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C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
C21D1/02—Hardening articles or materials formed by forging or rolling, with no further heating beyond that required for the formation
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FR1005871D1947-10-101947-10-10Procédé pour la fabrication d'un acier trempé à ténacité et à limite d'élasticité élevées
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