2017 O Aluminum
2017 Aluminum Alloy (AlCuMgSi) is primarily composed of aluminum, copper, magnesium, and silicon, with a higher copper content, giving it higher strength compared to other aluminum alloys. 2017-O aluminum alloy is in the annealed state (O state), meaning it has undergone high-temperature annealing during processing to improve its plasticity and formability. Compared to other heat-treated states (such as T3, T4), 2017-O aluminum has lower strength but better machinability, making it suitable for complex shapes or parts requiring further processing.
| Property | Description |
| Strength | Moderate |
| Machining | Excellent |
| Weldability | Average |
| Formability | Good |
| Corrosion Resistance | Fair |
| Heat Treating | Yes |
2017 O Aluminum Standards and Designations
Aluminium 2017-O; UNS A92017; QQ-A-4300; QQ-A-222/5; NF A-U46 (France); MIL-R-430; ISO AlCuMgSi, CM41 (Canada); AA2070-O; Al2017-O
Here is a table displaying the standard designations and specifications for 2017-O in various forms:
| Form | Standards and Specifications |
| 2017 O Aluminum Sheet/Plate | ASTM B209, ISO AlCu4MgSi, UNS A92017, WNR 3.1325, DIN AlCuMg1 |
| 2017 O Aluminum Extruded Round/Flat Bar | AMS QQ-A-200/2, ASTM B221, UNS A92017, WNR 3.1325, DIN AlCuMg1 |
| 2017 O Aluminum Cold Drawn Round/Flat Bar | AMS QQ-A-225/5, ASTM B211, UNS A92017, WNR 3.1325, DIN AlCuMg1, ASTM B565, ASTM B316 |
2017 O Aluminum Properties
- Strength: The strength of 2017-O aluminum alloy is relatively low, making it the weakest version within the 2017 series. However, it still has higher strength than many other aluminum alloys, making it suitable for structural components that require moderate strength.
- Machinability: 2017-O aluminum alloy has good machinability, especially suitable for further processing into complex shapes through machining methods such as cutting, turning, and milling. Its plasticity in the O state is good, allowing for deep processing at lower temperatures.
- Weldability: The weldability of 2017 aluminum alloy is poor, especially in the O state. Due to its higher copper content, hot cracking can occur during welding, so special welding techniques are usually required.
- Corrosion Resistance: The corrosion resistance of 2017 aluminum alloy is relatively low, particularly when exposed to corrosive environments such as chlorides. Surface treatments (such as anodizing) may be needed to improve its corrosion resistance.
2017 O Aluminum Material Information
| Physical Properties | Metric | English | Comments |
| Density | 2.79 g/cc | 0.101 lb/in³ | AA; Typical |
| Mechanical Properties | |||
| Hardness, Brinell | 45 | 45 | AA; Typical; 500 g load; 10 mm ball |
| Ultimate Tensile Strength | 179 MPa | 26000 psi | AA; Typical |
| Tensile Yield Strength | 68.9 MPa | 10000 psi | AA; Typical |
| Elongation at Break | 22 % | 22 % | AA; Typical; 1/2 in. (12.7 mm) Diameter |
| Modulus of Elasticity | 72.4 GPa | 10500 ksi | AA; Typical; Average of tension and compression. Compression modulus is about 2% greater than tensile modulus. |
| Poisson's Ratio | 0.33 | 0.33 | Estimated from trends in similar Al alloys. |
| Fatigue Strength | 89.6 MPa | 13000 psi | AA; 500,000,000 cycles completely reversed stress; RR Moore machine/specimen |
| Shear Modulus | 27 GPa | 3920 ksi | Estimated from similar Al alloys. |
| Shear Strength | 124 MPa | 18000 psi | AA; Typical |
| Electrical Properties | |||
| Electrical Resistivity | 3.49e-006 ohm-cm | 3.49e-006 ohm-cm | AA; Typical at 68°F |
| Thermal Properties | |||
| CTE, linear 68°F | 23.6 µm/m-°C | 13.1 µin/in-°F | AA; Typical; Average over 68-212°F range. |
| CTE, linear 250°C | 25.4 µm/m-°C | 14.1 µin/in-°F | Estimated from trends in similar Al alloys. 20-300°C. |
| Specific Heat Capacity | 0.88 J/g-°C | 0.21 BTU/lb-°F | Estimated from trends in similar Al alloys. |
| Thermal Conductivity | 193 W/m-K | 1340 BTU-in/hr-ft²-°F | AA; Typical at 77°F |
| Melting Point | 513 - 641 °C | 955 - 1185 °F | AA; Typical range based on typical composition for wrought products 1/4 inch thickness or greater. Eutectic melting is not eliminated by homogenization. |
| Solidus | 513 °C | 955 °F | AA; Typical |
| Liquidus | 641 °C | 1185 °F | AA; Typical |
| Processing Properties | |||
| Annealing Temperature | 338 - 349 °C | 640 - 660 °F | cold-work anneal |
| Annealing Temperature | 413 °C | 775 °F | heat treated anneal |
| Solution Temperature | 499 - 510 °C | 930 - 950 °F | |
| Aging Temperature | 22.2 °C | 72 °F | |
2017 O Aluminum Chemical Properties
| Chemical Properties | % Value |
| Silicon (Si) | 0,20 - 0,80 |
| Chromium (Cr) | 0,00 - 0,10 |
| Manganese (Mn) | 0,40 - 1,0 |
| Magnesium (Mg) | 0,40 - 1,00 |
| Copper (Cu) | 3,50 - 4,50 |
| Titanium (Ti) | 0,00 - 0,25 |
| Iron (Fe) | 0,00 - 0,70 |
| Zinc (Zn) | 0,00 - 0,25 |
| Aluminium (Al) | Balance |
2017 O Aluminum Supplied Forms
2017 O is produced/supplied in plate/sheet, round/flat bar and tube/profile forms.
Plate/Sheet
Rod Round Bar Flat Bar
Tube/Profile
| Product Form | Thickness/Size Range | Characteristics | Applications |
| 2017 Aluminum Plate/Sheet | Thickness ranges from a few millimeters to several tens of millimeters | Good ductility, suitable for cold working, stamping, and stretching | Aerospace (aircraft fuselage, wing skins, load-bearing structural parts), transportation, automotive manufacturing, etc. |
| 2017 Aluminum Rod, Round Bar, Flat Bar | Customizable according to requirements | Good ductility and machinability, suitable for further heat treatment to enhance strength | Aerospace (engine components, mechanical structural parts, fasteners), automotive parts, aircraft frames, etc. |
| 2017 Aluminum Tube/Profile | Various outer diameters and wall thicknesses, complex cross-section shapes | Good machinability, meets the needs of complex geometries and precise dimensions | Aerospace (fuel lines, pneumatic system pipelines), automotive, construction, machinery, etc. |
Advantages of 2017 O Aluminum
- Formability: Due to its good ductility in the O state, 2017-O aluminum is more suitable for parts with complex shapes or those requiring high-precision processing. Its excellent formability allows it to maintain good surface quality after being processed by complex molds and tools.
- Suitable for Mass Production: Due to its good formability, 2017-O aluminum is ideal for mass-producing structural parts, especially in situations requiring extensive machining.
- Excellent Machinability: 2017-O aluminum alloy is easy to machine in the O state, making it suitable for producing complex parts in fields like aerospace, military, and automotive that require further processing.
Applications of 2017 O Aluminum
2017-O aluminum alloy is widely used in engineering fields that require high strength, good formability, and machinability.
Aerospace Industry
2017-O aluminum alloy is widely used in the structural components of aircraft, especially parts requiring complex shapes such as fuselage, wings, and tail sections. Its excellent machinability makes it an ideal choice for some complex aerospace structural parts.
Used to manufacture high-strength structural components for aircraft, particularly those that require further machining (such as milling, turning, etc.).
Military Applications
In military equipment, 2017-O aluminum is commonly used to manufacture parts that require medium strength, such as armored vehicle bodies and weapon components.
Suitable for manufacturing parts with high strength requirements, such as structural components for military aircraft and military vehicles.
Bridge and Building Structures
2017-O aluminum alloy is also used in bridge and building structures, especially for parts that require both high strength and excellent machinability.
Used to manufacture bridge connectors, support structures, framing components, etc., which typically require good formability and machinability.
Other Structural Applications
Used to manufacture medium-strength structural components and high-strength frames, supports, etc., especially in parts requiring further processing.
With its good formability, moderate strength, and good machinability, 2017-O aluminum alloy is widely used in aerospace, military, bridge, construction, and other fields.