Aluminum AlSi10Mg vs EN AC-21000
Aluminum · grade comparison
Aluminum AlSi10Mg and EN AC-21000 are both aluminum grades. AlSi10Mg is the stronger of the two: yield strength 265 MPa (38.4 ksi) against 210 MPa (30.5 ksi) for EN AC-21000, about 26% more; tensile strength follows at 460 MPa (66.7 ksi) vs 320 MPa (46.4 ksi). AlSi10Mg is harder — 119 HB against 92 HB for EN AC-21000 — which matters for wear surfaces and threads. AlSi10Mg is lighter (2.67 g/cm³ vs 2.8 g/cm³ for EN AC-21000) and EN AC-21000 conducts electricity better (30 % IACS vs 24 % IACS). On the shop floor, EN AC-21000 machines more easily (very good vs fair) and AlSi10Mg welds better (good vs poor).
AlSi10MgChoose it when strength drives the design, or when surface hardness matters.
EN AC-21000Choose it when the part is machined in volume.
AlSi10Mg vs EN AC-21000: 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
Bulk Modulus
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: Shear Modulus 26.5 GPa3.8 Msi · Poisson's Ratio 0.33 · Elongation at Break 7%
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
Latent Heat of Fusion
Same in both: Thermal Expansion (CTE, 20–100 °C) 21 µm/m·K11.7 µin/in·°F · 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
Castability
Brazeability / Solderability
Same in both: Formability (cold) 10 / 100 · Polishability 55 / 100
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Embodied Water
Typical Recycled Content
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 | AlSi10Mg | EN AC-21000 |
|---|---|---|
| 3D printing | Yes | — |
| Default condition | As Printed | — |
| Relative cost | $$$ Premium | $$$ Premium |
| Min. machined wall | — | — |
| Best machined surface | — | — |
| Anodized (Aluminum AM) | Yes | — |
| Plated (Metal AM) | Yes | — |
They share 4 finishes: Electroless Nickel (EN), Epoxy Coating, Gold Plating, Silver Plating.
AlSi10Mg vs EN AC-21000 — frequently asked
Is AlSi10Mg stronger than EN AC-21000?
Yes. AlSi10Mg has a typical yield strength of 265 MPa (38.4 ksi) against 210 MPa (30.5 ksi) for EN AC-21000 — about 26% more. Tensile strength is 460 MPa (66.7 ksi) vs 320 MPa (46.4 ksi).
Which is cheaper, AlSi10Mg or EN AC-21000?
Both sit in the same relative cost tier ($$$, premium); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which is easier to machine, AlSi10Mg or EN AC-21000?
EN AC-21000. Its machinability rates very good (78/100) against fair (50/100) for AlSi10Mg; for welding the order is AlSi10Mg first (good, 60/100) then EN AC-21000 (poor, 25/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in AlSi10Mg and EN AC-21000 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.