EN 573-3 Grade 3.3211 T39 – Premium Anodizable Aluminum Alloy

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	T39	EN 573-3, EN 1301

Mechanical

Property	Value	Condition	Related Standards	Comment
Elastic modulus	69.0 GPa	T39	EN 573-3, EN 1301
	70.0 GPa	T39	EN 573-3, EN 1301
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	T39	EN 573-3, EN 1301
Tensile strength	260.0 MPa	T39	EN 573-3, EN 1301
	310.0 MPa	T39	EN 573-3, EN 1301

Thermal

Property	Temperature	Value	Condition	Related Standards	Comment
Coefficient of thermal expansion	20 °C	2.3e-05 1/K	T39	EN 573-3, EN 1301
	20 °C	2.36e-05 1/K	T39	EN 573-3, EN 1301
	100 °C	2.3e-05 1/K	T39	EN 573-3, EN 1301
	100 °C	2.36e-05 1/K	T39	EN 573-3, EN 1301
Melting point		580.0 - 640.0 °C	T39	EN 573-3, EN 1301
		580.0 - 650.0 °C	T39	EN 573-3, EN 1301
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)	T39	EN 573-3, EN 1301
		170.0 - 200.0 W/(m·K)	T39	EN 573-3, EN 1301

Electrical

Property	Value	Condition	Related Standards
Electrical conductivity	22000000.0 - 30000000.0 S/m	T39	EN 573-3, EN 1301
	23000000.0 - 27000000.0 S/m	T39	EN 573-3, EN 1301
Electrical resistivity	3.33e-08 - 4.55e-08 Ω·m	T39	EN 573-3, EN 1301
	3.7e-08 - 4.35e-08 Ω·m	T39	EN 573-3, EN 1301

Chemical properties

Property	Value	Condition	Related Standards
Chromium	0.04 - 0.35 %	T39	EN 573-3, EN 1301
Copper	0.15 - 0.4 %	T39	EN 573-3, EN 1301
Iron	0.70 %	T39	EN 573-3, EN 1301
Magnesium	0.8 - 1.2 %	T39	EN 573-3, EN 1301
Manganese	0.15 %	T39	EN 573-3, EN 1301
Silicon	0.4 - 0.8 %	T39	EN 573-3, EN 1301
Titanium	0.15 %	T39	EN 573-3, EN 1301
Zinc	0.25 %	T39	EN 573-3, EN 1301

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 O3 – High‑Performance Alloy for Corrosion Resistance & Surface Finish EN 10273 Grade P275NH Steel: Normalized or Normalized Formed (+N) – High-Temperature Pressure Vessel Grade

Metal