Aluminum AlSi10Mg
EN AlSi10Mg
AlSi10Mg is the near-eutectic Al-Si-Mg casting composition (EN AC-43000, A360.0, ADC3, ZL104) processed as gas-atomised powder for laser powder bed fusion, where the fine cellular silicon network gives as-built strength above the equivalent casting.
Values for the As Printed condition
AlSi10Mg tempers and conditions
AlSi10Mg is supplied in 7 conditions, soft to hard. As Printed is the default FabDigit quotes; the values on this page are for it.
Compare all 7 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Cast, As-Cast | Conventionally cast (sand or permanent-mould) AlSi10Mg in the as-cast F condition: modest strength, good castability and pressure tightness. | 90 | 180 | 3 | 55 HB | 26 % IACS |
Hot isostatic pressed | Closes gas/lack-of-fusion porosity for fatigue-critical and pressure-tight parts; coarsens the Si network so static strength drops but ductility and fatigue life rise sharply. | 185 | 300 | 14 | 88 HB | 35 % IACS |
Cast, Solution Treated + Under-Aged | Under-aged (T64) cast AlSi10Mg: strength close to T6 with noticeably better ductility and toughness for impact-loaded castings. | 200 | 240 | 4 | 80 HB | 29 % IACS |
~300 °C / 2 h, air cooled | Standard industrial default for dimensional stability: removes build residual stress and anisotropy at the cost of ~25 % strength, gaining ductility and thermal conductivity. | 215 | 345 | 10 | 100 HB | 32 % IACS |
Cast, Solution Treated + Fully Artificially Aged | Sand/permanent-mould AlSi10Mg solution treated near 525-540 °C, quenched and peak aged for maximum strength and hardness at low ductility. | 215 | 260 | 2 | 90 HB | 30 % IACS |
Solution heat treated and artificially aged | Choose for isotropic, thermally stable properties with balanced strength and ductility; spheroidised Si eliminates build-direction anisotropy but distortion during quench must be planned for. | 240 | 340 | 8 | 105 HB | 34 % IACS |
As PrintedDefault as-built L-PBF, no post heat treatment | Highest strength/hardness straight off the plate; use when residual stress and anisotropy are acceptable and parts are small or well supported. | 265 | 460 | 7 | 119 HB | 24 % IACS |
What is AlSi10Mg?
AlSi10Mg is the near-eutectic Al-Si-Mg casting composition (EN AC-43000, A360.0, ADC3, ZL104) processed as gas-atomised powder for laser powder bed fusion, where the fine cellular silicon network gives as-built strength above the equivalent casting. It is the default AM aluminium for brackets, housings and thermal parts, printing to 265 MPa yield, 460 MPa tensile, 7 % elongation, 119 HB and 120 W/m·K. Ductility, a 150 °C service limit and 24 % IACS conductivity are the trade-offs, and the eutectic silicon makes anodised colour dark and uneven; use AlSi7Mg for more ductility or Scalmalloy for higher strength. AlSi10Mg has a density of 2.67 g/cm³ (0.0965 lb/in³), lighter than 78% of aluminum grades. It melts at 557°C (1,035 °F). AlSi10Mg has a yield strength of 265 MPa (38.4 ksi) and a tensile strength of 460 MPa (66.7 ksi) — stronger than 69% of aluminum grades. Elongation at break is 7% and the elastic modulus is 70 GPa (10.2 Msi).
What is AlSi10Mg used for?
- Brackets
- Heat exchangers
- Drone frames
Limitations
- High embodied carbon — 15 kg CO₂/kg, worse than 97% of aluminum grades
- Low electrical conductivity — 24 % IACS, worse than 95% of aluminum grades
- Poor heat conductor — 120 W/m·K (69.3 BTU/hr·ft·°F), worse than 80% of aluminum grades
- Limited formability — 10/100, worse than 80% of aluminum grades
AlSi10Mg properties
Typical room-temperature values for AlSi10Mg-As Printed; bars are the position among aluminum grades.
Physical3
AlSi10Mg has a density of 2.67 g/cm³ (0.0965 lb/in³), lighter than 78% of aluminum grades. It melts at 557°C (1,035 °F).
Mechanical15
AlSi10Mg has a yield strength of 265 MPa (38.4 ksi) and a tensile strength of 460 MPa (66.7 ksi) — stronger than 69% of aluminum grades. Elongation at break is 7% and the elastic modulus is 70 GPa (10.2 Msi).
Thermal6
AlSi10Mg is rated for continuous service to 150°C (302 °F). It conducts heat at 120 W/m·K (69.3 BTU/hr·ft·°F), worse than 80% of aluminum grades. Thermal expansion is 21 µm/m·K (11.7 µin/in·°F).
Electrical3
AlSi10Mg conducts electricity at 24 % IACS, worse than 95% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is good (55/100), worse than 51% of aluminum grades.
Sustainability4
Producing a kilogram of AlSi10Mg takes about 240 MJ of energy and emits 15 kg of CO₂ — more than 98% of aluminum grades. Typical recycled content is 5%.
Manufacturability8
AlSi10Mg's machinability is fair (50/100, worse than 65% of aluminum grades); weldability good (60/100); formability not recommended (10/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the aluminum family
Yield strength against density for every aluminum grade FabDigit runs. AlSi10Mg is highlighted; hover a dot for its name, or open the interactive family chart.
Working with AlSi10Mg
Is AlSi10Mg easy to machine?
Machines like a hypoeutectic Al-Si casting — use polished-flute or PCD/diamond-coated carbide, high speed and low feed, flood coolant; eutectic Si is abrasive and as-built porosity can cause chatter and smeared surfaces.
Can AlSi10Mg be welded?
Weldable by TIG/laser with 4043/AlSi10 filler; keep heat input low and pre-bake parts to avoid porosity from trapped process gas, and re-age after welding since the HAZ softens.
Can AlSi10Mg be formed, bent or molded?
Not cold-formable — geometry is created by the build; design with ≥45° self-supporting angles, 0.4 mm minimum wall, and stress-relieve on the plate before support removal to prevent warping.
Manufacturability
The process limits FabDigit's quote engine applies to AlSi10Mg. Design inside these and the part quotes instantly; outside them it routes to an engineer.
3D printing
| Technologies | DMLS |
|---|---|
| Layer height | 20 – 60 µmdefault 30 µm |
| Minimum wall / feature | 0.5 / 0.3 mm |
| Build envelope | 250 × 250 × 325 mm |
| Supports | Yes |
| Anisotropy | Mild |
| Mandatory post-processing | heat treatment |
AlSi10Mg chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| Sinear-eutectic, drives fluidity and printability | 9 – 11 | 10 |
| MgMg2Si precipitation hardening | 0.2 – 0.45 | 0.35 |
| Fepowder grades usually ≤0.25 | ≤ 0.55 | 0.15 |
| Mn | ≤ 0.45 | 0.05 |
| Ti | ≤ 0.15 | 0.02 |
| Cu | ≤ 0.05 | 0.01 |
| Ni | ≤ 0.05 | 0.01 |
| Zn | ≤ 0.1 | 0.02 |
| Pb | ≤ 0.05 | 0.01 |
| Sn | ≤ 0.05 | 0.01 |
| Opowder oxygen, typical gas-atomised limit | ≤ 0.2 | 0.06 |
| Al | balance |
What surface finishes work on AlSi10Mg?
Bead-blast or tumble to even the as-built roughness (Ra 6–15 µm), machine critical faces, then hard-anodize or chromate-free conversion coat; anodized colour is dark grey and non-uniform because of the silicon.
Surface treatments FabDigit runs on aluminum parts — pick them in the quote configurator or call them out on the drawing. Each links to its datasheet in the surface-finish library (thickness, specs, call-out, material verdicts).
Organic Coating
Metal Finish
Equivalent designations
Standards and trade names that resolve to Aluminum AlSi10Mg in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
How much does AlSi10Mg cost?
AlSi10Mg is a premium-cost aluminum ($$$), cheaper than about 58% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
AlSi10Mg — frequently asked
What is AlSi10Mg used for?
AlSi10Mg is typically used for brackets, heat exchangers and drone frames. In short: standard LPBF aluminum casting.
What is the yield strength of AlSi10Mg?
AlSi10Mg has a typical yield strength of 265 MPa (38.4 ksi) and a tensile strength of 460 MPa (66.7 ksi) — stronger than 69% of aluminum grades. Strength varies by condition: see the 7 listed tempers.
Is AlSi10Mg easy to machine?
Reasonably — machinability is rated fair (50/100, worse than 65% of aluminum grades). Machines like a hypoeutectic Al-Si casting — use polished-flute or PCD/diamond-coated carbide, high speed and low feed, flood coolant; eutectic Si is abrasive and as-built porosity can cause chatter and smeared surfaces.
Can AlSi10Mg be welded?
Yes — weldability is rated good (60/100). Weldable by TIG/laser with 4043/AlSi10 filler; keep heat input low and pre-bake parts to avoid porosity from trapped process gas, and re-age after welding since the HAZ softens.
What surface finishes work on AlSi10Mg?
Bead-blast or tumble to even the as-built roughness (Ra 6–15 µm), machine critical faces, then hard-anodize or chromate-free conversion coat; anodized colour is dark grey and non-uniform because of the silicon.
Can AlSi10Mg be formed, bent or molded?
Not cold-formable — geometry is created by the build; design with ≥45° self-supporting angles, 0.4 mm minimum wall, and stress-relieve on the plate before support removal to prevent warping.
What is the maximum service temperature of AlSi10Mg?
AlSi10Mg is rated for continuous use to about 150°C (302 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between AlSi10Mg As Printed and AlSi10Mg CAST-F?
As Printed is the default condition — highest strength/hardness straight off the plate; use when residual stress and anisotropy are acceptable and parts are small or well supported. CAST-F: conventionally cast (sand or permanent-mould) AlSi10Mg in the as-cast F condition: modest strength, good castability and pressure tightness. Yield strength is 265 MPa in As Printed versus 90 MPa in CAST-F.
How much does AlSi10Mg cost?
AlSi10Mg is a premium-cost aluminum ($$$), cheaper than about 58% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Can FabDigit make parts in AlSi10Mg?
Yes — AlSi10Mg is available for 3D printing with instant online pricing. Upload a STEP file to get a price and a DFM check.
Sources
- EOS Aluminium AlSi10Mg Material Data Sheet — EOS GmbH (2022)
- AlSi10Mg Material Data Sheet for SLM systems — Nikon SLM Solutions (2023)
- EN 1706 — Aluminium and aluminium alloys, castings (EN AC-43000/AlSi10Mg) — CEN (2020)
- ASTM F3318 — Additive Manufacturing of Aluminium Alloy AlSi10Mg by Laser Beam Powder Bed Fusion — ASTM International (2018)
- ASM Handbook Vol. 2 — Properties of Aluminum Alloys (A360/AlSi10Mg) — ASM International (1990)
- Senvol / published L-PBF AlSi10Mg mechanical and fatigue data compilations — various peer-reviewed sources (2023)
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.