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 ElementMetricEnglishComments
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 PropertiesMetricEnglishComments
Hardness, Brinell 9494500 kg load with 10 mm ball. Calculated value.
Hardness, Knoop 119119Converted from Brinell Hardness Value
Hardness, Rockwell A 39.539.5Converted from Brinell Hardness Value
Hardness, Rockwell B 5959Converted from Brinell Hardness Value
Hardness, Vickers 106106Converted from Brinell Hardness Value
Tensile Strength, Ultimate 350 MPa50800 psi 
Tensile Strength, Yield 290 MPa42100 psi 
Elongation at Break 13 %
@Thickness 1.60 mm
13 %
@Thickness 0.0630 in
In 5 cm
Modulus of Elasticity 72.0 GPa10400 ksiAverage of Tension and Compression. In Al alloys, the compressive modulus is typically 2% greater than the tensile modulus
Poissons Ratio 0.330.33Estimated 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 GPa3900 ksi 
Shear Strength 215 MPa31200 psi 

 

Thermal Properties:

 

Thermal PropertiesMetricEnglishComments
CTE, linear21.4 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-°C0.209 BTU/lb-°F 
Thermal Conductivity 137 W/m-K951 BTU-in/hr-ft²-°F 
Melting Point 607 - 643 °C1120 - 1190 °F 
Solidus 607 °C1120 °F 
Liquidus 643 °C1190 °F 

 

Process Properties:

 

Processing PropertiesMetricEnglishComments
Annealing Temperature 343 °C650 °F 
Solution Temperature 399 °C750 °F 

 

 

 

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