In ER308L filler metal, what does the "L" denote?

In ER308L filler metal, what does the "L" denote?

• A. Low alloy
• B. Low carbon
• C. Low heat input
• D. Large diameter

Answer: (B)

The designation "L" in ER308L filler metal stands for "low carbon." This specification indicates that the filler metal has a reduced carbon content compared to standard ER308 filler metal, which is important in minimizing carbide precipitation in the heat-affected zone during welding. Lower carbon levels reduce the risk of intergranular corrosion and improve resistance to stress corrosion cracking, particularly in applications involving stainless steels. Therefore, using ER308L is beneficial in maintaining the integrity of welded joints in stainless steel applications, especially in environments where corrosion resistance is critical.

The designation "L" in ER308L filler metal stands for "low carbon." This specification indicates that the filler metal has a reduced carbon content compared to standard ER308 filler metal, which is important in minimizing carbide precipitation in the heat-affected zone during welding. Lower carbon levels reduce the risk of intergranular corrosion and improve resistance to stress corrosion cracking, particularly in applications involving stainless steels. Therefore, using ER308L is beneficial in maintaining the integrity of welded joints in stainless steel applications, especially in environments where corrosion resistance is critical.