Cetim characterises new steel grade for Laser Powder Bed Fusion Additive Manufacturing

July 22, 2019

July 22, 2019

Cetim has released its new steel grade: 33CrMoV12 for L-PBF manufacturing (Courtesy Cetim)

France’s Technical Centre for Mechanical Industry (Cetim) has released a new steel grade for the Laser Powder Bed Fusion (L-PBF) Additive Manufacturing of parts which can reportedly undergo nitriding treatment. According to Cetim, the new grade has been added to the list of steels used in AM and the organisation has characterised the 33CrMoV12 steel for the production of parts via L-PBF Additive Manufacturing as part of its R&D work carried out on behalf of French manufacturers. 

The organisation stated that with its high carbon rate and nitriding capability, this steel offers attractive mechanical properties and opens up new application possibilities, especially in the power transmissions sector. It joins the three steels already commonly used for L-PBF manufacturing: X2CrNiMo17-12-2 (316L) and X5CrNiCuNb16-4 (17-4PH) stainless steels and the X2NiCoMo18-9-5 steel (maraging 300). 

Cetim explained that although these three steels can be easily welded due to their low carbon levels (approximately 0.05%), the same is not true for the 33CrMoV12 grade, which can have a carbon percentage as high as 0.36%. Therefore, the powder for this type of material, must be pre-heated before L-PBF, making the manufacturing process more troublesome. 

Cetim believes that even though some AM systems have a pre-heating system, in most cases the pre-heating temperature is insufficient, being around 200°C and falling below the required 500°C. With a view to limiting and possibly eliminating this operation, one solution is to specifically determine the laser fusion parameters. 

The organisation’s study was carried out in conjunction with Volum-e, a polymer and metal prototyping and Additive Manufacturing specialist located in à Blangy-sur-Bresle (Seine-Maritime, France). By finely adjusting the parameters of the process, the two partners state that they were able to create test specimens and a demonstrator in the studied steel by L-PBF. 

Cetim reportedly continued the work by minutely examining the parts including: chemical analysis of the material, porosity rates, residual stresses, influence of the heat treatment on the mechanical strength (tension and bending), capacity for nitriding, fatigue strength, etc. The organisation states that the assessment of this study reveals that the steel 33CrMoV12, can be worked by L-PBF exhibiting mechanical performance that is higher than that of the same steel when laminated, and due to its nitriding capability, its scope of use ranges to heavily surface loaded parts.


July 22, 2019

In the latest issue of Metal AM magazine

Download PDF

Extensive AM industry news coverage, as well as the following exclusive deep-dive articles:

  • The GRCop story: The development, production and Additive Manufacturing of NASA’s rocket engine alloys
  • Formnext 2023: Innovations in metal Additive Manufacturing from the industry’s leading international exhibition
  • Cybersecurity in Additive Manufacturing: Securing the industry’s future
  • Additive Manufacturing in the jewellery industry: exploring the potential of platinum and titanium
  • Mission possible: The five-year plan to gain FAA and EASA acceptance of in-process monitoring

The world of metal AM to your inbox

Don't miss any new issue of Metal AM magazine, and get the latest industry news. Sign up to our twice weekly newsletter.

Sign up

Discover our magazine archive…

The free to access Metal Additive Manufacturing magazine archive offers unparalleled insight into the world of metal Additive Manufacturing from a commercial and technological perspective through:

  • Reports on visits to leading metal AM part 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 AM machines, metal powders or part manufacturing services?

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

  • AM machines
  • Process monitoring & calibration
  • Heat treatment & sintering
  • HIP systems & services
  • Pre- & post-processing technology
  • Powders, powder production and analysis
  • Part manufacturers
  • Consulting, training & market data
View online
Share via
Copy link
Powered by Social Snap