In ASME material grouping, which identifier is used to categorize steels?

In ASME material grouping, which identifier is used to categorize steels?

• A. P number
• B. Q number
• C. R number
• D. S number

Answer: (A)

In ASME material grouping, steels are identified by a P-number. This grouping classifies metals by their chemical composition and weldability, so steels in the same P-number share similar welding characteristics. That makes it possible to apply the same welding procedures and filler metal choices across those steels and keeps procedure qualification consistent. The other identifiers (Q-number, R-number, S-number) serve different purposes in the code and aren’t used to categorize steels by their weldability, so the P-number is the identifier used for steel grouping.

In ASME material grouping, steels are identified by a P-number. This grouping classifies metals by their chemical composition and weldability, so steels in the same P-number share similar welding characteristics. That makes it possible to apply the same welding procedures and filler metal choices across those steels and keeps procedure qualification consistent. The other identifiers (Q-number, R-number, S-number) serve different purposes in the code and aren’t used to categorize steels by their weldability, so the P-number is the identifier used for steel grouping.