Yield stress and endurance limit data for ASTM A513 steel is not directly provided in the specification, which primarily details manufacturing properties for various alloys. Users seeking specific material properties must identify the exact alloy used in their tubing, as the spec covers multiple alloys with differing characteristics. Resources like MMPDS and MIL-HDBK-5J are recommended for finding specific alloy data. The discussion emphasizes the importance of knowing the alloy type to obtain accurate material properties. Accurate identification of the alloy is crucial for accessing the relevant mechanical properties.