In the GMAW electrode label ER70S-6, what does the '70' represent?

In the GMAW electrode label ER70S-6, what does the '70' represent?

• A. Minimum tensile strength (70, 80, 90, 100 x 1,000)
• B. Chemical composition
• C. Electrode construction
• D. Finish symbol

Answer: (A)

The number after the material class on a GMAW electrode label indicates the minimum tensile strength of the weld metal, measured in ksi (thousands of pounds per square inch). For ER70S-6, the 70 means the weld metal is specified to have a minimum tensile strength of about 70 ksi (70,000 psi). This rating helps you match the electrode to the strength requirements of the joint. It’s not about chemical composition, electrode construction, or finish. The trailing suffix conveys other performance traits, but the 70 specifically denotes tensile strength.

The number after the material class on a GMAW electrode label indicates the minimum tensile strength of the weld metal, measured in ksi (thousands of pounds per square inch). For ER70S-6, the 70 means the weld metal is specified to have a minimum tensile strength of about 70 ksi (70,000 psi). This rating helps you match the electrode to the strength requirements of the joint. It’s not about chemical composition, electrode construction, or finish. The trailing suffix conveys other performance traits, but the 70 specifically denotes tensile strength.