EN 573-3 Grade 3.1355 T8510 – Premium Aircraft‑Grade Aluminum Alloy

Aluminum DIN 3.1355, known for its use in aircraft industry, is an alloy that offers excellent strength. When in the annealed condition it is readily formed and has good machinability. Though it has a relatively low level of corrosion resistance, it can be machined to a high finish.

Properties

General

Property	Value	Condition	Related Standards
Density	2.77 g/cm³	T8510	EN 573-3, EN 755
	2.78 g/cm³	T8510	EN 573-3, EN 755

Mechanical

Property	Value	Condition	Related Standards	Comment
Elastic modulus	73.0 GPa	T8510	EN 573-3, EN 755
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	27.4 GPa	T8510	EN 573-3, EN 755
Tensile strength	455.0 MPa	T8510	EN 573-3, EN 755

Thermal

Property	Temperature	Value	Condition	Related Standards
Coefficient of thermal expansion	-50 °C	2.11e-05 1/K	T8510	EN 573-3, EN 755
	20 °C	2.11e-05 1/K	T8510	EN 573-3, EN 755
	20 °C	2.2899999999999998e-05 1/K	T8510	EN 573-3, EN 755
	20 °C	2.3199999999999998e-05 1/K	T8510	EN 573-3, EN 755
	20 °C	2.38e-05 1/K	T8510	EN 573-3, EN 755
	20 °C	2.4699999999999997e-05 1/K	T8510	EN 573-3, EN 755
	100 °C	2.2899999999999998e-05 1/K	T8510	EN 573-3, EN 755
	100 °C	2.3199999999999998e-05 1/K	T8510	EN 573-3, EN 755
	200 °C	2.38e-05 1/K	T8510	EN 573-3, EN 755
	300 °C	2.4699999999999997e-05 1/K	T8510	EN 573-3, EN 755
Melting point		505.0 - 640.0 °C	T8510	EN 573-3, EN 755
		505.0 - 635.0 °C	T8510	EN 573-3, EN 755
Specific heat capacity		875.0 J/(kg·K)	T8510	EN 573-3, EN 755
Thermal conductivity		121.0 - 193.0 W/(m·K)	T8510	EN 573-3, EN 755
		130.0 - 150.0 W/(m·K)	T8510	EN 573-3, EN 755

Electrical

Property	Value	Condition	Related Standards
Electrical conductivity	17000000.0 - 29000000.0 S/m	T8510	EN 573-3, EN 755
	18000000.0 - 21000000.0 S/m	T8510	EN 573-3, EN 755
Electrical resistivity	3.45e-08 - 5.88e-08 Ω·m	T8510	EN 573-3, EN 755
	4.76e-08 - 5.56e-08 Ω·m	T8510	EN 573-3, EN 755

Chemical properties

Property	Value	Condition	Related Standards
Chromium	0.1 %	T8510	EN 573-3, EN 755
Copper	3.8 - 4.9 %	T8510	EN 573-3, EN 755
Iron	0.50 %	T8510	EN 573-3, EN 755
Magnesium	1.2 - 1.8 %	T8510	EN 573-3, EN 755
Manganese	0.3 - 0.9 %	T8510	EN 573-3, EN 755
Silicon	0.5 %	T8510	EN 573-3, EN 755
Titanium	0.15 %	T8510	EN 573-3, EN 755
Zinc	0.25 %	T8510	EN 573-3, EN 755

Technological properties

Property
Anodizing	decorative: not suitable, Protective: good
Brazing	hard brazing (with flux/ without flux): not suitable / not suitable, friction soldering: acceptable, soft brazing with flux: not suitable
Corrosion properties	Seawater: poor, weathering: poor
Workability	Bending / Spinning (cold): sufficient (O) / acceptable (O), Impact extrusion (cold): acceptable (O), Deep drawing / upsetting (Condition) acceptable (O) / sufficient (O)

EN 573-3 Grade 3.1355 T651 – High-Strength Aluminum Alloy for Aerospace EN 573-3 Grade 3.1355 (T8511) – High-Strength Aluminum Alloy for Aerospace Applications

Metal