7021 (7021-T6, AlZn5.5Mg1.5) Aluminum
Wrought Aluminum Alloys
Property Overview
Density2.9g/cm³
Elastic Modulus69GPa
Tensile Strength460MPa
Yield Strength390MPa
Brinell HardnessUnknown
Maximum Service Temperature200°C
Chemical Composition
CR
0 to 0.050%
MN
0 to 0.1%
SI
0 to 0.25%
CU
0 to 0.25%
TI
0 to 0.1%
AL
90.7 to 93.7%
MG
1.2 to 1.8%
RES.
Residuals res. | | 0 to 0.15%
RESIDUALS RES.
0 to 0.15%
ZN
5.0 to 6.0%
ZR
0.080 to 0.18%
FE
0 to 0.4%
Mechanical
Elastic (Young's, Tensile) Modulus
69 GPa
Elongation at Break
9.4 %
Fatigue Strength
150 MPa
Poisson's Ratio
0.32
Shear Modulus
26 GPa
Shear Strength
270 MPa
Tensile Strength: Ultimate (UTS)
460 MPa
Tensile Strength: Yield (Proof)
390 MPa
Physical
Density
2.9 g/cm 3
Thermal
Latent Heat of Fusion
380 J/g
Maximum Temperature: Mechanical
200 °C
Melting Completion (Liquidus)
630 °C
Melting Onset (Solidus)
510 °C
Specific Heat Capacity
870 J/kg-K
Thermal Conductivity
150 W/m-K
Thermal Diffusivity
59 mm 2 /s
Thermal Expansion
24 µm/m-K
Thermal Shock Resistance
20 points
Electrical
Electrical Conductivity: Equal Volume
38 % IACS
Electrical Conductivity: Equal Weight (Specific)
120 % IACS
Calculated
Resilience: Ultimate (Unit Rupture Work)
41 MJ/m 3
Resilience: Unit (Modulus of Resilience)
1110 kJ/m 3
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
47 points
Strength to Weight: Axial
44 points
Strength to Weight: Bending
45 points
Environmental
Base Metal Price
9.5 % relative
Embodied Carbon
8.3 kg CO 2 /kg material
Embodied Energy
150 MJ/kg
Embodied Energy
150 MJ/kg 65 x 10 3 BTU/lb
Embodied Water
1140 L/kg
Embodied Water
1140 L/kg 140 gal/lb
Registered Designations & Aliases
7021 (7021-T6, AlZn5.5Mg1.5) Aluminum7021-T6A97021AlZn5.5Mg1.5EN AW-7021
Standards
EN 485-2 EN 485-2: Aluminium and aluminium alloys. Sheet, strip and plate. Mechanical properties
EN 573-3 EN 573-3: Aluminium and aluminium alloys. Chemical composition and form of wrought products. Chemical composition and form of products
EN 755-2 EN 755-2: Aluminium and aluminium alloys. Extruded rod/bar, tube and profiles. Mechanical properties
ISO 6361-2 ISO 6361-2: Wrought aluminium and aluminium alloys - Sheets, strips and plates - Part 2: Mechanical properties