309 Bare Wire Stainless Steel Alloy, 0.045" Diameter, 30lb. Spool, ER309/ ER309L per AWS A5.9

Arcos 309 is commonly used for welding similar alloys in wrought or cast form and for welding dissimilar metals. This wire is also utilized to weld Type 304 and similar base metals, where severe corrosion conditions exist, as well as in dissimilar welds for joining 304 to carbon steel or the clad side of 304 clad steelsApplications: Arcos 309/309L joins Types 304, 347, 321 and 316 and duplex stainless steels to mild and low alloy steels This electrode can also provide a buffer layer prior to surfacing for 308L for corrosion resistant overlays and is often used for dissimilar welds because of its tolerance for dilutionShielding Gases: GMAW - 95-98% Ar/2-5% O2, 97-98% Ar/2-3% CO2, 90% He/7-8% Ar/2-3% CO2 for short circuit transfer only GTAW - 100%Ar or Ar/25- 75%He