ALLOY 2026 PRODUCTS ALCOA AEROSPACE （2026合金产品美国铝业航空航天）.pdf

ALLOY 2026 PRODUCTS ALCOA AEROSPACE TECHNICAL FACT SHEET New Generation Highly Damage Tolerant • Highly Formable • Extrusion Alloy D E S C R I P T I O N Alcoa developed Extrusion Alloy 2026 as an improvement over Alloys 2024 and 2224 extrusions, and is a candidate alloy for aerospace structural applications where the governing selection criteria are high damage tolerance, good fatigue resistance and a high degree of manufacturability. Benefits of Alloy 2026-T3511 extrusions include: • 10% higher minimum tensile strength • Higher strength relative to 2024-T3511 • Higher fracture toughness than 2024-T3511 • Better resistance to fatigue crack growth • Reduction of coarse-grain “recrystallization layer” • Low machining distortion A P P L I C A T I O N Alcoa Extrusion Alloy 2026 was developed as an improvement over incumbent Alloys 2024 and 2224 extrusions in aerospace structural applications where the governing selection criteria are high damage tolerance, good fatigue resistance and a high degree of manufacturability. The improved resistance to fatigue crack propagation and higher fracture toughness of Alloy 2026 permit increased intervals between inspections and improved residual strength. In addition to improved damage tolerance, extrusion Alloy 2026-T3511 also has significantly higher “A”- basis minimum strengths than 2024-T3511 and 2224-T3511. Extrusion Alloy 2026-T3511 also reduces manufacturing costs compared to Alloys 2024-T3511 and 2224-T3511 through improved formability and by providing a thinner coarse recrystallized surface layer, which requires less machining and improves buy/fly. 2026-T3511 extrusion is currently available in a thickness ranging from 0.249 – 3.250 in. Alloy 2026 is also