WL 3.1924-1: High-Strength AlCuMgFeNi Alloy for Aircraft Construction

Alloy AlCu2MgNi (AlCuMgFeNi) is an especially for aircraft construction modified alloy of type AlCuMg. Beside 2,5 % Cu it contains 1,5 % Mg as well as 1,1 % Fe and Ni. It is a natural and artificial ageable, high-strength alloy and achieves tensile strength values up to 430MPa at A5-ductile yiled of 3 to 8%. Heat-resistance properties of this alloy are enhancable by Fe- and Ni-content what represents the dominating application attribute. Heat-treatment instructions have to be most accurately adhered in order to warrant high heat-strength up to 250 deg. C. Usual semi-finished forms are thick plates, rods as well as die and free-form forged parts. This material has a high machinability, anodizability and hot-workability. It is cold-workable in soft condition resp. 2 h after solution annealing only. The alloy is not suitable for welding. Its corrosion resistance is satisfactory only. Application: in aircraft construction for large structure and power plant parts.

Properties

General

Property	Value	Comment
Density	2.75 - 2.84 g/cm³	Typical for Wrought 2000 Series Aluminium

Mechanical

Property	Temperature	Value	Condition	Related Standards	Shape	Comment
Elastic modulus		70.0 - 73.0 GPa				Typical for Wrought 2000 Series Aluminium
Hardness, Brinell	20.0 °C	125.0 [-]	T652	WL 3.1924-1	Forging	Transverse
	20.0 °C	125.0 [-]	T652	WL 3.1924-1	Forging
Plane-Strain Fracture Toughnes		22.0 - 35.0 MPa·√m				Typical for Wrought 2000 Series Aluminium
Poisson's ratio		0.33 [-]				Typical for Wrought 2000 Series Aluminium
Shear modulus		26.0 - 27.5 GPa				Typical for Wrought 2000 Series Aluminium
Tensile strength	20.0 °C	380.0 MPa	T652	WL 3.1924-1	Forging	Transverse
	20.0 °C	390.0 MPa	T652	WL 3.1924-1	Forging	Transverse
	20.0 °C	400.0 MPa	T652	WL 3.1924-1	Forging
	20.0 °C	410.0 MPa	T652	WL 3.1924-1	Forging	Transverse
	20.0 °C	420.0 MPa	T652	WL 3.1924-1	Forging

Thermal

Property	Value	Comment
Coefficient of thermal expansion	1.6e-05 - 2.4e-05 1/K	Typical for Wrought 2000 Series Aluminium
Melting point	500.0 - 650.0 °C	Typical for Wrought 2000 Series Aluminium
Specific heat capacity	816.0 - 963.0 J/(kg·K)	Typical for Wrought 2000 Series Aluminium
Thermal conductivity	112.0 - 251.0 W/(m·K)	Typical for Wrought 2000 Series Aluminium

Electrical

Property	Value	Comment
Electrical conductivity	18000000.0 - 30000000.0 S/m	Typical for Wrought 2000 Series Aluminium
Electrical resistivity	3.4e-08 - 6e-08 Ω·m	Typical for Wrought 2000 Series Aluminium

Chemical properties

Property	Value	Condition	Related Standards	Shape
Copper	1.8 - 2.7 %	T652	WL 3.1924-1	Forging
Iron	0.9 - 1.4 %	T652	WL 3.1924-1	Forging
Magnesium	1.2 - 1.8 %	T652	WL 3.1924-1	Forging
Manganese	0.2	T652	WL 3.1924-1	Forging
Nickel	0.8 - 1.4 %	T652	WL 3.1924-1	Forging
Silicon	0.15 - 0.25 %	T652	WL 3.1924-1	Forging
Titanium	0.2	T652	WL 3.1924-1	Forging
Zinc	0.1	T652	WL 3.1924-1	Forging

Technological properties

Property
Workability	Moderate Workability

Property

Workability

Moderate Workability

WL 3.1924-1 Grade 3.1924 T6: Premium Aluminum Alloy for Aircraft with Superior Heat Resistance DIN 1725-1 Grade 3.2315 T3 – High-Strength AlMgSi Alloy for Precision Applications

Metal