EDM23447735 - Murex ER316LSi .045 Stainless MIG Wire 25lb Spool

Technical Specification: Murex ER316LSi .045"

The Murex ER316LSi .045" MIG Wire is a high-performance austenitic stainless steel welding wire designed for the Gas Metal Arc Welding (GMAW) process. This wire meets the AWS A5.9 classification for ER316LSi, featuring a nominal composition of 19% Chromium, 12% Nickel, and 2.5% Molybdenum, with a controlled carbon content of less than 0.03% and an elevated silicon content of 0.65-1.00%. The higher silicon level is the key differentiator, significantly improving the wetting action of the weld metal. This results in a concave bead profile with excellent tie-in at the toes, reducing the risk of cold lap and stress risers, while also improving the overall cosmetic appearance of the weld.

For the professional welder, the .045" (1.2mm) diameter is a versatile choice, capable of high deposition rates in the spray transfer mode when used with appropriate shielding gas mixtures, such as 98% Argon / 2% Oxygen or Argon / 2-5% CO2. It is also suitable for pulsed MIG applications, allowing for out-of-position welding on thicker sections. The 25lb (11.3kg) spool is designed for standard wire feeders and features a high-quality cast and helix, ensuring the wire feeds centrally through the contact tip for optimal electrical conductivity and arc stability. This reduces micro-arcing inside the tip and extends consumable life.

Metallurgically, the low carbon content prevents carbide precipitation at the grain boundaries, thereby preserving the intergranular corrosion resistance of the weld zone without the need for post-weld heat treatment. The molybdenum addition ensures superior resistance to corrosion from organic and inorganic acids. This wire is the preferred choice for welding base metals of similar composition (316, 316L) and can also be used for joining 304 type stainless steels where added corrosion protection is desired. It is widely utilized in the fabrication of pressure vessels, food processing machinery, and piping systems where sanitary and corrosion-resistant welds are mandatory.