Mil H 6088 Page

An Examination of MIL-H-6088: The Foundational Specification for Heat Treatment of Aluminum Alloys

MIL-H-6088, formally titled “Heat Treatment of Aluminum Alloys,” was a cornerstone U.S. military specification governing the thermal processing of wrought and cast aluminum products. For decades, it provided mandatory requirements for solution heat treatment, quenching, aging, and precipitation hardening to achieve desired mechanical properties in aerospace and defense components. Although officially superseded by SAE AMS2770 and AMS2771, MIL-H-6088’s legacy remains embedded in modern heat-treating practice. mil h 6088

| Parameter | Requirement | |-----------|-------------| | | Alloy-specific (e.g., 2024: 920°F ±10°F; 7075: 870°F ±10°F) | | Soak time | Based on section thickness (1 hour per inch minimum) | | Quenching | Immediate immersion; transfer time ≤15 seconds | | Quench media | Water (80–140°F), polymer, or forced air as approved | | Aging time/temperature | Room temperature (T4) or elevated (T6: 320°F for 18–24 hours) | Although officially superseded by SAE AMS2770 and AMS2771,