What Materials Can the Additive Industries MetalFab G2 Print?

Direct answer: Additive Industries currently lists AlSi10Mg, AlSi7Mg0.6, Scalmalloy, GRCop-42, IN718, IN625, stainless 316L, tool steels M300 and M789, plus Ti6Al4V Grades 5 and 23 for the MetalFab G2. Those are the strongest public exact-model alloy routes. A listed name is not blanket permission to run every powder sold under that name: production support still depends on a written powder specification, released or validated parameters for the installed core and laser configuration, shielding gas, powder history, downstream treatment and finished-part acceptance.

The G2 adds a decision that a simple alloy list misses. Its modular architecture can combine a Core, Dual Core, automation modules and additional AM cores. Dedicated cores can make different-material scheduling and segregation cleaner, but they do not turn two powders into one supported build or transfer a process release between cores automatically. Buy around the exact recurring material workflows, core assignments and qualification records the factory will actually operate.

MetalFab G2 material compatibility at a glance

What the exact G2 page establishes

The current MetalFab G2 product page names the eleven alloy routes above. It specifies one to four 500 W Yb-fibre lasers with 450 W maximum allowable power, full-field access, a 110 micrometre focus diameter, automated laser-to-laser and focus calibration, and a 420 x 420 x 400 mm build volume. It also lists 20-120 micrometre layers, a build platform controllable to 175 C, fully internal automated powder extraction, sieving and recycling, automated plate levelling and positioning, argon shielding with nitrogen on request, compressed air and three-phase electrical service.

Those facts define configuration questions, not universal outcomes. The page also promotes productivity, quality, uptime, operator safety and lower cost per part. Treat those as manufacturer claims. The public productivity example is explicitly tied to a Ti6Al4V Productivity Parameter and four lasers; it is not a promised rate for another alloy, geometry, support strategy, layer setting or acceptance standard. The page does not establish a specific job's yield, tolerance, surface, property value, consumable cost, uptime, ROI or payback.

Multi-core flexibility is a segregation decision

The G2 architecture offers Core and Dual Core arrangements and says up to two additional AM cores can be added for multi-material flexibility and continuous production. Interpret that as separate production resources, not simultaneous multi-material printing inside one part. Before purchase, ask Additive Industries to identify how each proposed core is commissioned, which powder and parameter package belongs to it, and what hardware, software, filtration, tooling and service records move with that assignment.

A dedicated core can reduce the frequency of alloy changeovers and make genealogy easier, especially when reactive, regulated or contamination-sensitive materials recur. It does not eliminate shared-facility risks. Powder load tools, containers, transport paths, sieves, filters, vacuum or cleanup equipment, build plates, carts, depowdering equipment, tools and post-processing areas can still create cross-contact. Map every shared interface and establish cleaning, verification, labelling, quarantine and release rules.

Do not buy an extra core only because the brochure uses the phrase multi-material. Compare the real schedule: recurring alloy families, changeover duration, qualified cleaning burden, powder inventory, staffing, downstream capacity and planned uptime. If one alloy dominates and the second is occasional, outsourcing the second route or scheduling controlled campaigns may be cleaner than owning another core. GoodPrints does not claim a throughput or payback result for either choice.

Released parameters and open development are different lanes

Additive Industries' current materials program describes a Process Readiness Level framework for developing and releasing metal parameters. It separates R&D, foundation and production maturity and says released work can include process understanding, dense-part and border parameters, material structure and physical properties, powder specifications, supports, downskin, scaling, beam compensation, heat treatment, repeatability and system-to-system evidence as maturity increases.

The same source says MetalFab systems have open architecture, allowing customers to develop or modify parameters. That is useful, but it transfers responsibility. A different powder supplier, particle distribution, layer strategy, scan pattern, border, plate temperature, laser assignment, core, gas or software state may require new evidence. Do not call a customer-developed route Additive Industries-supported unless current written documentation says so.

Released Quality, Balanced and Productivity settings have different objectives. A high-density or thin-wall route is not interchangeable with a deposition-rate route. Bind the category, geometry range, density acceptance, surface target, mechanical-property evidence, core and laser configuration to the exact controlled release.

One to four lasers needs configuration-specific evidence

The G2's full-field laser architecture can change assignment and overlap decisions as laser count changes. A process demonstrated with one or two lasers should not be assumed to cover four. Require the released package to name the laser count, usable power, optical and alignment state, scan and border strategy, layer thickness, field assignment, software version and Dynamic Laser Assignment state.

Representative evidence should cover the build locations and laser interactions production will use. One convenient coupon cannot establish every position or transition. Repeat the appropriate controls after optical work, a laser-count change, software or parameter revision, core reassignment, material change or major service event.

The manufacturer publishes an accuracy/reproducibility figure below 0.05 mm. Treat it as a vendor specification with its own test scope, not a guaranteed finished-part tolerance. Geometry, supports, thermal history, stress relief, machining and inspection still control the delivered result.

Powder specification and history are part of compatibility

The materials source states that typical powder ranges for the technology include 15-45 micrometres and 20-63 micrometres depending on material. That is not permission to choose either range for every alloy or parameter package. Chemistry, morphology, satellites, size distribution, flow, apparent density, oxygen, moisture and reuse state affect spreading and melt behaviour.

For production, document supplier and lot, certificate, particle distribution, virgin/recovered blend rules if allowed, sieving, sampling, exposure, storage, container identity, quarantine and disposition. A familiar alloy name from another supplier can remain outside the released route. Automated extraction and recycling reduce manual handling but do not erase powder genealogy.

The current page says the G2 can maintain powder under inert conditions through loading, depowdering and sieving. Treat that as the designed workflow, not proof that contamination, oxidation, moisture or operator exposure can never occur. Verify the installed options, maintenance state, seals, filtration, alarms, procedures and actual powder path.

Automation does not transfer material qualification

Robot and Exchange Modules can transfer build plates, while a Storage Module can support sequences of up to eight jobs. Automation changes handling and scheduling; it does not expand the alloy list or validate a new parameter. Every queued job still needs the correct core, powder identity, plate, parameter and software version, gas, build file, downstream route and release authority.

Define what happens when a job, sensor, powder path, plate transfer, depowdering step or inspection gate fails. Prevent the scheduler from continuing with an ambiguous material or plate identity. Connect machine and QMS data to powder lot, build, core, laser configuration, alarms, deviations, post-processing and inspection. A continuous production claim is only useful when nonconforming work can be contained and traced.

Gas, utilities and facility are material boundaries

The specification lists argon shielding and nitrogen on request. Confirm the gas permitted by the exact alloy and parameter release, including purity, supply, monitoring, alarms, ventilation and oxygen-deficiency controls. Nitrogen availability is not permission to substitute it for an argon-qualified process.

The core configuration also lists 6-10 bar compressed air at 1000 Ndm3/min and three-phase 3 x 63 A power. Obtain current site-preparation, installation, operating and maintenance documents for the purchased modules. Qualified professionals should verify electrical service and isolation, gas and compressed-air supply, cooling, ventilation or source control, floor loading, access, environmental limits, robot or transfer guarding, alarms, interlocks and emergency response.

Powder, fire, electrical, guarding and PPE boundaries

Fine metal powders can create inhalation, skin, static, combustible-dust and fire hazards; exact hazards change with alloy and particle condition. Inert gas can displace oxygen. Lasers, electrical systems, hot surfaces, motion, robots or plate-transfer equipment, heavy build hardware and downstream depowdering or machining add distinct risks.

Follow Additive Industries instructions and each powder safety data sheet. Keep guards and interlocks intact. Use compatible grounded handling and cleanup equipment, and establish ventilation, housekeeping, storage, PPE, spill, fire and emergency controls with the responsible site EHS team, fire authority and qualified electrical, ventilation and automation professionals. NIOSH safe-3D-printing guidance supports source control and exposure reduction, but it is not a MetalFab commissioning plan. GoodPrints is not the final safety authority.

Finished-part fitness remains application specific

A dense build is not automatically a qualified component. Define support removal, stress relief, heat treatment or HIP where required, internal-powder removal, machining, surface treatment, cleaning and inspection. Connect those steps to load, fatigue, temperature, pressure, corrosion, conductivity, wear, tolerance and service life.

Aerospace, pressure, lifting, vehicle-control, medical, food-contact, semiconductor and other high-consequence uses need applicable standards, traceability and responsible approval. Industry examples and alloy pages do not certify a finished part for a particular use.

Buyer and owner decision

• Choose the G2 for a released recurring route when Additive Industries can identify the exact powder, PRL or release state, parameter category, core, laser count, plate, gas and downstream condition.
• Add or dedicate cores for verified scheduling value when recurring alloys justify segregation, controlled powder paths and parallel capacity. Do not equate multiple cores with one multi-material part.
• Choose automation for a controlled job family only after plate identity, exception handling, powder genealogy, downstream capacity and QMS traceability are defined.
• Fund development deliberately for another powder, supplier or modified setting. Budget EHS, metallurgy, parameter development, post-processing, metrology and quality resources.
• Compare another LPBF platform when its released alloy or cell architecture is cleaner. Review the MetalFab 420K guide, MetalFab 300 Flex guide and Nikon SLM NXG 600E guide without assuming parameters transfer.
• Choose another process for polymer powder, filament, wire, pellet, resin, paste or slurry.
• Outsource first when demand is intermittent or the team cannot own powder, gas, facility, automation, downstream processing and production records.

For a defined part, use the material-selection checklist, review the custom-printing service FAQ, request a GoodPrints quote, or use the JC Print Farm route when external production is the better fit.

Bottom line

The MetalFab G2 has current public exact-model routes for eleven aluminium, copper, nickel, stainless, tool-steel and titanium grades. The usable material is still the joined system of named powder, released or validated parameters, assigned core, installed laser and software state, plate, gas, powder lifecycle, downstream processing and finished-part evidence. Multi-core and automated configurations can improve segregation or scheduling, but they do not broaden support by themselves.

Official sources checked

• Additive Industries MetalFab G2 product page for current identity, exact listed alloys, modular core and automation configurations, laser options, field, powder handling, gas and utility specifications.
• Additive Industries materials and PRL page for readiness levels, released Quality/Balanced/Productivity objectives, open parameter development and powder-control context.
• NIOSH: Approaches to Safe 3D Printing for source-control and exposure-reduction boundaries.