What does the fourth digit (8) in the electrode designation indicate?

What does the fourth digit (8) in the electrode designation indicate?

• A. The coating type and the current to be used
• B. The diameter
• C. The welding position
• D. The tensile strength

Answer: (A)

The digits in an electrode designation are a code for the weld properties you’ll get from that electrode. The first two digits tell you the minimum tensile strength the weld metal should have, and the third digit indicates the welding position the electrode is intended for. The fourth digit, where this example uses 8, indicates the coating type and the current to be used with that electrode. That last digit maps to a specific coating composition and polarity/current options defined by the AWS standard. The coating affects arc characteristics and slag behavior, while the current type (AC or DC and polarity) affects arc stability and penetration. So the fourth digit is all about which coating/current you must use to achieve the expected weld performance. If you need the exact meaning of the number 8 for a given electrode family, you’d reference the AWS table that maps that digit to its coating and current specification.

The digits in an electrode designation are a code for the weld properties you’ll get from that electrode. The first two digits tell you the minimum tensile strength the weld metal should have, and the third digit indicates the welding position the electrode is intended for. The fourth digit, where this example uses 8, indicates the coating type and the current to be used with that electrode. That last digit maps to a specific coating composition and polarity/current options defined by the AWS standard. The coating affects arc characteristics and slag behavior, while the current type (AC or DC and polarity) affects arc stability and penetration. So the fourth digit is all about which coating/current you must use to achieve the expected weld performance. If you need the exact meaning of the number 8 for a given electrode family, you’d reference the AWS table that maps that digit to its coating and current specification.