AlSi10Mg powder is an aluminum-silicon-magnesium feedstock for LPBF. For a purchase, establish the exact chemistry, measured particle-size distribution and lot evidence, then connect that powder to the machine and final-part requirements. The alloy name alone does not establish printability, strength or thermal performance for a particular build.
Use the AlSi10Mg product page for candidate supply specifications and quotation. This guide covers powder acceptance; the separate housings and brackets guide covers component-level decisions.
LPBF aluminum powder: why AlSi10Mg is the usual starting point
For laser powder bed fusion, most aluminum projects start with AlSi10Mg because it is an Al-Si casting-type alloy whose silicon content reduces hot cracking sensitivity compared with many wrought aluminum alloys, and it has a dedicated LPBF finished-part specification, ASTM F3318-18. Choose another aluminum powder only when the drawing names one or the part needs a property AlSi10Mg cannot reach on the agreed route.
| Aluminum powder question | AlSi10Mg answer | When to look elsewhere |
|---|---|---|
| Is there an LPBF specification? | Yes, ASTM F3318 for LPBF parts | Another alloy may need a project-specific basis |
| Which PSD cut for LPBF? | 20–63 µm or 15–53 µm, matched to layer thickness and recoater | 45–106 µm is a coarser cut for other routes; confirm process fit |
| Strength after heat treatment? | Datasheet test bars ≥280 MPa tensile, ≥180 MPa yield, ≥10% elongation | Higher-strength aluminum grades need their own parameters and evidence |
| Thermal conductivity priority? | Adequate for many housings; verify in the final heat-treated condition | Copper alloys such as CuCrZr if conductivity leads |
AlSi10Mg powder data sheet: typical values
Typical partner-plant datasheet limits for AlSi10Mg powder, wt.%. The quoted lot COA governs. Full details and the reference price are on the AlSi10Mg grade page.
| Element | Limit, wt.% |
|---|---|
| Al | Balance |
| Si | 9.0–11.0 |
| Mg | 0.25–0.45 |
| Fe | ≤0.55 |
| Mn | ≤0.45 |
| Zn | ≤0.10 |
| Ni | ≤0.05 |
| O | ≤0.08 |
| Property basis | Value |
|---|---|
| PSD cuts offered | 20–63 µm, 15–53 µm, 45–106 µm |
| Process | LPBF |
| LPBF test bars, heat treated, room temperature | Tensile ≥280 MPa, yield ≥180 MPa, elongation ≥10% |
The property row is for test bars from the partner plant’s machine and heat treatment. Printed parts depend on machine, parameters, orientation and post-processing, so treat it as a comparison basis, not a part guarantee. For incoming powder, ISO/ASTM 52907:2019 gives the framework for characterizing metal powders (sampling, PSD, chemistry, traceability).
Why the alloy is widely used
Silicon improves melt behavior and reduces hot cracking sensitivity relative to many wrought aluminum alloys. That gives AlSi10Mg a practical manufacturing advantage, especially for complex lightweight parts.
For a weight-reduction project, AlSi10Mg is a candidate to evaluate against the machine, geometry and final-part requirements. Its established use in LPBF does not mean an unfamiliar lot or transferred parameter set will produce an acceptable part without validation.
Powder and handling priorities
A good lot review still includes PSD, morphology, chemistry, and packaging quality. Aluminum powders also need disciplined handling because oxide behavior can influence process stability and final part quality.
For LPBF, review the PSD window against the machine and recoating requirements. Also check flow or spreading behavior, apparent density, contamination control and storage history. The NIST review of moisture and powder characterization discusses how moisture and oxygen pickup can affect AlSi10Mg spreadability, powder-bed density and porosity. Ask about sealed packaging, opening history and the agreed condition for acceptance. Do not assume a universal shelf life or drying procedure; follow the applicable SDS and validated site procedures.
What to watch beyond printability
AlSi10Mg is attractive because it prints well relative to many aluminum candidates, but the project should still ask what happens after printing. Heat treatment, surface finishing, dimensional stability expectations, and target mechanical direction all influence whether the alloy remains the right choice.
For a thermal and lightweight part, check the actual strength, conductivity and dimensional requirements in the specified final condition. Conductivity-led designs may warrant a copper-based alternative; sustained high-temperature or wear duty may require another alloy family. The duty and acceptance tests, not the powder label, decide the fit.
If the geometry is thin-walled, thermal, or dimensional-control-sensitive, that should be defined early because it changes the technical conversation.
If the actual target is a lightweight housing, bracket, UAV structure, motor mount, sensor enclosure, or electronics frame, continue with the consolidated AlSi10Mg applications guide. The same material route can support these component searches while the finished-part acceptance changes with structural, thermal, vibration, sealing, and dimensional duty.
AlSi10Mg powder purchase fields
| Requirement | What to define |
|---|---|
| Alloy | Referenced AlSi10Mg chemistry and controlled elements |
| Powder | Atomization route, lot, PSD method, morphology, contamination and packaging |
| LPBF route | Machine/laser family, parameter status, layer strategy and atmosphere |
| Final condition | Stress relief or heat treatment, orientation, machining and surface route |
| Part evidence | Density/defect plan, dimensions, mechanical or thermal tests for the actual geometry |
Aluminum reflectivity, heat flow and oxide condition make transfer between machines or parameter sets risky. Do not accept “15-45 µm AlSi10Mg” as a complete process definition. Ask for the lot COA, PSD report, TDS/SDS, and available morphology or SEM evidence, then verify the powder on the intended LPBF route.
AlSi10Mg powder data sheet: TDS, COA or SDS?
An AlSi10Mg powder TDS normally describes a product or supply route; a lot COA reports batch-specific results; an SDS addresses safety information. They serve different purposes. A typical printed-part property table is not a powder certificate, and a chemistry certificate alone does not establish LPBF compatibility.
| Document | What to check | Limits |
|---|---|---|
| Technical data sheet (TDS) | Exact grade and source, revision, candidate PSD, test methods and the condition behind typical values | Typical values are not a batch guarantee |
| Certificate of analysis (COA) | Matching lot ID, measured chemistry/PSD where reported, units, methods and agreed acceptance limits | Does not verify unreported properties or a successful build |
| Safety data sheet (SDS) | Product identity, current revision and handling/storage information applicable to the destination and workplace | Does not establish powder quality or print parameters |
| Printed-part test report | Machine, build orientation, thermal condition, specimen, method and result | No automatic transfer to another machine or part geometry |
Need an AlSi10Mg powder data sheet? Request the TDS, SDS and available lot evidence with your AlSi10Mg inquiry. Include the proposed PSD, machine/process, quantity and destination; identify any missing specification as a review item. Document availability and scope must be confirmed for the proposed source and lot. This guide is not a downloadable supplier TDS or a batch certificate.
Read powder and finished-part data separately
ASTM F3318-18 addresses AlSi10Mg parts produced by laser powder bed fusion, including manufacturing and finished-part requirements. It is not a guarantee attached to every AlSi10Mg powder lot. Agree the edition and any purchaser requirements that apply to the actual part.
| Information received | What it can support | What remains to be established |
|---|---|---|
| Lot chemistry and measured PSD | Incoming powder review against agreed limits | Machine compatibility and build qualification |
| Typical mechanical-property table | Early comparison when the test condition is identified | Actual orientation, thermal treatment, specimen and acceptance basis |
| A nominal powder cut | An initial sizing discussion | Distribution, method, fines/oversize and recoater requirements |
| A successful coupon | Evidence for the tested build condition | Fatigue, sealing, dimensions or thermal duty of the actual component |
When two offers use different thermal conditions, do not rank their tensile, ductility or conductivity data as if they were equivalent. Ask which results describe the powder, which describe test specimens and which have been demonstrated on representative hardware. Missing evidence should remain an open requirement rather than an assumed capability.
Request AlSi10Mg powder with the machine, proposed PSD, quantity, destination and required documents. For lightweight housings, brackets, UAV frames and sensor enclosures, use the application guide above. If conductivity is the primary design driver, compare the CuCrZr route against the actual component requirements.