N0040626Q0177 SOW ENCL 2.2.2.pdf

This document is an enclosure containing mechanical properties specifications per MIL-S-23284A(SH), presented as a reference table for material classification standards.

The table specifies mechanical properties across six material classes, establishing minimum requirements for yield strength, tensile strength, elongation, reduction of area, Charpy V-notch impact resistance, and Brinell hardness. Yield strength at 0.01 percent offset ranges from 35,000 lb/in² (Class 4) to 90,000 lb/in² (Class 6), while tensile strength varies between 60,000 lb/in² and 140,000 lb/in² across the classes. Elongation in 2 inches spans from 18 to 25 percent longitudinally and 16 to 22 percent transversely. Charpy V-notch impact testing is required at specific temperatures (plus 10±3°F, minus 30±3°F, and plus 28±3°F depending on class), with values ranging from 20 to 35 foot-pounds. Brinell hardness on the 10-millimeter standard ball under 3000-kilogram load ranges from 120-165 to 228-294 across the material classes. The table includes footnotes clarifying that transverse properties apply to specific couplings, sleeves, and similar parts; that average values represent the minimum of three tests; and that impact values shall be recorded for information purposes only.