EN 573-3 Grade 3.3211 O3 – High‑Performance Alloy for Corrosion Resistance & Surface Finish

DIN 3.3211 is a readily available alloy that has good surface finish and ability to be anodized.Easy of weldability and brazability with nice surface finish. Resistance to corrosion from seawater and atmospheric conditions. Suitable for hot forging.

Properties

General

Property	Value	Condition	Related Standards
Density	2.7 g/cm³	O3	EN 573-3, EN 1715-3

Mechanical

Property	Value	Condition	Related Standards	Comment
Elastic modulus	69.0 GPa	O3	EN 573-3, EN 1715-3
	70.0 GPa	O3	EN 573-3, EN 1715-3
Plane-Strain Fracture Toughnes	22.0 - 35.0 MPa·√m			Typical for Wrought 6000 Series Aluminium
Poisson's ratio	0.33 [-]			Typical for Wrought 6000 Series Aluminium
Shear modulus	26.3 GPa	O3	EN 573-3, EN 1715-3
Tensile strength	90.0 - 140.0 MPa	O3	EN 573-3, EN 1715-3

Thermal

Property	Temperature	Value	Condition	Related Standards	Comment
Coefficient of thermal expansion	20 °C	2.3e-05 1/K	O3	EN 573-3, EN 1715-3
	20 °C	2.36e-05 1/K	O3	EN 573-3, EN 1715-3
	100 °C	2.3e-05 1/K	O3	EN 573-3, EN 1715-3
	100 °C	2.36e-05 1/K	O3	EN 573-3, EN 1715-3
Melting point		580.0 - 640.0 °C	O3	EN 573-3, EN 1715-3
		580.0 - 650.0 °C	O3	EN 573-3, EN 1715-3
Specific heat capacity		887.0 - 963.0 J/(kg·K)			Typical for Wrought 6000 Series Aluminium
Thermal conductivity		155.0 - 180.0 W/(m·K)	O3	EN 573-3, EN 1715-3
		170.0 - 200.0 W/(m·K)	O3	EN 573-3, EN 1715-3

Electrical

Property	Value	Condition	Related Standards
Electrical conductivity	22000000.0 - 30000000.0 S/m	O3	EN 573-3, EN 1715-3
	23000000.0 - 27000000.0 S/m	O3	EN 573-3, EN 1715-3
Electrical resistivity	3.33e-08 - 4.55e-08 Ω·m	O3	EN 573-3, EN 1715-3
	3.7e-08 - 4.35e-08 Ω·m	O3	EN 573-3, EN 1715-3

Chemical properties

Property	Value	Condition	Related Standards
Chromium	0.04 - 0.35 %	O3	EN 573-3, EN 1715-3
Copper	0.15 - 0.4 %	O3	EN 573-3, EN 1715-3
Iron	0.70 %	O3	EN 573-3, EN 1715-3
Magnesium	0.8 - 1.2 %	O3	EN 573-3, EN 1715-3
Manganese	0.15 %	O3	EN 573-3, EN 1715-3
Silicon	0.4 - 0.8 %	O3	EN 573-3, EN 1715-3
Titanium	0.15 %	O3	EN 573-3, EN 1715-3
Zinc	0.25 %	O3	EN 573-3, EN 1715-3

Technological properties

Property
Anodizing	decorative: acceptable, Protective: very good
Brazing	hard brazing (with flux/ without flux): good / sufficient, friction soldering: good, soft brazing with flux: acceptable
Corrosion properties	Seawater: good to acceptable, weathering: good
Workability	Bending / Spinning (cold): acceptable (T3, T4) / good (O), Impact extrusion (cold): good (O), Deep drawing / upsetting (Condition) good (O) / good (O)

EN 573-3 Grade 3.3211 H18 – Premium Aluminum Alloy for Corrosion Resistance and High Performance EN 573-3 Grade 3.3211 T39 – Premium Anodizable Aluminum Alloy

Metal