EN 755-2· Europe

6063-T66

Highest-strength 6063 temper: 200 MPa proof and 245 MPa tensile up to 10 mm.

Wall thicknessmm

0.2 % proof strength Rp0.2: ≥ 180MPa
Corroborated10–25 mm
Tensile strength Rm: ≥ 225MPa
Corroborated10–25 mm
Elongation after fracture A: ≥ 8%
Corroborated10–25 mm · A (L₀ = 5.65√S₀)
Characteristic proof strength fo: 180MPa
From the standard10–25 mm
Characteristic ultimate strength fu: 225MPa
From the standard10–25 mm
HAZ proof strength fo,haz: 75MPa
From the standard10–25 mm
HAZ ultimate strength fu,haz: 130MPa
From the standard10–25 mm

All values

Identity and composition 8
Mechanical 6
Design values 8
Physical not yet
Thermal not yet
Fire not yet
Chemical and durability not yet

Mechanical

Strength

0.2 % proof strength Rp0.2

Minimum 0.2 % proof strength guaranteed by the product standard.

Condition	Value	Evidence
	≥ 200MPa	Corroborated
	≥ 180MPa	Corroborated

Tensile strength Rm

Ultimate tensile strength. Product standards give a range or a minimum.

Condition	Value	Evidence
	≥ 245MPa	Corroborated
	≥ 225MPa	Corroborated

Ductility

Elongation after fracture A

Minimum elongation; depends on gauge length and test direction.

Condition	Value	Evidence
	≥ 8%	Corroborated
	≥ 8%	Corroborated

Design values

Characteristic proof strength fo

fo for design to Eurocode 9 (before partial factors).

Condition	Value	Evidence
	200MPa	From the standard
	180MPa	From the standard

Characteristic ultimate strength fu

fu for design to Eurocode 9.

Condition	Value	Evidence
	245MPa	From the standard
	225MPa	From the standard

HAZ proof strength fo,haz

0.2 % proof strength in the heat-affected zone of a weld (Eurocode 9).

Condition	Value	Evidence
	75MPa	From the standard
	75MPa	From the standard

HAZ ultimate strength fu,haz

Ultimate strength in the heat-affected zone of a weld (Eurocode 9).

Condition	Value	Evidence
	130MPa	From the standard
	130MPa	From the standard

Chemical composition

Show on the periodic table

EN AW-6063, % by mass (EN 573-3, per Hydro)

Element	Applies to	Max %	Evidence
Si	all thicknesses	0.60	Single source
Fe	all thicknesses	0.35	Single source
Cu	all thicknesses	0.10	Single source
Mn	all thicknesses	0.10	Single source
Mg	all thicknesses	0.90	Single source
Cr	all thicknesses	0.10	Single source
Zn	all thicknesses	0.10	Single source
Ti	all thicknesses	0.10	Single source

Sources here are public pages that reproduce EN 755-2. For design and acceptance, the standard edition named in your specification and the inspection certificate (EN 10204 3.1) of the delivered product take precedence. Design factors are recommended values; your National Annex may set others.