In the ER70S-6 label, the '-6' portion indicates which aspect?

In the ER70S-6 label, the '-6' portion indicates which aspect?

• A. Chemical composition (number = carbon steel, letter and number = low-alloy steel)
• B. Tensile strength
• C. Coating type
• D. Welding position rating

Answer: (A)

In the ER70S-6 designation, the part after the S is a code for how the filler metal is formulated for welding performance. The 70 portion tells you the weld metal’s minimum tensile strength (about 70 ksi), and the S indicates a solid wire electrode. The final code conveys the level of deoxidizers (silicon and manganese) included in the alloy. A higher deoxidizer level helps the weld wet properly and reduces porosity when welding over dirty, oily, or rusty base metal, improving puddle control and stability. It isn’t describing the chemical composition like carbon content or whether the metal is carbon steel versus low-alloy; that classification comes from other parts of the code.

In the ER70S-6 designation, the part after the S is a code for how the filler metal is formulated for welding performance. The 70 portion tells you the weld metal’s minimum tensile strength (about 70 ksi), and the S indicates a solid wire electrode. The final code conveys the level of deoxidizers (silicon and manganese) included in the alloy. A higher deoxidizer level helps the weld wet properly and reduces porosity when welding over dirty, oily, or rusty base metal, improving puddle control and stability. It isn’t describing the chemical composition like carbon content or whether the metal is carbon steel versus low-alloy; that classification comes from other parts of the code.