EOS partners with Constellium on aluminium AM alloys
EOS GmbH, headquartered in Krailling, Germany, has announced a strategic partnership with Constellium, based in Paris, France, under which EOS will add Constellium Aheadd CP1 to its materials portfolio as EOS Aluminium Constellium CP1. EOS Aluminium Al5X1 will remain in the EOS materials portfolio, to be renamed EOS Aluminium Constellium Al5X1, and will be added to Constellium’s alloy portfolio.
This partnership combines EOS’ expertise in AM technologies, materials, global deployment and industrialisation with Constellium’s proven capabilities in advanced aluminium alloy development. The collaboration extends beyond these two materials and establishes a long-term framework for the development of next-generation aluminium alloys for Additive Manufacturing.
For customers, the partnership expands access to advanced aluminium materials across EOS and AMCM metal systems with validated process parameters and application expertise, enabling faster qualification and supporting reliable industrial-scale production.
“This partnership represents a unique opportunity to bring next-generation aluminium alloys into industrial Additive Manufacturing at scale. By combining Constellium’s alloy development expertise with EOS’ leadership in AM, we aim to accelerate innovation and unlock new high-performance applications for customers worldwide,” said Ludovic Piquier, Senior Vice President, Manufacturing Excellence and Chief Technical Officer at Constellium.
With the addition of EOS Aluminium Constellium CP1, EOS further strengthens its materials portfolio for industrial applications. The material will be available from EOS in August 2026.
Key benefits of EOS Aluminium Constellium CP1 include:
- Higher strength compared to traditional alloys, combined with good elongation
- Simplified heat treatment with no quenching required and flexible heating and cooling cycles
- Good thermal stability for demanding industrial applications
- Free of volatile elements such as Mg and Zn, supporting stable processing at high laser power and increased productivity
- Excellent corrosion resistance
- Good electrical and thermal conductivity
- Easily anodised and well suited for electrochemical polishing
Typical applications include heat exchangers; semiconductor industry applications such as heat sinks and wafers; components requiring high-quality surface finishing, polishing, and anodisation; parts exposed to corrosive environments as an alternative to coated traditional alloys; and lightweight structural components with moderate mechanical load requirements.
EOS states that many existing AlSi10Mg applications can benefit from EOS Aluminium Constellium CP1’s improved processing characteristics and performance advantages.
Complementing the aluminium alloy portfolio, EOS Aluminium Constellium Al5X1 provides a high-strength, high-elongation, and anodisable solution for demanding aerospace, transportation, and motorsport applications.
Joachim Zettler, Chief Technology Officer, EOS, shared, “With EOS Aluminium Constellium CP1, EOS Aluminium Constellium Al5X1, and our partnership with Constellium, we are setting a new benchmark for aluminium in Additive Manufacturing. Together, we are enabling higher performance, greater productivity, and faster industrial adoption for our customers.”
