3103 (AlMn1, 3.0515, N3, A93103) Aluminum
3103 aluminum is a 3000-series aluminum alloy: the main alloying addition is manganese, and it is formulated for primary forming into wrought products. 3103 is the Aluminum Association (AA) designation for this material. In European standards, it will be given as EN AW-3103. AlMn1 is the EN chemical designation. N3 is the British Standard (BS) designation. And A93103 is the UNS number.
It originally received its standard designation in 1972.
The properties of 3103 aluminum include fifteen common variations. This page shows summary ranges across all of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare 3103 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
Brinell Hardness
27 to 62
Elastic (Young's, Tensile) Modulus
70 GPa 10 x 106 psi
Elongation at Break
1.1 to 28 %
Fatigue Strength
38 to 83 MPa 5.6 to 12 x 103 psi
Poisson's Ratio
0.33
Shear Modulus
26 GPa 3.8 x 106 psi
Shear Strength
68 to 130 MPa 9.8 to 18 x 103 psi
Tensile Strength: Ultimate (UTS)
100 to 220 MPa 15 to 32 x 103 psi
Tensile Strength: Yield (Proof)
39 to 200 MPa 5.7 to 29 x 103 psi
Thermal Properties
Latent Heat of Fusion
400 J/g
Maximum Temperature: Mechanical
190 °C 380 °F
Melting Completion (Liquidus)
660 °C 1210 °F
Melting Onset (Solidus)
640 °C 1180 °F
Specific Heat Capacity
900 J/kg-K 0.21 BTU/lb-°F
Thermal Conductivity
160 W/m-K 93 BTU/h-ft-°F
Thermal Expansion
23 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
42 % IACS
Electrical Conductivity: Equal Weight (Specific)
140 % IACS
Otherwise Unclassified Properties
Base Metal Price
9.5 % relative
Density
2.8 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
1180 L/kg 140 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
2.4 to 24 MJ/m3
Resilience: Unit (Modulus of Resilience)
11 to 280 kJ/m3
Stiffness to Weight: Axial
14 points
Stiffness to Weight: Bending
50 points
Strength to Weight: Axial
10 to 22 points
Strength to Weight: Bending
18 to 30 points
Thermal Diffusivity
64 mm2/s
Thermal Shock Resistance
4.6 to 9.9 points
Alloy Composition
Among wrought aluminum alloys, the composition of 3103 aluminum is notable for containing a comparatively high amount of manganese (Mn) and including zirconium (Zr). Manganese is used to improve strength without a proportional reduction in ductility. It also improves workability by controlling the grain structure of the alloy. Zirconium is used to increase an alloy's recrystallization temperature, which increases the temperature at which the alloy can be used without permanent loss of mechanical properties.
| Al | 96.3 to 99.1 | |
| Mn | 0.9 to 1.5 | |
| Fe | 0 to 0.7 | |
| Si | 0 to 0.5 | |
| Mg | 0 to 0.3 | |
| Zn | 0 to 0.2 | |
| Cr | 0 to 0.1 | |
| Ti | 0 to 0.1 | |
| Zr | 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
Handbook of Aluminum Bonding Technology and Data, J. D. Minford, 1993
EN 754-2: Aluminium and aluminium alloys. Cold drawn rod/bar and tube. Mechanical properties
EN 755-2: Aluminium and aluminium alloys. Extruded rod/bar, tube and profiles. Mechanical properties
EN 485-2: Aluminium and aluminium alloys. Sheet, strip and plate. Mechanical properties
ASM Specialty Handbook: Aluminum and Aluminum Alloys, J. R. Davis (editor), 1993
ISO 6361-2: Wrought aluminium and aluminium alloys - Sheets, strips and plates - Part 2: Mechanical properties
EN 573-3: Aluminium and aluminium alloys. Chemical composition and form of wrought products. Chemical composition and form of products