851.0-T5 Cast Aluminum
851.0-T5 aluminum is 851.0 aluminum in the T5 temper. To achieve this temper, the metal is artificially aged until it meets standard mechanical property requirements. The graph bars on the material properties cards below compare 851.0-T5 aluminum to: ANSI/AA cast aluminums (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
45
Elastic (Young's, Tensile) Modulus
69 GPa 10 x 106 psi
Elongation at Break
3.9 %
Fatigue Strength
62 MPa 9.0 x 103 psi
Poisson's Ratio
0.33
Shear Modulus
26 GPa 3.8 x 106 psi
Shear Strength
96 MPa 14 x 103 psi
Tensile Strength: Ultimate (UTS)
130 MPa 19 x 103 psi
Tensile Strength: Yield (Proof)
76 MPa 11 x 103 psi
Thermal Properties
Latent Heat of Fusion
410 J/g
Maximum Temperature: Mechanical
180 °C 350 °F
Melting Completion (Liquidus)
630 °C 1170 °F
Melting Onset (Solidus)
360 °C 680 °F
Solidification (Pattern Maker's) Shrinkage
1.3 %
Specific Heat Capacity
850 J/kg-K 0.2 BTU/lb-°F
Thermal Conductivity
180 W/m-K 100 BTU/h-ft-°F
Thermal Expansion
23 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
46 % IACS
Electrical Conductivity: Equal Weight (Specific)
140 % IACS
Otherwise Unclassified Properties
Base Metal Price
14 % relative
Density
3.1 g/cm3 190 lb/ft3
Embodied Carbon
8.4 kg CO2/kg material
Embodied Energy
160 MJ/kg 67 x 103 BTU/lb
Embodied Water
1140 L/kg 140 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
4.5 MJ/m3
Resilience: Unit (Modulus of Resilience)
42 kJ/m3
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
45 points
Strength to Weight: Axial
12 points
Strength to Weight: Bending
19 points
Thermal Diffusivity
69 mm2/s
Thermal Shock Resistance
6.1 points
Alloy Composition
| Al | 86.6 to 91.5 | |
| Sn | 5.5 to 7.0 | |
| Si | 2.0 to 3.0 | |
| Cu | 0.7 to 1.3 | |
| Ni | 0.3 to 0.7 | |
| Fe | 0 to 0.7 | |
| Ti | 0 to 0.2 | |
| Mn | 0 to 0.1 | |
| Mg | 0 to 0.1 | |
| res. | 0 to 0.3 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Further Reading
ASTM B618: Standard Specification for Aluminum-Alloy Investment Castings
ASTM B108: Standard Specification for Aluminum-Alloy Permanent Mold Castings
ASTM B26: Standard Specification for Aluminum-Alloy Sand Castings
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