( laitons)

 

              Caractéristiques physiques et mécaniques

 

                        Densité                                         8.4 à 8.6                 Coefficient de dilatation à 20°C        18 à 21 x 10-6

                        Point de fusion                           900 à 1070°C         Conductibilité thermique à 0°C         0.29 à 0.56 cal. Cm .s.°C

                        Température de forgeage          670 à 600 °C          Module d’élasticité à 20°C                10 000 à 12 000 kg/mm²

                        Température de recuit                550 à 600°C           Module de torsion                              4 000 kg/mm²

 

                       

            Etat de livraison

                                                                                                                                                                                                                           UZ39PB3

                                               UZ15                     UZ33                     UZ36                     UZ40                     0 ou ep   UZ36PB3             UZ40PB3

                                               R kg         A%          R kg         A%          R kg         A%          R kg         A%                          R kg         A%          R             A%

                                               Mm²                        Mm²                        Mm²                        Mm²                                        Mm²                        kg mm²

 

            Recuit          0              27            45            30            53            31            48            32            45            ?7           45            6              50            4

            Ecroui  ¼ Dur H11      30            25            33            35            33            32            36            20            8à15        41            8              45            6

            Ecroui ½ Dur H12       35            18            39            20            38            16            40            12            16à25      37            12            40            10

            Ecroui ¾ Dur H13       39            13            43            12            42            10            45            8              26à50      34            15            38            12

            Ecroui ¼ Dur H14       43            10            47            8              46            7              51            6              51à80      32            18            37            15

            Ressort        H15         50                           54            3              53            3              57            3              ?8          

 

 

              Caractéristiques chimiques et électriques

 

 

                     Dénomination                             Composition chimique garantie

                                                                                                                                                                                                                          

                                                               %CU     %Pb                      Zn                          Maxi                            Conductivité               Résistivité

                                                                                                                                             impureté                      électrique                   ( µ.Ω.cm)

                                                                                                                                     ( IACS)

                                                  

            1 /2 rouge    cuzn15                    84à86                                     Reste                       0.40                                        37%                       4.70

            Artillerie     cuzn33                    65.5à68.5                               _                             0.40                                        26%                        6.20

            1er titre        cuzn36                    62à65.5                                  _                            0.40                                        28%                        6.67

            2ème titre      cuzn40                    59à62                                     _                           0.40                                        28%                        6.21 

            Horlogerie  

            Décolletage cuzn39pb2               58à60      1.5à2.5                    _                            0.70        

            Décolletage cuzn36pb3               60à62      2.5à3.5                    _                            0.50                                                                             

            Décolletage cuzn40pb3               57à59      2.5à3.5                    _                            0.70

                       

 

 

                       

                 

                    

          Indications d’emploi

 

                   Formes commerciales courantes                                                  Propriétés et principaux domaines

                                                                                                                                             D’application

                        Symboles         Laminés   Tréfilés    Etirés       Tubes et   Forgés

                        AFNOR                                          ou filés      profilés

 

                        CU-ZN15        n                                                                                            Bijouterie fantaisie, médailles.                                           

                        CU-ZN33        n                                                                                            Emboutissage profonds, phares d’auto, électronique.

                        CU-ZN36        n             n             n             n             n                             Découpage, emboutissage, repoussage                                

                                                                                                                                              Frappe à froid, lustrerie, décoration, électronique.             

                        .                                                                                                                     Attache pierres et marbres                                                

                        CU-ZN40        n                                                                                            En barres et planche sur commande usine.

                        .                                                                                                                    .Mécanique générale, pièces découpées, cambrées.

                                                                                                                                              Usinage : 40% par rapport au laiton de décolletage

                        CU-ZN39        n                             n             n             n                             Décolletage grande vitesse. Mécanique. Horlogerie           

                        Pb2                                                                                                                Décoration gravure.                                                         

                        CU-ZN36                                       n                                                            .Décolletage ultra rapide. Déformation modérée à

                        Pb3                                                                                                                froid. Mécanique, électronique. Pratiquement pas de

                        .                                                                                                                     Risque de « season cracking »                                

                        CU-ZN40                                       n                                                             Décolletage ultra rapide.