Material Notes:
ER309 is commonly used for welding similar alloys in wrought or cast form. Occasionally, 309 is used for welding type 304 and similar base metals where severe corrosion conditions exist requiring higher alloy weld metal. ER309 is also used for welding dissimilar metals, such as joining 304 to carbon steel, welding the clad side of 304 clad steels, and applying stainless steel sheet linings to carbon steel shells.Information provided by Universal Wire Works for their line of welding wire and filler metal.