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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.

Aluminum (Al) 96.3 to 99.1
Manganese (Mn) 0.9 to 1.5
Iron (Fe) 0 to 0.7
Silicon (Si) 0 to 0.5
Magnesium (Mg) 0 to 0.3
Zinc (Zn) 0 to 0.2
Chromium (Cr) 0 to 0.1
Titanium (Ti) 0 to 0.1
Zirconium (Zr) 0 to 0.1
Copper (Cu) 0 to 0.1
Residuals 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