reProd® – Resource-Autarkic Production Based on Secondary Semi-finished Products

Research output: Contribution to book/conference proceedings/anthology/reportConference contributionContributedpeer-review


  • Markus Werner - , Fraunhofer Institute for Machine Tools and Forming Technology (Author)
  • Rico Haase - , Fraunhofer Institute for Machine Tools and Forming Technology (Author)
  • Christian Hermeling - , Fraunhofer Institute for Machine Tools and Forming Technology (Author)


This paper presents a novel approach of a smart shortened material loop for producing second-life metallic components by saving a significant amount of energy and CO2 emissions. The focus is on metallic components and manufacturing chains based on adapted forming technologies. Sourcing and using secondary semi-finished products instead of virgin metallic materials facilitates the omission of process steps, such as iron smelting, steel making, continuous casting, hot and cold rolling, which involve the highest energy consumption and the highest CO2 emissions. Besides the positive impacts on sustainability, there are still scientific and technological challenges. One challenge lies in matching providers of secondary semi-finished material to market needs; the other comprises engineering the forming process chain while some material characteristics are not clearly specified or vary in a wide range. In contrast to the heavily restricted properties of virgin material, the characteristics of secondary semi-finished materials vary in a wider range and need to be elaborated. In the end, a new component will be produced, differing in design, function, and properties from conventional, single-life cycle products. Therefore, this paper introduces a novel, circular material loop for metals. The paper finishes with a short concept note on digital material and product passports to store and provide the required information on properties.


Original languageEnglish
Title of host publicationManufacturing Driving Circular Economy - Proceedings of the 18th Global Conference on Sustainable Manufacturing
EditorsHolger Kohl, Günther Seliger, Franz Dietrich
PublisherSpringer Science and Business Media B.V.
Number of pages9
ISBN (print)9783031288388
Publication statusPublished - 2023
Externally publishedYes

Publication series

SeriesLecture Notes in Mechanical Engineering


Title18th Global Conference on Sustainable Manufacturing, GCSM 2022
Duration5 - 7 October 2022

External IDs

ORCID /0009-0000-4965-8303/work/153109301


Sustainable Development Goals


  • Material loop, Metal recycling, Secondary semi-finished products