2014-T6 Aluminum: High-Strength Cu-Si-Mn Aerospace Alloy
ASTM B209 / AMS 4029 · Published: 2026-06-01 · Updated: 2026-06-02
2014-T6 is a high-strength aluminum-copper-silicon-manganese alloy (3.9-5.0% Cu, 0.5-1.2% Si, 0.4-1.2% Mn) that provides higher strength than 2024 in thick sections due to improved hardenability from the Si addition. Widely used for aircraft...
2014-T6 is a high-strength aluminum-copper-silicon-manganese alloy (3.9-5.0% Cu, 0.5-1.2% Si, 0.4-1.2% Mn) that provides higher strength than 2024 in thick sections due to improved hardenability from the Si addition. Widely used for aircraft structural forgings, truck frames, ordnance components, and high-strength machine parts. The T6 temper (solution-treated and artificially aged) achieves 414 MPa yield strength. Like 2024, 2014 has poor corrosion resistance and must be protected by cladding, anodizing, or painting for service. Not weldable by conventional fusion welding—joining is by rivets or fasteners. The higher silicon content improves high-temperature strength compared to 2024.
Quick Facts
| Category | Aluminum Alloy |
| Standard | ASTM B209 / AMS 4029 |
| Density | 2.80 g/cm³ |
| Yield Strength | 414 MPa (60 ksi) |
| Tensile Strength | 483 MPa (70 ksi) |
Global Equivalents & Cross-Reference
| Alternative Standard / Grade | Action |
|---|---|
| EN AW-2014A | Compare |
| AlCu4SiMg | Compare |
| A2014 | Compare |
| AA2014-T6 | Compare |
| 3.1255 | Compare |
Related Materials
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Frequently Asked Questions
Can 2014 be forged into complex shapes?
Yes, 2014 is one of the most forgeable high-strength aluminum alloys, with excellent flow characteristics at forging temperatures of 420-460°C. It is the standard aircraft forging alloy for landing gear components, wing attachment fittings, and fuselage frames. After forging, solution treatment at 502°C followed by cold-water quenching and artificial aging produces the T6 temper.
References & International Standards
- ASTM International. Standard Specifications for Steel & Metal Alloys. astm.org
- International Organization for Standardization (ISO). Metallic Materials — Cross-Reference Database. iso.org
- American Iron and Steel Institute (AISI). Steel Grade Designations & Equivalents. steel.org
- European Committee for Standardization (CEN). EN Steel Standards & Numbering System. cencenelec.eu