7005 Aluminum Alloy Plate

7005 is an aluminium wrought alloy used in bicycle frames , due to its relative ease of welding it does not require expensive heat treating - it is however harder to form making manufacture more challenging. It has an Ultimate Tensile Strength of 350 MPa, a Fatigue Strength of 150 MPa and a density of 2.78 g/cm³. It does not need to be precipitation hardened, but can be cooled in air.

7005 aluminum alloy is an American deformed aluminum alloy. The strength of 7005 aluminum alloy is higher than that of 7003 aluminum alloy. It has good welding performance and can be strengthened by heat treatment. 7005 aluminum alloy is an extruded material. It is often used in the manufacture of welded structures that require both high strength and high fracture toughness, such as trusses, rods, and containers of transportation vehicles; large heat exchangers, and cannot be welded. The parts that undergo solid solution treatment; can also be used to make sports equipment such as tennis rackets and softball bats.

Chemical Composition:

Chemical Element	Metric	English	Comments
Aluminum, Al	91 - 94.7 %	91 - 94.7 %	As remainder
Chromium, Cr	0.06 - 0.20 %	0.06 - 0.20 %
Copper, Cu	<= 0.10 %	<= 0.10 %
Iron, Fe	<= 0.40 %	<= 0.40 %
Magnesium, Mg	1.0 - 1.8 %	1.0 - 1.8 %
Manganese, Mn	0.20 - 0.70 %	0.20 - 0.70 %
Other, each	<= 0.05 %	<= 0.05 %
Other, total	<= 0.15 %	<= 0.15 %
Silicon, Si	<= 0.35 %	<= 0.35 %
Titanium, Ti	0.01 - 0.06 %	0.01 - 0.06 %
Zinc, Zn	4.0 - 5.0 %	4.0 - 5.0 %
Zirconium, Zr	0.08 - 0.20 %	0.08 - 0.20 %

Mechanical Properties:

Mechanical Properties	Metric	English	Comments
Hardness, Brinell	94	94	500 kg load with 10 mm ball. Calculated value.
Hardness, Knoop	119	119	Converted from Brinell Hardness Value
Hardness, Rockwell A	39.5	39.5	Converted from Brinell Hardness Value
Hardness, Rockwell B	59	59	Converted from Brinell Hardness Value
Hardness, Vickers	106	106	Converted from Brinell Hardness Value
Tensile Strength, Ultimate	350 MPa	50800 psi
Tensile Strength, Yield	290 MPa	42100 psi
Elongation at Break	13 % @Thickness 1.60 mm	13 % @Thickness 0.0630 in	In 5 cm
Modulus of Elasticity	72.0 GPa	10400 ksi	Average of Tension and Compression. In Al alloys, the compressive modulus is typically 2% greater than the tensile modulus
Poissons Ratio	0.33	0.33	Estimated from trends in similar Al alloys.
Fatigue Strength	150 MPa @# of Cycles 5.00e+8	21800 psi @# of Cycles 5.00e+8
Shear Modulus	26.9 GPa	3900 ksi
Shear Strength	215 MPa	31200 psi

Thermal Properties:

Thermal Properties	Metric	English	Comments
CTE, linear	21.4 µm/m-°C @Temperature -50.0 - 20.0 °C	11.9 µin/in-°F @Temperature -58.0 - 68.0 °F
	23.1 µm/m-°C @Temperature 20.0 - 100 °C	12.8 µin/in-°F @Temperature 68.0 - 212 °F
	23.6 µm/m-°C @Temperature 20.0 - 100 °C	13.1 µin/in-°F @Temperature 68.0 - 212 °F
	24.0 µm/m-°C @Temperature 20.0 - 200 °C	13.3 µin/in-°F @Temperature 68.0 - 392 °F
	25.0 µm/m-°C @Temperature 20.0 - 300 °C	13.9 µin/in-°F @Temperature 68.0 - 572 °F
Specific Heat Capacity	0.875 J/g-°C	0.209 BTU/lb-°F
Thermal Conductivity	137 W/m-K	951 BTU-in/hr-ft²-°F
Melting Point	607 - 643 °C	1120 - 1190 °F
Solidus	607 °C	1120 °F
Liquidus	643 °C	1190 °F

Process Properties:

Processing Properties	Metric	English	Comments
Annealing Temperature	343 °C	650 °F
Solution Temperature	399 °C	750 °F