Metallurgical specifications of Tubes of Aluminum alloy 6063

General Characteristics
The 6063 alloy is a medium strength alloy commonly referred to as an architectural alloy particularly for window frames, door frames and roofs. It is normally used in intricate extrusions. It has a good surface finish, high corrosion resistance, is readily suited to welding and can be easily anodized. Most commonly available as T6 temper and in the T4 condition it has good formability.
Typical Chemical Composition

Other

Weight % Si Fe Cu Mn Mg Cr Zn Ti Each Total Aluminum

minimum 0.20 — — — 0.45 — — — — — Remainder

maximum 0.60 0.35 0.10 0.1 0.90 0.10 0.10 0.10 0.05 0.15

	Other
minimum	0.20	—	—	—	0.45	—	—	—	—	—	Remainder
maximum	0.60	0.35	0.10	0.1	0.90	0.10	0.10	0.10	0.05	0.15

Characteristics		English	Metric
Nominal density (68°F/20°C)		0.097 lbs/in³	2.68 mg/m³
Melting range		1140°F-1210°F	616°C-654°C
Specific heat (212 °F/100°C)		0.215 BTU/lb – °F	900 J/KG- °K
Coefficient of thermal expansion	Linear 68°F – 212°F 20°C – 100°C	12.1 micro in/in- °F	21.8 micro m/m- °K
Thermal conductivity (68°F/20°C)	0 temper	126 BTU/ft- hr – °F	218 W/m – °K
	T5	121 BTU/ft- hr – °F	209 W/m – °K
	T6	116 BTU/ft- hr – °F	200 W/m – °K
Electrical conductivity (68°F/20°C)	Equal Volume	0 temper	58% IACS
		T5	55% IACS
		T6	53% IACS

Temper	Tensile (0.500″ Dia. Specimen)					Hardness	Shear		Fatigue		Modulus
	Ultimate		Yield		Elongation/4D	Brinell 500 kg 10 mm	Ultimate shearing strength		Endurance limit-R.R.Moore type		Modulus of elasticity
	KSI	MPa	KSI	MPa	%		KSI	MPa	KSI	MPa	KSIx10³	Gpa
O	13	90	7	50	18	25	10	70	8	55	10.0	69
T4	25	170	13	90	22	—	—	—	—	—	10.0	69
T5	27	185	21	145	12	60	17	115	10	70	10.0	69
T6	35	240	31	215	12	73	22	150	10	70	10.0	69

Specifications
- ASTM – B210, B221, B241, B345, B429, B483, B491
- ASME – SB221, SB241
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Aluminum Alloy 6063