3102 (AlMn0.2, A93102) Aluminum
3102 aluminum is a 3000-series aluminum alloy: the main alloying addition is manganese, and it is formulated for primary forming into wrought products. 3102 is the Aluminum Association (AA) designation for this material. In European standards, it will be given as EN AW-3102. A93102 is the UNS number. Additionally, the EN chemical designation is AlMn0,2.
It originally received its standard designation in 1972. This material is well established: the Further Reading section below cites a number of published standards, and that list is not necessarily exhaustive.
It can have the lowest tensile strength among the 3000-series alloys in the database.
The properties of 3102 aluminum include two common variations. This page shows summary ranges across both of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare 3102 aluminum to: 3000-series alloys (top), all aluminum alloys (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.
Mechanical Properties
Elastic (Young's, Tensile) Modulus
69 GPa 10 x 106 psi
Elongation at Break
23 to 28 %
Fatigue Strength
31 to 34 MPa 4.5 to 5.0 x 103 psi
Poisson's Ratio
0.33
Shear Modulus
26 GPa 3.8 x 106 psi
Shear Strength
58 to 65 MPa 8.5 to 9.4 x 103 psi
Tensile Strength: Ultimate (UTS)
92 to 100 MPa 13 to 15 x 103 psi
Tensile Strength: Yield (Proof)
28 to 34 MPa 4.1 to 4.9 x 103 psi
Thermal Properties
Latent Heat of Fusion
400 J/g
Maximum Temperature: Mechanical
180 °C 360 °F
Melting Completion (Liquidus)
640 °C 1190 °F
Melting Onset (Solidus)
640 °C 1180 °F
Specific Heat Capacity
900 J/kg-K 0.21 BTU/lb-°F
Thermal Conductivity
230 W/m-K 130 BTU/h-ft-°F
Thermal Expansion
23 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
56 % IACS
Electrical Conductivity: Equal Weight (Specific)
190 % IACS
Otherwise Unclassified Properties
Base Metal Price
9.0 % relative
Density
2.7 g/cm3 170 lb/ft3
Embodied Carbon
8.2 kg CO2/kg material
Embodied Energy
150 MJ/kg 66 x 103 BTU/lb
Embodied Water
1190 L/kg 140 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
16 to 22 MJ/m3
Resilience: Unit (Modulus of Resilience)
5.8 to 8.3 kJ/m3
Stiffness to Weight: Axial
14 points
Stiffness to Weight: Bending
50 points
Strength to Weight: Axial
9.4 to 10 points
Strength to Weight: Bending
17 to 18 points
Thermal Diffusivity
92 mm2/s
Thermal Shock Resistance
4.1 to 4.4 points
Alloy Composition
Among wrought aluminum alloys, the composition of 3102 aluminum is notable for containing comparatively high amounts of iron (Fe) and manganese (Mn). Most of the time, iron is an impurity in aluminum alloys. However, it may be added in quantity to improve strength (particularly at high temperatures) without much impact on electrical properties. Manganese is used to improve strength without a proportional reduction in ductility. It also improves workability by controlling the grain structure of the alloy.
| Al | 97.9 to 99.95 | |
| Fe | 0 to 0.7 | |
| Mn | 0.050 to 0.4 | |
| Si | 0 to 0.4 | |
| Zn | 0 to 0.3 | |
| Ti | 0 to 0.1 | |
| Cu | 0 to 0.1 | |
| res. | 0 to 0.15 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Similar Alloys
Further Reading
ASTM B491: Standard Specification for Aluminum and Aluminum-Alloy Extruded Round Tubes for General-Purpose Applications
ASTM B483: Standard Specification for Aluminum and Aluminum-Alloy Drawn Tube and Pipe for General Purpose Applications
ASTM B210: Standard Specification for Aluminum and Aluminum-Alloy Drawn Seamless Tubes
ASTM B221: Standard Specification for Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and Tubes
Handbook of Aluminum vol. 2: Alloy Production and Materials Manufacturing, George Totten and D. Scott MacKenzie (editors), 2003
Aluminum: Properties and Physical Metallurgy, John E. Hatch (editor), 1984
EN 755-2: Aluminium and aluminium alloys. Extruded rod/bar, tube and profiles. Mechanical properties
ASM Specialty Handbook: Aluminum and Aluminum Alloys, J. R. Davis (editor), 1993
EN 573-3: Aluminium and aluminium alloys. Chemical composition and form of wrought products. Chemical composition and form of products