62170905 - Bonarc ER316L Stainless Steel MIG Wire .035 5kg Spool

Technical Overview of Bonarc ER316L MIG Wire

The Bonarc ER316L is a premium quality solid MIG welding wire designed for joining austenitic stainless steels of the 18% Cr / 12% Ni / 2% Mo type, specifically AISI 316 and 316L. This consumable is formulated with an extra-low carbon content (maximum 0.03%), which is critical for minimizing the risk of carbide precipitation at the grain boundaries during the welding process. This feature significantly enhances the weld metal's resistance to intergranular corrosion without the need for post-weld heat treatment.

A defining characteristic of the ER316L classification is the addition of Molybdenum (Mo). The presence of Molybdenum provides the weld deposit with exceptional resistance to pitting and crevice corrosion, particularly in chloride-containing environments such as seawater or acidic chemical solutions. This makes the wire suitable for high-performance applications where standard 308L wires would be insufficient. The wire chemistry is balanced to provide a ferrite number that ensures high resistance to hot cracking while maintaining excellent cryogenic toughness.

This 5kg spool format is ideal for smaller industrial setups or portable MIG units that utilize standard D200 spools. The wire is precision wound to ensure consistent feeding characteristics, reducing liner friction and ensuring stable arc transfer. It is designed for use with direct current electrode positive (DCEP) polarity and performs optimally with shielding gases such as Argon/CO2 (98/2) or Argon/Oxygen mixtures, as well as Helium-based tri-mixes for superior penetration and bead profile.

Metallurgical Properties

The deposited weld metal exhibits high tensile strength and ductility. The controlled silicon content aids in fluidity, ensuring good wetting of the weld toes and a flat bead profile, which reduces post-weld grinding and finishing time. It is suitable for service temperatures ranging from cryogenic levels (-196°C) up to 350°C, covering a broad spectrum of industrial requirements.