In the SAW filler metal wire code EL8K, what does the letter K denote?

In the SAW filler metal wire code EL8K, what does the letter K denote?

• A. Killed steel (silicon killed)
• B. Mild steel
• C. High-strength steel
• D. Alloy steel

Answer: (A)

The letter K in this SAW filler metal code flags the steelmaking/deoxidation method used for the wire. Specifically, it denotes killed steel, typically silicon-killed. Killed steel is fully deoxidized to remove oxygen during solidification, which minimizes gas porosity and yields a more uniform weld metal composition. This deoxidation choice is common in SAW wires to promote stable arc and clean welds. It isn’t a label for mild, high-strength, or alloy steel by itself; those qualities would be indicated by other designations or features. So the K means killed steel (silicon-killed).

The letter K in this SAW filler metal code flags the steelmaking/deoxidation method used for the wire. Specifically, it denotes killed steel, typically silicon-killed. Killed steel is fully deoxidized to remove oxygen during solidification, which minimizes gas porosity and yields a more uniform weld metal composition. This deoxidation choice is common in SAW wires to promote stable arc and clean welds. It isn’t a label for mild, high-strength, or alloy steel by itself; those qualities would be indicated by other designations or features. So the K means killed steel (silicon-killed).