What Materials Can the Additive Industries MetalFab 300 Flex 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 300 Flex. Those are the strongest public exact-model routes. They are not permission to load any powder carrying a similar alloy name. Production support still joins the exact powder specification, released or validated parameter set, installed two- or four-laser configuration, build-field licence, process gas, powder history, downstream treatment and finished-part acceptance.

The buyer decision is therefore simple: choose the 300 Flex around a written recurring process, or budget it as an open process-development platform. The machine's open architecture can support customer parameter work, but openness is not the same as a released production route. If the required feedstock is not metal powder for laser powder bed fusion, use another process.

MetalFab 300 Flex material compatibility at a glance

What the exact-model page establishes

The current MetalFab 300 Flex product page names the alloys above and specifies a laser-powder-bed platform with two 500 W Yb-fibre lasers in the base specification and four as a field upgrade. It states a 300 x 300 x 400 mm base build volume and a licensed 420 x 420 x 400 mm scan-field option, 20-120 micrometre layers, a controllable build-platform temperature to 175 C, internal automated extraction, sieving and recycling, automated plate levelling, argon shielding with nitrogen on request, 6-10 bar compressed air and three-phase 63 A power.

Those facts define configuration questions, not universal outcomes. The page also carries manufacturer claims about affordability, utilization, consistency, quality, flexibility and reduced investment risk. Treat those claims as vendor positioning. They do not establish a job's build time, yield, density, tolerance, surface, property value, consumable cost, uptime, ROI or payback.

The licensed scan-field option is especially important. A nominal machine name does not prove that the larger field is active. Require the installed licence and configuration to be recorded with the process release, and qualify representative locations across the field actually used.

Released parameters and open architecture are different lanes

Additive Industries' current materials program describes a Process Readiness Level framework for developing and releasing material parameters. It says released work covers process behaviour, dense-part parameters including borders, material structure and physical properties, plus a basic datasheet and powder specification. That framework is the right starting point for a repeatable production process.

The same source says MetalFab systems have open architecture, so customers can modify baseline parameters or develop their own. That is valuable for research and specialized applications, but it moves responsibility. A changed powder, layer strategy, scan pattern, border, plate temperature, laser assignment or gas condition needs new evidence. Do not label a customer-developed route as Additive Industries-supported unless current written documentation says so.

Additive Industries groups released settings as Quality, Balanced and Productivity. Those labels express different objectives; they are not interchangeable. A parameter aimed at density and thin walls may not have the same deposition rate or surface tradeoff as one aimed at productivity. Keep the category, geometry range, density acceptance, surface target and finished-part evidence attached to the exact release.

Powder specification is part of compatibility

The manufacturer states that MetalFab systems use industry-standard powder distributions and gives 15-45 micrometre and 20-63 micrometre as typical ranges depending on material. That is not permission to use either range for every alloy. Chemistry, morphology, size distribution, satellites, flow, apparent density, oxygen or moisture limits and reuse state affect spreading and melt behaviour.

For every route, document supplier and lot, certificate, particle range, virgin/recovered blend rules if allowed, sieving, sampling, exposure, container identity, quarantine and disposition. A familiar alloy name from a different supplier can still sit outside a released parameter package. Incorrect distribution can reduce flow or increase entrapped-gas porosity, exactly the failure mode the current official materials page warns about.

The integrated extraction, sieving and recycling system reduces handling steps but does not erase powder history. Define how material stays segregated during loading, unloading, recovery, storage and changeover, and how contact parts, tools, filters and the surrounding cell are cleaned before another alloy enters the system.

Two versus four lasers needs configuration-specific evidence

A process released on the two-laser base machine should not be assumed to cover the four-laser upgrade. Ask which optical configuration, field layout, alignment state, border strategy and Dynamic Laser Assignment setup belong to the material release. Multi-laser work also needs evidence across representative build locations and any field-transition regions, not one convenient coupon.

The same principle applies after a field upgrade, software change, material change or major service event. Record calibration and process versions, then use an approved requalification plan proportional to the part risk. Laser count and nominal wattage do not prove that an unlisted powder will process safely or meet properties.

The 300-to-420 mm licence changes the production question

The optional larger field can accommodate a larger part or different nesting plan, but it does not automatically preserve every result from the base field. Thermal accumulation, gas flow, recoating, supports, distortion, scan strategy and build-location effects still need coverage. For a recurring large part, define the exact field licence, placement, orientation, supports, layer strategy, downstream machining allowance and inspection locations in the controlled route.

Likewise, the 175 C controllable build plate is a process variable, not a shortcut to alloy compatibility. Use the temperature specified by the released route and verify the actual substrate, plate preparation, levelling, preheat, cooling and part-removal workflow. A temperature ceiling by itself says nothing about a powder's supported status.

Argon, nitrogen, compressed air and utilities are material boundaries

The current specification lists argon shielding and nitrogen on request. Confirm the gas permitted for the exact alloy and parameter set, along with purity, supply, monitoring, alarms, ventilation and oxygen-deficiency controls. Do not substitute nitrogen because it is available; reactive alloys and released processes can require a specific atmosphere.

The machine also calls for substantial compressed air and three-phase electrical service. Obtain the current Additive Industries site-preparation, installation, operating and maintenance documents for the purchased configuration. Qualified local professionals should confirm electrical service and isolation, gas supply, compressed air, cooling, exhaust or source control, floor and access requirements, environmental limits, alarms, interlocks and emergency response.

Powder, fire, electrical, guarding and PPE boundaries

Industrial metal powder bed fusion is not a desktop-printer installation. Fine metal powders can create inhalation, skin, static, combustible-dust and fire hazards; the hazard changes with alloy, particle condition and contamination. Inert gas can create an oxygen-deficiency hazard. Lasers, motion, electrical equipment, hot surfaces, heavy build hardware and downstream depowdering or machining add separate risks.

Follow Additive Industries instructions and each powder's safety data. 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 and ventilation professionals. NIOSH's 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 the duty: load, fatigue, temperature, pressure, corrosion medium, conductivity, wear, dimensional tolerance and service life.

Aerospace, pressure, lifting, vehicle-control, medical, food-contact, semiconductor and other high-consequence uses need the applicable standards, traceability and responsible approval. The manufacturer's industry examples and alloy pages do not certify a finished part for a particular application.

Buyer and owner decision

• Choose the MetalFab 300 Flex for a released route when Additive Industries can identify the exact powder, PRL/release state, parameter category, laser and field configuration, plate, gas and downstream condition for a recurring part family.
• Choose it for development only when open parameter work is intentional and the organization has powder EHS, metallurgy, process-development, post-processing, metrology and quality resources.
• Buy the base field first when the recurring envelope fits 300 x 300 x 400 mm and the larger field has no proven production value. Require written licence, process and qualification scope before counting the 420 mm option.
• Pause for written confirmation when a powder is not one of the exact listed routes, the supplier or particle range changes, or the two/four-laser, gas, plate, field or parameter state is ambiguous.
• Compare another metal platform when the required released alloy, envelope or cell workflow is a better fit elsewhere. Review the EOS M 400-4 materials guide, Nikon SLM NXG 600E materials guide and 3D Systems DMP Factory 500 materials 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 controls, post-processing and production records.

For a defined part, start with 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 300 Flex has current exact-model routes for the listed aluminium, copper, nickel, stainless, tool-steel and titanium grades. The production-capable material is still the joined system of named powder, PRL/released or validated parameters, installed laser and field state, plate, shielding gas, powder lifecycle, downstream processing and finished-part evidence. Buy around that written process or around a deliberately funded development program, not around alloy names, laser count or temperature alone.

Official sources checked

• Additive Industries MetalFab 300 Flex product page for current identity, exact listed alloys, two/four-laser configurations, licensed build fields, plate temperature, powder handling, gas and utility specifications.
• Additive Industries materials and PRL page for released Quality/Balanced/Productivity parameters, open architecture, powder controls and typical particle-size ranges.
• Current official aluminium, copper, iron, nickel and titanium family pages for portfolio context, not blanket interchangeability.
• NIOSH: Approaches to Safe 3D Printing for source-control and exposure-reduction boundaries.