The discovery of Ductile Iron in 1948 gave a new lease on life to the cast iron family. By combining the castability of gray iron and the toughness of steel, Ductile Iron compelled a wide recognition as an economical choice for high performance complex ferrous parts. Fifty years of research and developme!J.t have led to a material whose properties can be tailored for applications requiring high toughness, corrosion resistance or high tensile strength. In this paper, the state-of-the-art of Ductile Iron technology is reviewed. It is shown that, although considered as a mature technology, recent process and product developments open new avenues to this family of materials.Resume-La decouverte de la fonte G.S. en 1948 a assure un second souffle a la grande famille des fontes.Combinant la coulabilite de la fonte grise et la resistance de l'acier, la fonte G.S. est rapidement devenue un choix incontournable pour la production de composantes de forme complexe exigeant des proprietes mecaniques elevees, et ce a un cout competitif. Cinquante annees de recherche et de developpement technologique ont conduit a la creation d'une famille de materiaux pouvant satisfaire des besoins aussi diversifies que la resistance a l'impact, a la corrosion ou a l'usure. Dans cet article, la technologie de la fonte G.S. est revue et discutee. II y est demontre qu'en depit du fait que la fonte G.S. est souvent consideree comme un materiau mature, de recents developpements ouvrent de nouveaux champs d'applications a la fonte G.S.

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