Metal powder applications should be organized by what the part must do, not by a list of industries. Aerospace, medical, energy, semiconductor, tooling, and industrial programs can use the same alloy for different reasons, while two parts in the same industry may need completely different powders.
A defensible selection sequence is:
- identify the governing failure mode or functional requirement,
- decide whether additive manufacturing creates enough geometric or production value,
- choose the process,
- shortlist the alloy,
- define powder and lot requirements,
- qualify the complete manufacturing route.
This page is a cross-application decision map. It does not claim that a named alloy automatically qualifies a part.
Application-to-powder selection matrix
| Application problem | Powder routes commonly reviewed | Why they enter the discussion | Main risk to resolve |
|---|---|---|---|
| Lightweight structural bracket or node | Ti64, AlSi10Mg | Strength-to-weight, topology optimization, integrated geometry | Fatigue, orientation, support removal, heat treatment |
| High-temperature structural or rotating-adjacent hardware | IN718 | Precipitation-strengthened high-temperature route | Creep/fatigue basis, heat treatment, defects, inspection |
| Hot-gas, furnace, or combustor hardware | Alloy X, IN625, IN718 | Oxidation, thermal cycling, corrosion, or strength depending on duty | Alloy/environment match, cracking, thermal fatigue |
| Corrosion-resistant manifold or fluid block | 316L, IN625, Grade 2 titanium | Corrosion behavior plus consolidated passages | Media compatibility, trapped powder, cleaning, leak testing |
| Medical implant or porous structure | Ti64 Grade 23, selected CoCrMo routes | Biocompatible material families and geometry freedom | Regulatory route, validation, cleaning, surface, traceability |
| Dental framework or wear-resistant medical hardware | CoCrMo, titanium depending on device | Stiffness, wear, established material families | Device-specific requirements, finishing, patient-contact controls |
| Cold plate, heat spreader, induction component | CuCrZr, pure copper | Thermal/electrical conductivity and integrated cooling | Machine compatibility, conductivity, leakage, machined interfaces |
| Lightweight electronics or sensor housing | AlSi10Mg, Ti64 | Low mass, integrated mounting and thermal paths | Distortion, sealing, surface finish, stiffness |
| Mold insert with conformal cooling | H13, M300 | Internal cooling channels and tooling performance | Heat treatment, cracking, channel integrity, wear surfaces |
| Strong stainless latch, fixture, or actuator housing | 17-4PH | Higher stainless strength after aging | Condition, distortion, fatigue/wear, corrosion margin |
| High-volume small sintered part | 316L, 17-4PH | Binder jet or MIM production economics | Shrinkage, density, debinding, sintering, tolerance |
| Repair overlay or feature addition | IN625, tool steel, other DED alloys | Local deposition on existing hardware | Substrate compatibility, dilution, heat input, qualification |
The table identifies candidate routes. It does not replace design allowables, corrosion testing, regulatory review, or machine-specific validation.
First decide whether AM is the right route
Metal AM creates the most value when at least one of these is true:
- internal passages cannot be drilled or joined reliably,
- topology optimization materially reduces mass,
- multiple parts can be consolidated,
- conformal cooling changes tool performance,
- low-volume complexity makes tooling uneconomic,
- repair or feature addition is more valuable than replacement,
- a porous or lattice structure is functionally required,
- rapid design iteration has higher value than unit cost.
AM may be the wrong route when:
- the part is a simple bar, plate, tube, or turned geometry,
- a casting, forging, extrusion, or machined billet has lower total risk,
- internal powder cannot be removed or verified,
- required surfaces are inaccessible to finishing and inspection,
- production volume favors stamping, casting, MIM, or another mature route,
- the available AM process lacks a qualified material or property basis,
- the design cannot tolerate anisotropy, residual stress, or build variation.
Choosing powder before proving AM value reverses the engineering sequence.
Aerospace and space hardware
Ti64 for weight-critical structures
Ti64 powder is commonly reviewed for brackets, lattice nodes, propulsion support hardware, hydraulic manifolds, UAV structures, and other weight-sensitive parts. The value usually comes from mass reduction, consolidation, or passage geometry rather than titanium alone.
Use the titanium powder center and Ti64 aerospace structures guide to separate a broad alloy choice from a flight-hardware route.
IN718 for strength at temperature
IN718 powder is relevant to hot-side structural housings, compressor or turbomachinery hardware, fuel-nozzle support geometry, and other parts where high-temperature strength is more important than corrosion alone. Heat treatment, HIP where applicable, machining, nondestructive evaluation, and defect acceptance must be planned with the build.
AlSi10Mg for lightweight housings
AlSi10Mg is often cleaner than titanium for lower-temperature electronics housings, UAV structures, sensor enclosures, and frames where cost and mass dominate. It should not inherit titanium fatigue or temperature assumptions.
NASA’s active NASA-STD-6030 covers AM processes used in design, fabrication, and testing of spaceflight hardware. The lesson for powder buyers is that a common aerospace alloy name is only one input to a controlled process and qualification route.
Medical and dental applications
Ti64 Grade 23 and cobalt-chrome powders appear frequently in medical and dental searches, but the application cannot be reduced to “medical-grade powder.”
Ti64 Grade 23
Grade 23 is commonly reviewed for orthopedic implants, spinal cages, porous structures, and selected surgical hardware where the ELI chemistry route, lattice design, surface condition, cleaning, and traceability are relevant.
Continue with the Grade 23 implant guide or Grade 23 surgical guide and instrument hardware.
CoCrMo
CoCrMo powder is relevant to dental frameworks, crowns, wear-resistant hardware, and selected device families. Stiffness, wear, finishing, chemistry, and device-specific evidence matter. It is not automatically interchangeable with titanium.
FDA’s Technical Considerations for Additive Manufactured Medical Devices addresses design, manufacturing, and device testing considerations. Powder documentation supports the route, but the final device remains subject to its applicable regulatory classification and evidence requirements.
Thermal and electrical applications
CuCrZr versus pure copper
Pure copper is attractive when maximum conductivity is the first requirement. CuCrZr gives up some conductivity in exchange for more strength and process margin. The decision appears in:
- cold plates and liquid-cooling manifolds,
- heat spreaders,
- RF thermal hardware,
- induction coils,
- busbar transition components,
- rocket or high-heat-flux cooling parts.
The real questions are thermal resistance, current path, pressure and leakage, channel cleaning, machined contact faces, joining, and machine capability. Use the copper powder guide and CuCrZr versus pure copper guide.
316L in cooling systems
316L can be the better choice for distribution manifolds, sensor blocks, and corrosion-aware fluid routing where structural integrity and sealing matter more than thermal conductivity. It should not be used as the heat-transfer material simply because the system is called liquid cooling.
Browse the AI liquid cooling application center for the copper-versus-stainless split.
Corrosion, chemical, marine, and clean-fluid hardware
316L
316L is the broad stainless starting point for moderate corrosion service, manifolds, clean-flow hardware, filters, and fluid blocks. LPBF can consolidate passages, but internal roughness, trapped powder, crevices, cleaning, and leak testing can govern acceptance.
IN625
IN625 enters when corrosion, temperature, chloride exposure, chemical service, or marine duty moves beyond a practical stainless margin. It is commonly discussed for chemical nozzles, brine hardware, marine ducting, valve components, and DED repair overlays.
Grade 2 titanium
Grade 2 or TA1 titanium can be a corrosion-led route when commercially pure titanium behavior is more important than Ti64 strength. The buyer still needs a specific media and temperature review.
Use the stainless steel powder center and nickel alloy powder center to compare adjacent materials. No powder page should be treated as a corrosion-compatibility approval.
High-temperature energy and propulsion hardware
High-temperature applications require a more precise question than “heat-resistant powder.”
| Governing requirement | First route to review | Reason |
|---|---|---|
| High-temperature structural strength | IN718 | Precipitation-strengthened nickel route |
| Oxidizing hot-gas or furnace environment | Alloy X | Hot-gas and oxidation-oriented alloy logic |
| Corrosion-heavy hot-side or chemical flow | IN625 | Corrosion and ductility emphasis |
| Elevated-temperature lightweight titanium structure | TA15 | Specialized near-alpha titanium route |
| Conductive cooling near high heat flux | CuCrZr | Thermal transfer with more strength than pure copper |
Applications include turbine hardware, combustor components, hydrogen burner hardware, heat exchangers, fusion cooling mockups, geothermal components, and propulsion support systems. Each has different pressure, media, cycling, inspection, and code requirements.
Use the energy and propulsion center and IN718, IN625, and Alloy X comparison guide.
Tooling, molds, dies, and production equipment
H13 for hot-work and thermal cycling
H13 powder is used for die-casting and hot-work inserts, conformal cooling tools, and surfaces exposed to repeated heating and cooling. Cracking control, heat treatment, hardness, cooling-channel integrity, and finishing are central.
M300 for high-strength precision tooling
M300 maraging steel powder is used for compact mold inserts, core components, sliders, lifters, and precision tooling where aged strength and dimensional control are important.
ORNL describes conformal cooling and metal deposition as ways AM can overcome conventional channel constraints in tooling. Its metal additive manufacturing overview provides application context, while the actual alloy decision remains tool-specific.
Compare H13 and M300 powder and browse the tooling and mold insert center.
Industrial production, binder jet, and MIM
Binder jet and MIM are not simply lower-cost LPBF.
316L is often selected for corrosion-resistant, ductile, high-volume small parts. 17-4PH is used when higher stainless strength after heat treatment is required. The powder system must support packing, binder interaction, debinding, sintering, shrinkage, density, and dimensional repeatability.
The business case depends on volume, part size, tolerance, secondary operations, and furnace utilization. A fine powder that is appropriate for MIM or binder jet may be unsuitable for LPBF handling.
Use the MIM and binder jet application center and compare 316L with 17-4PH.
Process selection by geometry and production need
| Process | Best fit | Powder decision focus |
|---|---|---|
| LPBF | Complex dense parts, fine passages, lattices, low-to-medium volume | Fine PSD, spreading, chemistry, morphology, parameter compatibility |
| EBM | Selected conductive alloys, often titanium, with vacuum/preheat route | Coarser PSD, charging/preheat behavior, recovery |
| Powder-fed DED | Repair, large features, overlays, material addition | Feeding, carrier gas, deposition efficiency, substrate compatibility |
| Binder jet | Scalable complex parts followed by sintering | Packing, binder interaction, shrinkage, density, furnace route |
| MIM | High-volume small parts using molded feedstock | Fine powder, rheology, debinding, shrinkage, sintered properties |
For process detail, use the LPBF, EBM, DED, binder jet, and MIM centers.
Information needed for an application-led RFQ
A useful inquiry should describe both powder and part intent:
- part or application family,
- governing load, temperature, corrosion, conductivity, wear, or regulatory requirement,
- candidate alloy or an open material-selection question,
- manufacturing process and machine,
- target PSD,
- quantity and project stage,
- required chemistry, oxygen, traceability, and test reports,
- post-processing and inspection assumptions,
- destination and timing.
Example:
We are evaluating CuCrZr powder for an LPBF liquid-cooling plate with internal channels and machined thermal interfaces. Please quote a 25 kg development lot and provide the powder production route, lot chemistry, PSD, available morphology/density/flow data, packaging, and lead time. The machine and target PSD can be shared after NDA review.
This gives the supplier enough context to challenge the alloy or powder route when necessary.
Final selection rule
Start with the requirement most likely to make the part fail: mass, corrosion, temperature, conductivity, wear, fatigue, dimensional stability, production cost, or regulatory evidence. Select the process only if AM geometry or economics add real value. Then qualify the alloy, powder lot, build, post-processing, and inspection as one route.
For feedstock fundamentals, continue with the metal powder for 3D printing buying guide. For supplier evidence, use the powder supplier qualification guide.