Aluminum 2024 vs Alca 5
Aluminum · grade comparison
Aluminum 2024 and Alca 5 are both aluminum grades. 2024 is the stronger of the two: yield strength 345 MPa (50 ksi) against 83 MPa (12 ksi) for Alca 5, about 4.2 times as much; tensile strength follows at 483 MPa (70.1 ksi) vs 152 MPa (22 ksi). 2024 is the more ductile: elongation 18% versus 2% for Alca 5, and 2024 is harder (120 HB vs 65 HB). Alca 5 conducts heat better (140 W/m·K vs 121 W/m·K). On the shop floor, Alca 5 machines more easily (excellent vs very good), Alca 5 welds better (fair vs poor), and Alca 5 sits in a lower cost tier (standard, $$) than 2024 (premium, $$$).
2024Choose it when strength drives the design, or when the part is bent, formed or impact-loaded.
Alca 5Choose it when the part is machined in volume, or when it will be welded.
2024 vs Alca 5: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all aluminum grades in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
How to read these bars
- One bar per material. A full bar is the highest value among all aluminum grades in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Elastic (Young's) Modulus
Shear Modulus
Bulk Modulus
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: Poisson's Ratio 0.33
Physical
Density and transition temperatures.
Density
Melting Point (Solidus)
Liquidus Temperature
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Specific Heat Capacity
Thermal Expansion (CTE, 20–100 °C)
Latent Heat of Fusion
Same in both: Max Service Temperature (continuous) 150°C302 °F · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Galvanic Potential (seawater, vs SCE)
Corrosion Resistance
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Castability
Brazeability / Solderability
Polishability
Sustainability
Primary-production footprint per kilogram.
Embodied Carbon (primary production)
Typical Recycled Content
Same in both: Embodied Energy (primary production) 200 MJ/kg85,985 BTU/lb · Embodied Water 1,100 L/kg132 gal/lb
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Specific Stiffness (E / density)
Modulus of Resilience
Thermal Diffusivity
Thermal Shock Resistance Index
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.
Manufacturing and finishing
| Capability | 2024 | Alca 5 |
|---|---|---|
| Sheet metal | Yes | — |
| Default condition | T3 | — |
| Relative cost | $$$ Premium | $$ Standard |
| Min. machined wall | 0.8 mm | 0.5 mm |
| Best machined surface | Ra 0.8 µm | Ra 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.
2024 vs Alca 5 — frequently asked
Is 2024 stronger than Alca 5?
Yes. 2024 has a typical yield strength of 345 MPa (50 ksi) against 83 MPa (12 ksi) for Alca 5 — about 4.2 times as much. Tensile strength is 483 MPa (70.1 ksi) vs 152 MPa (22 ksi).
Which is cheaper, 2024 or Alca 5?
Alca 5 is the lower-cost material: it sits in the standard tier ($$) while 2024 is premium ($$$). Part price depends far more on geometry, tolerance and quantity than on raw stock — upload a CAD file for a live quote.
Which is easier to machine, 2024 or Alca 5?
Alca 5. Its machinability rates excellent (88/100) against very good (72/100) for 2024; for welding the order is Alca 5 first (fair, 45/100) then 2024 (poor, 20/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in 2024 and Alca 5 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.