EN 573-3 Grade 3.3211 T451 Alloy – Corrosion-Resistant, Weldable & Anodizable

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	T451	EN 573-3, EN 485

Mechanical

Property	Value	Condition	Related Standards	Comment
Bending angle 90°	1.0 °/t	T451	EN 573-3, EN 485
	1.5 °/t	T451	EN 573-3, EN 485
	3.0 °/t	T451	EN 573-3, EN 485
	4.0 °/t	T451	EN 573-3, EN 485
Elastic modulus	69.0 GPa	T451	EN 573-3, EN 485
	70.0 GPa	T451	EN 573-3, EN 485
Hardness, Brinell	58.0 [-]	T451	EN 573-3, EN 485
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	T451	EN 573-3, EN 485
Tensile strength	205.0 MPa	T451	EN 573-3, EN 485

Thermal

Property	Temperature	Value	Condition	Related Standards	Comment
Coefficient of thermal expansion	20 °C	2.3e-05 1/K	T451	EN 573-3, EN 485
	20 °C	2.36e-05 1/K	T451	EN 573-3, EN 485
	100 °C	2.3e-05 1/K	T451	EN 573-3, EN 485
	100 °C	2.36e-05 1/K	T451	EN 573-3, EN 485
Melting point		580.0 - 640.0 °C	T451	EN 573-3, EN 485
		580.0 - 650.0 °C	T451	EN 573-3, EN 485
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)	T451	EN 573-3, EN 485
		170.0 - 200.0 W/(m·K)	T451	EN 573-3, EN 485

Electrical

Property	Value	Condition	Related Standards
Electrical conductivity	22000000.0 - 30000000.0 S/m	T451	EN 573-3, EN 485
	23000000.0 - 27000000.0 S/m	T451	EN 573-3, EN 485
Electrical resistivity	3.33e-08 - 4.55e-08 Ω·m	T451	EN 573-3, EN 485
	3.7e-08 - 4.35e-08 Ω·m	T451	EN 573-3, EN 485

Chemical properties

Property	Value	Condition	Related Standards
Chromium	0.04 - 0.35 %	T451	EN 573-3, EN 485
Copper	0.15 - 0.4 %	T451	EN 573-3, EN 485
Iron	0.70 %	T451	EN 573-3, EN 485
Magnesium	0.8 - 1.2 %	T451	EN 573-3, EN 485
Manganese	0.15 %	T451	EN 573-3, EN 485
Silicon	0.4 - 0.8 %	T451	EN 573-3, EN 485
Titanium	0.15 %	T451	EN 573-3, EN 485
Zinc	0.25 %	T451	EN 573-3, EN 485

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 T42: Premium Anodizable Aluminum Alloy for Corrosion-Resistant Applications DIN 1725‑1 Grade 3.3211 T651: High‑Performance Aluminium Alloy for Corrosion‑Resistant Applications

Metal