For ER309. The nominal composition (wt.-%) of this classification is 24 Cr, 13 Ni. Filler metals of this classification are commonly used for welding similar alloys in wrought or cast form. Occasionally, they are used to weld Type 304 and similar base metals where severe corrosion conditions exist requiring higher alloy weld metal. They are also used in dissimilar metal welds, such as joining Type 304 to carbon steel, welding the clad side of Type 304 clad steels, and applying stainless steel sheet linings to carbon steel shells.
ER309L. This classification is the same as ER309, except for the carbon content. Low carbon (0.03 percent maximum) in this filler metal reduces the possibility of intergranular carbide precipitation. This increases the resistance to intergranular corrosion without the use of stabilizers such as niobium or titanium. Strength of this low-carbon alloy, however, may not be as great at elevated temperatures as that of the niobium-stabilized alloys or ER309. Steel stamp of AWS Classification "ER309L" , the letter is at the end of the rod, but only the size above (sometimes include) 1/16".
Please Note: For saving paper and better protect the environment, we do not pack any user guide made by paper into the pvc tube from Dec 1, 2021. As another choise, you can download the PDF or JPG version of the user guide and the MSDS file from the web link.