62180900 - Bonarc ER316LSi Stainless Steel MIG Wire - 0.035 Inch - 15kg Spool

Technical Overview: Bonarc ER316LSi .035" MIG Wire

The Bonarc ER316LSi is a molybdenum-bearing austenitic stainless steel solid wire with an extra low carbon content and increased silicon level, designed for the Gas Metal Arc Welding (GMAW) process. Conforming to AWS A5.9 ER316LSi standards, this wire is primarily intended for welding type 316 and 316L base metals, but it is also suitable for 304 and 304L grades where higher corrosion resistance is desired. The 0.035" (0.9mm) diameter is a versatile size, suitable for positional welding on thin-to-medium gauge materials.

Metallurgical Advantages:
The "Si" in the classification denotes a higher silicon content (typically 0.65-1.00%), which lowers the surface tension of the molten weld pool. This enhanced fluidity improves the wetting of the weld metal at the toes, significantly reducing the risk of cold lap and undercut while producing a flatter, more concave bead profile. The presence of Molybdenum (Mo) provides increased resistance to pitting and crevice corrosion, particularly in chloride-containing environments like marine atmospheres or chemical processing plants.

Operational Characteristics:
This wire is designed for use with DCEP (Direct Current Electrode Positive) polarity. Recommended shielding gases include Argon/CO2 mixtures (e.g., 98% Ar / 2% CO2) or Argon/Oxygen mixtures (e.g., 98% Ar / 2% O2) to ensure arc stability and minimize spatter. The wire's surface finish and cast are controlled to ensure consistent electrical contact and smooth feeding through standard MIG gun liners, making it suitable for both manual and automated welding applications.

Typical Applications:

• Chemical and petrochemical processing equipment
• Food and beverage storage tanks
• Pharmaceutical piping systems
• Marine fittings and architectural structures