AddUp releases AISI 420 steel to enable complex, efficient moulds

January 18, 2023

Additively manufactured mould built from AISI 420 steel (Courtesy AddUp)
Additively manufactured mould built from AISI 420 steel (Courtesy AddUp)

AddUp, headquartered in Cébazat, France, has released AlSl 420 steel, specifically developed for processing by Additive Manufacturing. The new material will enable tooling manufacturers produce more complex, efficient moulds, and is now available for all FormUp® 350 New Generation Powder Bed Fusion (PBF-LB) machines.

The company, a joint venture created by Michelin and Fives, is said to be one of the first players in the metal AM sector to offer a recipe for implementing AISI 420 steel. Also referred to in the German standard as 1.4021 or 1.2083, this stainless steel has both high mechanical strength and good corrosion resistance.

“Unlike alloys specially designed for Additive Manufacturing, which require users to invest in developing suitable post-processing, we offer here a widely used grade,” stated Frédéric Sar, Materials Manager at AddUp. “With AISI 420, the post-printing operations are identical to those of parts produced by forging. Existing solutions in heat treatments, surface treatments, machining settings, and insert grades are directly applicable to printed parts.”

This allows manufacturers to have a wide range of treatments at their disposal, enabling them to target specific properties for each application. For example, the quenching/tempering type heat treatments already available for raw 420 steel enables additively manufactured parts to display tensile strength characteristics in the range of 1350-1980 MPa, with elongation at break values of 2-10%, depending on the tempering temperature. Standard surface treatments, such as nitriding, can also significantly increase the surface hardness of parts after machining.

The AISI 420 alloy does not contain cobalt or nickel, making it compatible with the requirements of the REACH directive.

The FormUp 350 New Generation Additive Manufacturing machine (Courtesy AddUp)
The FormUp 350 New Generation Additive Manufacturing machine (Courtesy AddUp)

AddUp recently installed a FormUp 350 New Generation machine at the Aachener Werkzeubau Akademie GmbH (WBA), a leading German technical center for tooling. Equipped with AISI 420 stainless steel powder, and the newly developed recipe, the machine was capable of additively manufacturing parts with porosity rates less than 0.05%.

In the latest issue of PM Review…

Download PDF

Extensive Powder Metallurgy industry news coverage, and the following exclusive deep-dive articles and reports:

  • Phoenix Sintered Metals: A story of transformation, growth and community from America’s PM heartland
  • World PM2024 Yokohama: The stage is set for the PM industry to find a path to sustainable growth
  • The state of Europe’s hard magnets industry and the challenge of optimising the mass production of Nd2Fe14B permanent magnets

The latest news from the world of metal powders, delivered to your inbox

Don't miss any new issue of PM Review, and get the latest industry news. Sign up to our weekly newsletter.

Sign up

Join our community

Discover our magazine archive…

The free-to-access PM Review magazine archive offers unparalleled insight into the world of Powder Metallurgy from a commercial and technological perspective through:

  • Reports on visits to leading PM part manufacturers, metal powder manufacturers and industry suppliers
  • Articles on technology and application trends
  • Information on materials developments
  • Reviews of key technical presentations from the international conference circuit
  • International industry news

All past issues are available to download as free PDFs or view in your browser.


Browse the archive


Looking for PM production equipment, metal powders, R&D support and more?

Discover suppliers of these and more in our
advertisers’ index and buyer’s guide, available in the back of PM Review magazine.

  • Powders & materials
  • Powder process, classification & analysis
  • PM products
  • Atomisers & powder production technology
  • Compaction presses, tooling & ancillaries
  • Sintering equipment & ancillaries
  • Post-processing
  • Consulting & toll sintering
View online
Share via
Copy link