds can withstand considerable mechanical stress.
  2. Yield Strength: Generally around 310 to 380 MPa, indicating the point at which the material begins to deform permanently under load.
  3. Elongation: Typically 35% or higher, indicating the wire’s ability to stretch before fracturing, contributing to the weld’s ductility.
  4. Density: Approximately 8 g/cm³, providing insight into the wire’s mass per unit volume.
  5. Melting Point: Around 1400 to 1450°C, ensuring the wire melts uniformly during welding, facilitating a strong metallurgical bond.
  6. Coefficient of Thermal Expansion (CTE): Similar to other austenitic stainless steels, typically around 16 to 17 µm/m°C, minimizing distortion and residual stresses in the welded material.
  7. Electrical Conductivity: High electrical conductivity ensures efficient energy transfer during the welding process, contributing to stable arc characteristics.
  8. Magnetic Permeability: ER 316LSi wires typically exhibit low magnetic permeability, making them suitable for applications where magnetic properties are undesirable.

These physical properties collectively make ER 316LSi sub arc wire a reliable choice for welding austenitic stainless steels in various industries, including chemical processing, food processing, and marine applications.

ER 316LSi Sub Arc Wire mechanical Properties:

ER 316LSi sub arc wire offers robust mechanical properties crucial for welding operations:

  1. Tensile Strength: Typically ranging from 550 to 690 MPa, indicating the maximum stress the wire can withstand before breaking.
  2. Yield Strength: Generally around 310 to 380 MPa, representing the stress at which the wire begins to deform plastically.
  3. Elongation: Typically 35% or higher, showing the percentage of deformation the wire can undergo before fracture, indicating its ductility.
  4. Impact Toughness: Typically exhibits good impact resistance, ensuring the welds can withstand sudden loads or shocks without fracturing.
  5. Hardness: Typically in the range of 170 to 220 HV (Vickers hardness), indicating the wire’s resistance to indentation or penetration.
  6. Fatigue Strength: Offers adequate fatigue resistance, allowing the welded components to endure repeated loading cycles without failure.
  7. Creep Resistance: Maintains structural integrity under prolonged exposure to high temperatures, crucial for applications subjected to elevated temperatures.

These mechanical properties collectively ensure that ER 316LSi sub arc wire produces welds with excellent strength, ductility, and toughness, making it suitable for a wide range of welding applications in industries such as aerospace, automotive, and construction.

ER 316LSi Sub Arc Wire Applications:

  1. Chemical Processing Equipment
  2. Marine and Offshore Structures
  3. Food and Beverage Industry
  4. Pharmaceutical Manufacturing
  5. Petrochemical Plants
  6. Power Generation Facilities
  7. Pulp and Paper Industry
  8. Cryogenic Vessels and Storage Tanks