EN 573-3 Grade 3.1355 H13 Aluminum – High Strength, Formability & Machinability

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	H13	EN 573-3, EN 1301
	2.78 g/cm³	H13	EN 573-3, EN 1301

Mechanical

Property	Value	Condition	Related Standards	Comment
Elastic modulus	73.0 GPa	H13	EN 573-3, EN 1301
Elongation	5.0 %	H13	EN 573-3, EN 1301
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	H13	EN 573-3, EN 1301
Tensile strength	230.0 - 300.0 MPa	H13	EN 573-3, EN 1301

Thermal

Property	Temperature	Value	Condition	Related Standards
Coefficient of thermal expansion	-50 °C	2.11e-05 1/K	H13	EN 573-3, EN 1301
	20 °C	2.11e-05 1/K	H13	EN 573-3, EN 1301
	20 °C	2.2899999999999998e-05 1/K	H13	EN 573-3, EN 1301
	20 °C	2.3199999999999998e-05 1/K	H13	EN 573-3, EN 1301
	20 °C	2.38e-05 1/K	H13	EN 573-3, EN 1301
	20 °C	2.4699999999999997e-05 1/K	H13	EN 573-3, EN 1301
	100 °C	2.2899999999999998e-05 1/K	H13	EN 573-3, EN 1301
	100 °C	2.3199999999999998e-05 1/K	H13	EN 573-3, EN 1301
	200 °C	2.38e-05 1/K	H13	EN 573-3, EN 1301
	300 °C	2.4699999999999997e-05 1/K	H13	EN 573-3, EN 1301
Melting point		505.0 - 640.0 °C	H13	EN 573-3, EN 1301
		505.0 - 635.0 °C	H13	EN 573-3, EN 1301
Specific heat capacity		875.0 J/(kg·K)	H13	EN 573-3, EN 1301
Thermal conductivity		121.0 - 193.0 W/(m·K)	H13	EN 573-3, EN 1301
		130.0 - 150.0 W/(m·K)	H13	EN 573-3, EN 1301

Electrical

Property	Value	Condition	Related Standards
Electrical conductivity	17000000.0 - 29000000.0 S/m	H13	EN 573-3, EN 1301
	18000000.0 - 21000000.0 S/m	H13	EN 573-3, EN 1301
Electrical resistivity	3.45e-08 - 5.88e-08 Ω·m	H13	EN 573-3, EN 1301
	4.76e-08 - 5.56e-08 Ω·m	H13	EN 573-3, EN 1301

Chemical properties

Property	Value	Condition	Related Standards
Chromium	0.1 %	H13	EN 573-3, EN 1301
Copper	3.8 - 4.9 %	H13	EN 573-3, EN 1301
Iron	0.50 %	H13	EN 573-3, EN 1301
Magnesium	1.2 - 1.8 %	H13	EN 573-3, EN 1301
Manganese	0.3 - 0.9 %	H13	EN 573-3, EN 1301
Silicon	0.5 %	H13	EN 573-3, EN 1301
Titanium	0.15 %	H13	EN 573-3, EN 1301
Zinc	0.25 %	H13	EN 573-3, EN 1301

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 3.1255 T652 – High-Strength Aluminum Alloy with Superior Machinability and Weldability WL 3.1924-1 Grade 3.1924 T6: Premium Aluminum Alloy for Aircraft with Superior Heat Resistance

Metal