Aluminum AC2A vs AC8C
Aluminum · grade comparison
Aluminum AC2A and AC8C are both aluminum grades. AC8C is the stronger of the two: yield strength 250 MPa (36.3 ksi) against 170 MPa (24.7 ksi) for AC2A, about 47% more; tensile strength follows at 285 MPa (41.3 ksi) vs 250 MPa (36.3 ksi). In exchange, AC2A is the more ductile: elongation 2% versus 0.8% for AC8C, and AC8C is harder (110 HB vs 85 HB). AC8C is stiffer (80 GPa vs 74 GPa) and AC8C runs hotter in service (200°C vs 175°C continuous). On the shop floor, AC2A machines more easily (very good vs good).
AC2AChoose it when the part is bent, formed or impact-loaded, or when the part is machined in volume.
AC8CChoose it when strength drives the design, or when the part sees heat.
AC2A vs AC8C: 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
Shear Strength
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Compressive Strength
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.
Specific Heat Capacity
Thermal Expansion (CTE, 20–100 °C)
Max Service Temperature (continuous)
Min Service Temperature
Same in both: Thermal Conductivity 110 W/m·K63.6 BTU/hr·ft·°F · Latent Heat of Fusion 389 J/g167 BTU/lb
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Galvanic Potential (seawater, vs SCE)
Same in both: Corrosion Resistance 42 / 100
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)
Embodied Water
Typical Recycled Content
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)
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 | AC2A | AC8C |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$ Standard | $$ Standard |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Both take the same 4 finishes: Electroless Nickel (EN), Epoxy Coating, Gold Plating, Silver Plating.
AC2A vs AC8C — frequently asked
Is AC8C stronger than AC2A?
Yes. AC8C has a typical yield strength of 250 MPa (36.3 ksi) against 170 MPa (24.7 ksi) for AC2A — about 47% more. Tensile strength is 285 MPa (41.3 ksi) vs 250 MPa (36.3 ksi).
Which is cheaper, AC2A or AC8C?
Both sit in the same relative cost tier ($$, standard); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which is easier to machine, AC2A or AC8C?
AC2A. Its machinability rates very good (72/100) against good (60/100) for AC8C; for welding the order is AC2A first (fair, 35/100) then AC8C (poor, 30/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in AC2A and AC8C 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.