2017 T4 Aluminum

2017-T4 aluminum alloy is the T4 form of 2017 aluminum alloy. To achieve this state, 2017 aluminum alloy is first subjected to solution heat treatment and then undergoes a natural aging process. The solution heat treatment usually involves heating the aluminum alloy to a high temperature to evenly distribute the solute elements in the alloy, followed by rapid cooling. During the subsequent natural aging phase, the metal slowly ages at room temperature, eventually reaching its optimal ductility and mechanical properties.

Compared to other heat-treated states of 2017 aluminum alloy, such as T6 or T3, the T4 temper has the highest ductility. Ductility refers to the material's ability to deform under external forces, so T4-treated 2017 aluminum alloy is highly valuable for applications that require good formability or ease of processing. This alloy is commonly used in the manufacturing of components that require deep forming or complex processing, such as structural parts in aerospace, transportation, and mechanical industries.

Although 2017 aluminum in the T4 temper has excellent ductility, its strength is relatively lower. To achieve higher strength, other heat-treated states, such as T6, may be needed. However, for applications that require excellent processing performance, the T4 temper still offers irreplaceable advantages.

2017 O Aluminum Standards and Designations

Aluminium 2017-T4; UNS A92017; ISO AlCuMgSi; AA2017-T4, Aluminium 2017-T451; QQ-A-4300; QQ-A-222/5; CM41 (Canada); NF A-U46 (France); MIL-R-430; AA2017-T451; Al2017-T4

2017 T4 Aluminum Supplied Forms

Form	Description	Common Uses	Key Characteristics
2017-T4 Aluminum Plate	Thick, flat section of aluminum used for structural components requiring high strength.	Aircraft fuselage panels Aerospace structures Pressure vessels Military components	High strength Good machinability Moderate corrosion resistance Can be further processed
2017-T4 Aluminum Sheet	Thin, flat section of aluminum, often used for lighter structural components.	Aircraft wing and fuselage skin Aerospace cladding Lightweight structural parts	Lightweight High strength-to-weight ratio Good formability Moderate corrosion resistance
2017-T4 Aluminum Square Bar	Solid, square-shaped extrusion or rod used for precision machining and structural parts.	Aircraft parts Aerospace structures Tooling and fixtures	Easy to machine High strength Can be welded (requires pre-weld treatment) Moderate SCC risk
2017-T4 Aluminum Round Bar	Solid, cylindrical form, ideal for making round components, shafts, and pins.	Aircraft shafts, pins, rods Aerospace machinery High-stress structural parts	High strength Excellent for machining Good fatigue resistance Moderate corrosion resistance
2017-T4 Aluminum Hex Bar	Solid, hexagonal-shaped extrusion used for parts that require additional surface area or a specific geometry.	Aerospace structural parts Machine components Fasteners and high-strength parts	High machinability Good mechanical properties Used in high-strength applications
2017-T4 Aluminum Profile	Custom or standard extruded sections with various shapes, used for structural components and frames.	Aerospace frames Aircraft interior supports Industrial machinery frames	Customizable shapes High strength and lightweight Ideal for complex designs

2017 T4 Aluminum Material Property Data Sheet

Physical Properties	Metric	English	Comments
Density	2.79 g/cc	0.101 lb/in³	AA; Typical
2017 T4 Aluminum Mechanical Properties
Hardness, Brinell	105	105	AA; Typical; 500 g load; 10 mm ball
Hardness, Knoop	132	132	Converted from Brinell Hardness Value
Hardness, Rockwell A	42.5	42.5	Converted from Brinell Hardness Value
Hardness, Rockwell B	66	66	Converted from Brinell Hardness Value
Hardness, Vickers	118	118	Converted from Brinell Hardness Value
Ultimate Tensile Strength	427 MPa	62000 psi	AA; Typical
Tensile Yield Strength	276 MPa	40000 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	124 MPa	18000 psi	AA; 500,000,000 cycles completely reversed stress; RR Moore machine/specimen
Machinability	70 %	70 %	0-100 Scale of Aluminum Alloys
Shear Modulus	27 GPa	3920 ksi	Estimated from similar Al alloys.
Shear Strength	262 MPa	38000 psi	AA; Typical
2017 T4 Aluminum Electrical Properties
Electrical Resistivity	5.15e-006 ohm-cm	5.15e-006 ohm-cm	AA; Typical at 68°F
2017 T4 Aluminum 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	134 W/m-K	930 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
2017 T4 Aluminum 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