In the designation E4918-X, the digits '49' indicate a minimum tensile strength.

• A. True
• B. Cannot be determined
• C. Only the suffix indicates strength
• D. False

Answer: (D)

In this designation system, the numeric portion after the E is a classification code, not a simple readout of a single property like minimum tensile strength. The two digits shown as “49” are not a direct indicator of the weld metal’s minimum tensile strength by themselves; the actual strength value (if specified at all) is defined in the standard’s tables and depends on the full code, including any suffix. Reading the digits in isolation to claim a specific tensile strength would be misinterpreting the code. To know the true tensile strength, you’d consult the standard or the supplier’s data sheet rather than assuming the digits alone represent it. So the statement is not correct.