Which electrode suffix indicates improved impact properties?

Which electrode suffix indicates improved impact properties?

• A. -1
• B. -2
• C. -3
• D. -4

Answer: (A)

Impact properties describe how tough the weld metal is when it experiences a sudden or impact loading, especially at lower temperatures. Electrode classifications include suffixes that indicate these toughness requirements. A suffix with the smallest numeral on that scale represents higher notch toughness, meaning the weld will absorb more energy before fracturing. In practice, choosing this suffix gives better resistance to brittle fracture in cold or dynamic service. The higher-number suffixes correspond to lower impact resistance, so they’re less protective in those conditions. So, when you’re aiming for improved impact properties, the suffix with the smallest numeral is the best choice.

Impact properties describe how tough the weld metal is when it experiences a sudden or impact loading, especially at lower temperatures. Electrode classifications include suffixes that indicate these toughness requirements. A suffix with the smallest numeral on that scale represents higher notch toughness, meaning the weld will absorb more energy before fracturing. In practice, choosing this suffix gives better resistance to brittle fracture in cold or dynamic service. The higher-number suffixes correspond to lower impact resistance, so they’re less protective in those conditions. So, when you’re aiming for improved impact properties, the suffix with the smallest numeral is the best choice.