EN 573-3 Aluminum 3.1355 T62 – High‑Strength Alloy for Aerospace Applications

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	T62	EN 573-3, EN 485
	2.78 g/cm³	T62	EN 573-3, EN 485

Mechanical

Property	Value	Condition	Related Standards	Comment
Elastic modulus	73.0 GPa	T62	EN 573-3, EN 485
Hardness, Brinell	128.0 [-]	T62	EN 573-3, EN 485
	129.0 [-]	T62	EN 573-3, EN 485
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	T62	EN 573-3, EN 485
Tensile strength	435.0 MPa	T62	EN 573-3, EN 485
	440.0 MPa	T62	EN 573-3, EN 485

Thermal

Property	Temperature	Value	Condition	Related Standards
Coefficient of thermal expansion	-50 °C	2.11e-05 1/K	T62	EN 573-3, EN 485
	20 °C	2.11e-05 1/K	T62	EN 573-3, EN 485
	20 °C	2.2899999999999998e-05 1/K	T62	EN 573-3, EN 485
	20 °C	2.3199999999999998e-05 1/K	T62	EN 573-3, EN 485
	20 °C	2.38e-05 1/K	T62	EN 573-3, EN 485
	20 °C	2.4699999999999997e-05 1/K	T62	EN 573-3, EN 485
	100 °C	2.2899999999999998e-05 1/K	T62	EN 573-3, EN 485
	100 °C	2.3199999999999998e-05 1/K	T62	EN 573-3, EN 485
	200 °C	2.38e-05 1/K	T62	EN 573-3, EN 485
	300 °C	2.4699999999999997e-05 1/K	T62	EN 573-3, EN 485
Melting point		505.0 - 640.0 °C	T62	EN 573-3, EN 485
		505.0 - 635.0 °C	T62	EN 573-3, EN 485
Specific heat capacity		875.0 J/(kg·K)	T62	EN 573-3, EN 485
Thermal conductivity		121.0 - 193.0 W/(m·K)	T62	EN 573-3, EN 485
		130.0 - 150.0 W/(m·K)	T62	EN 573-3, EN 485

Electrical

Property	Value	Condition	Related Standards
Electrical conductivity	17000000.0 - 29000000.0 S/m	T62	EN 573-3, EN 485
	18000000.0 - 21000000.0 S/m	T62	EN 573-3, EN 485
Electrical resistivity	3.45e-08 - 5.88e-08 Ω·m	T62	EN 573-3, EN 485
	4.76e-08 - 5.56e-08 Ω·m	T62	EN 573-3, EN 485

Chemical properties

Property	Value	Condition	Related Standards
Chromium	0.1 %	T62	EN 573-3, EN 485
Copper	3.8 - 4.9 %	T62	EN 573-3, EN 485
Iron	0.50 %	T62	EN 573-3, EN 485
Magnesium	1.2 - 1.8 %	T62	EN 573-3, EN 485
Manganese	0.3 - 0.9 %	T62	EN 573-3, EN 485
Silicon	0.5 %	T62	EN 573-3, EN 485
Titanium	0.15 %	T62	EN 573-3, EN 485
Zinc	0.25 %	T62	EN 573-3, EN 485

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 T42 Aluminum Alloy – High Strength & Machinability for Aerospace EN 573-3 Grade 3.1655 T4 Aluminum Alloy – High Performance & Precision Machining

Metal