FabDigit

2017 vs 2024 and 2 more: properties

201720242011Alca 5

Mechanical

Strength, stiffness, ductility and hardness at room temperature.

Elastic (Young's) Modulus

72.4 GPa10.5 Msi
73.1 GPa10.6 Msi
70 GPa10.2 Msi
70 GPa10.2 Msi

Shear Modulus

27 GPa3.9 Msi
28 GPa4.1 Msi
26 GPa3.8 Msi
26 GPa3.8 Msi

Bulk Modulus

75 GPa10.9 Msi
73 GPa10.6 Msi
69 GPa10 Msi
69 GPa10 Msi

Tensile Strength (Ultimate)

427 MPa61.9 ksi
483 MPa70.1 ksi
379 MPa55 ksi
152 MPa22 ksi

Yield Strength (0.2% offset)

276 MPa40 ksi
345 MPa50 ksi
296 MPa42.9 ksi
83 MPa12 ksi

Elongation at Break

22%
18%
15%
2%

Compressive Strength

276 MPa40 ksi
350 MPa50.8 ksi
300 MPa43.5 ksi
85 MPa12.3 ksi

Shear Strength

260 MPa37.7 ksi
283 MPa41 ksi
221 MPa32.1 ksi
95 MPa13.8 ksi

Fatigue Strength (Endurance Limit)

124 MPa18 ksi
138 MPa20 ksi
124 MPa18 ksi
55 MPa8 ksi

Fracture Toughness (K_IC)

30 MPa·√m27.3 ksi·√in
37 MPa·√m33.7 ksi·√in

Hardness, Brinell

105 HB
120 HB
95 HB
65 HB

Hardness, Rockwell B

65 HRB
75 HRB

Hardness, Vickers

115 HV
137 HV

Same in both: Poisson's Ratio 0.33

Physical

Density and transition temperatures.

Density

2.79 g/cm³0.1 lb/in³
2.78 g/cm³0.1 lb/in³
2.83 g/cm³0.1 lb/in³
2.71 g/cm³0.1 lb/in³

Melting Point (Solidus)

513°C955 °F
502°C936 °F
541°C1,006 °F
575°C1,067 °F

Liquidus Temperature

641°C1,186 °F
638°C1,180 °F
643°C1,189 °F
640°C1,184 °F

Thermal

How each material carries heat and how hot it can run.

Thermal Conductivity

134 W/m·K77.4 BTU/hr·ft·°F
121 W/m·K69.9 BTU/hr·ft·°F
152 W/m·K87.8 BTU/hr·ft·°F
140 W/m·K80.9 BTU/hr·ft·°F

Specific Heat Capacity

873 J/kg·K0.21 BTU/lb·°F
875 J/kg·K0.21 BTU/lb·°F
864 J/kg·K0.21 BTU/lb·°F
900 J/kg·K0.21 BTU/lb·°F

Thermal Expansion (CTE, 20–100 °C)

23.6 µm/m·K13.1 µin/in·°F
22.9 µm/m·K12.7 µin/in·°F
22.9 µm/m·K12.7 µin/in·°F
23.6 µm/m·K13.1 µin/in·°F

Latent Heat of Fusion

390 J/g168 BTU/lb
390 J/g168 BTU/lb
390 J/g168 BTU/lb
397 J/g171 BTU/lb

Max Service Temperature (continuous)

120°C248 °F
150°C302 °F
120°C248 °F
150°C302 °F

Same in both: Min Service Temperature -196°C-321 °F

Electrical

Conductivity and insulation.

Electrical Conductivity

34 % IACS
30 % IACS
39 % IACS
38 % IACS

Electrical Resistivity

5.07×10⁻⁸ Ω·m2 µΩ·in
5.75×10⁻⁸ Ω·m2.26 µΩ·in
4.42×10⁻⁸ Ω·m1.74 µΩ·in
4.5×10⁻⁸ Ω·m1.77 µΩ·in

Chemical & Environmental

Corrosion and environmental resistance (0–100 scores).

Galvanic Potential (seawater, vs SCE)

-0.69 V
-0.69 V
-0.69 V
-0.85 V

Corrosion Resistance

33 / 100
32 / 100
25 / 100
55 / 100

Manufacturability

FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.

Machinability

78 / 100
72 / 100
100 / 100
88 / 100

Machinability Rating (AISI 1212 = 100 %)

70%
70%
300%
190%

Weldability

20 / 100
20 / 100
10 / 100
45 / 100

Formability (cold)

45 / 100
40 / 100
25 / 100
10 / 100

Castability

25 / 100
10 / 100
85 / 100

Brazeability / Solderability

15 / 100
15 / 100
10 / 100
25 / 100

Polishability

55 / 100
55 / 100
55 / 100
35 / 100

Sustainability

Primary-production footprint per kilogram.

Embodied Carbon (primary production)

12 kg CO₂/kg
12.5 kg CO₂/kg
12.5 kg CO₂/kg
12 kg CO₂/kg

Embodied Water

1,200 L/kg144 gal/lb
1,100 L/kg132 gal/lb
1,100 L/kg132 gal/lb
1,100 L/kg132 gal/lb

Typical Recycled Content

30%
10%
20%
60%

Same in both: Embodied Energy (primary production) 200 MJ/kg85,985 BTU/lb

Common Calculations

Ratios derived from the values above.

Specific Strength (UTS / density)

153 kN·m/kg
174 kN·m/kg
134 kN·m/kg
56 kN·m/kg

Specific Stiffness (E / density)

25.9 MN·m/kg
26.3 MN·m/kg
24.7 MN·m/kg
25.8 MN·m/kg

Modulus of Resilience

526 kJ/m³
814 kJ/m³
626 kJ/m³
49 kJ/m³

Thermal Diffusivity

55 mm²/s
49.7 mm²/s
62.2 mm²/s
57.4 mm²/s

Thermal Shock Resistance Index

33
35
36
13

Strength versus weight

Yield strength against density for every aluminum grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.

20501002005002.22.42.62.83Density (g/cm³)Yield strength (MPa) — log scale20172011Alca 52024

Manufacturing and finishing

Capability201720242011Alca 5
Sheet metalYesYesYes
Default conditionT3
Relative cost$$$ Premium$$$ Premium$$$ Premium$$ Standard
Min. machined wall0.8 mm0.8 mm0.5 mm0.5 mm
Best machined surfaceRa 0.8 µmRa 0.8 µmRa 0.8 µmRa 0.8 µm

Both are offered for CNC machining. Both take the same 16 finishes: Anodizing Type II, Cerakote, Chem Film (Alodine), DLC, E-Coating, Electroless Nickel (EN), Electropolishing, Epoxy Coating, Gold Plating, Hard Anodize Type III w/ PTFE, Hard Anodizing Type III, Nickel Plating and 4 more.

Ready to make it?

Upload a CAD file and FabDigit prices the part in 2017 and 2024 side by side — material, machining time, tolerance and finish in one quote. Certified material data ships with the order on request.

Typical handbook values for the conditions named above, normalised for comparison. Hardness on non-Brinell scales is converted approximately for charting only. Request certified data with your order for design-critical properties.