EOS expands the range of metals for its EOS M 290 AM machine

July 14, 2022

EOS has introduced three new metal materials for its EOS M 290 metal 3D printer (Courtesy EOS GmbH)
EOS has introduced three new metal materials for its EOS M 290 metal AM machine (Courtesy EOS GmbH)

EOS GmbH, headquartered in Krailling, Germany, has introduced three new metal materials for Additive Manufacturing on the company’s EOS M 290 metal AM machine. These include EOS StainlessSteel 254, EOS StainlessSteel SuperDuplex and EOS ToolSteel CM55. The company also recently announced the release of EOS NickelAlloy HAYNES® 282®.

EOS StainlessSteel 254 is an austenitic stainless steel that comes with a 40/60 µm process for the EOS M 290 machine. Its high chromium, molybdenum and nitrogen alloying giving excellent corrosion resistance in many difficult environments.

The material has an excellent stress corrosion cracking and higher strength than conventional austenitic steel. It also shows excellent resistance to uniform, pitting and crevice corrosion. It is particularly suited for applications such as chlorinated seawater handling equipment, pulp, and paper manufacturing devices as well as chemical handling equipment.

EOS StainlessSteel SuperDuplex comes with a 40/80 µm process for the EOS M 290 machine. This is an austenitic-ferritic duplex stainless steel optimised for Additive Manufacturing while maintaining super duplex properties. Its high chromium, molybdenum and nitrogen alloying offer excellent corrosion resistance in many difficult environments. At the same time, it shows excellent resistance to uniform, pitting and crevice corrosion, as well as enabling high strength together with high corrosion resistance.

The optimisation of phase balance enables the use of the product in a manufactured condition in many use cases. The material is particularly suited for applications in the oil and gas industry, in pulp and paper manufacturing devices and for mining and offshore equipment.

EOS ToolSteel CM55 comes with a 40/80 µm process for the EOS M 290 machine. It is a cobalt-free, ultra-high strength, and high hardness steel for tooling and engineering solutions. Its alloying elements and moderate carbon content form a strong and stable structure for demanding applications and for use in elevated temperatures. Typical applications are cold and hot working tools, powertrain components and parts for mechanical engineering.

EOS explains that it uses an approach that it states is unique in the Additive Manufacturing industry which involves taking each of the three central technical elements of the production process into account: the machine, the material, and the process. The data resulting from each combination is assigned a Technology Readiness Level (TRL) which makes the expected performance and production capability of the solution transparent. EOS incorporates these TRLs into two categories: premium products (TRL 7-9) offer highly validated data, proven capability, and reproducible part properties. Core products (TRL 3 and 5) enable early customer access to newest technology still under development and are therefore less mature with less data. All of the above materials have a TRL 3 Core classification.

Sascha Rudolph, SVP BU Metal Materials at EOS, commented, “Material development is always driven by customer demand and very often is the result of a close customer cooperation. These four new metal materials were designed and optimized specifically to the needs of Additive Manufacturing. We are increasing application opportunities for demanding industries by bringing AM tailored alloys to our customers.”


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