Two programmes for two operating problems

France-based Gränges Powder Metallurgy, PINT and IRT M2P have reported two aluminium–scandium alloy programmes for laser powder bed fusion. One is an Al–Si–Sc system intended to retain dimensional stability at elevated temperature; the other is an Al–Mg–Sc composition targeting fatigue duty in hydrogen environments at 100–250°C. First demonstrators are expected in 2027, so this is a development milestone rather than a qualified production material.

The Al–Si–Sc programme builds on the three-year AluScaL project, completed in 2025, and Gränges' experience with hypereutectic aluminium–silicon powders. IRT M2P is running atomisation trials to study chemistry changes while PINT develops the PBF-LB parameter window. The partners report encouraging early processability across a broad window, but the material test programme is not scheduled to conclude until the fourth quarter of 2026.

Why add scandium to aluminium?

Small scandium additions can form fine coherent precipitates in aluminium, potentially increasing strength, limiting grain coarsening and improving weldability. Rapid PBF-LB solidification remains sensitive to cracking, porosity and anisotropy, so chemistry must be assessed together with laser parameters, powder condition and heat treatment. The high-silicon variant targets thermal stability and dimensional accuracy, but the announcement provides no tensile, creep or thermal-cycling dataset yet.

For the Al–Mg–Sc alloy, hydrogen exposure, a 100–250°C temperature range and cyclic loading form the combined requirement. The partners have produced pilot powder, plan additional atomisation trials and expect PBF-LB experiments in the final quarter of 2026. Characterisation and qualification are targeted for the first quarter of 2027, supported by an unnamed energy-sector industrial partner. Exact chemistry is withheld while patent work proceeds.

Powder and process must be qualified together

One dense coupon cannot qualify a new AM alloy. A credible programme must cover particle-size distribution, sphericity, oxygen and moisture, powder reuse, specimens from different build positions, heat treatment and surface condition. Hydrogen service adds cyclic loading, media compatibility, crack-growth behaviour and long-duration thermal ageing.

Scandium supply and cost are separate risks. The partners say emerging sources, including Canadian projects, could reduce Western supply concerns, but that is not the same as stable, qualified and economical series supply. Industrial adoption will depend on performance, scandium content, powder yield, reuse behaviour and part-level cost.

Editorial assessment

The programmes matter because they target two explicit operating envelopes instead of promising a generic high-strength aluminium. The evidence-bearing next steps are the late-2026 test results, 2027 demonstrators and published temperature- and orientation-dependent data. Until those arrive, the broad process window, good processability and application potential remain partner claims.

Sources

- Metal AM — Gränges, PINT and IRT M2P develop aluminium-scandium alloys for AM, October 8, 2026. - Metal AM — Scandium Canada and Gränges PM cooperation background, November 12, 2025.