Which suffix indicates a composition with 2 1/4% Cr and 1% Mo?

Which suffix indicates a composition with 2 1/4% Cr and 1% Mo?

• A. -B3
• B. -A1
• C. -B6
• D. -B8

Answer: (A)

Suffixes on welding consumables encode their exact alloy content. In the chromium–molybdenum family used for 2-1/4 Cr–1 Mo steels, the B-series designation identifies this class of alloy, and the number after B differentiates the precise chromium and molybdenum levels. The code that corresponds to about 2.25% Cr and 1% Mo is -B3. So this suffix signals that specific composition. Other suffixes like -A1 or -B6 or -B8 point to different Cr/Mo contents (or different alloy families) and therefore do not match the specified 2-1/4 Cr–1 Mo composition.

Suffixes on welding consumables encode their exact alloy content. In the chromium–molybdenum family used for 2-1/4 Cr–1 Mo steels, the B-series designation identifies this class of alloy, and the number after B differentiates the precise chromium and molybdenum levels. The code that corresponds to about 2.25% Cr and 1% Mo is -B3. So this suffix signals that specific composition. Other suffixes like -A1 or -B6 or -B8 point to different Cr/Mo contents (or different alloy families) and therefore do not match the specified 2-1/4 Cr–1 Mo composition.