Page 440 - ISCAR(MILLINGCATALOG 38_2021)
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USER GUIDE
      THREAD MILLING TOOLS



          Number of Radial Passes

                                                   Tensile                                Lead (mm)
                                                  Strength   Hardness   Material   0.25-1.00  1.25-1.50  1.75-2.00  2.50-6.00
           ISO      Material          Condition   [N/mm ]    HB       No.              Number of passes
                                                       2
                          < 0.25 %C    Annealed     420      125       1
                          >= 0.25 %C   Annealed     650      190       2
            Non-alloy steel   < 0.55 %C  Quenched and   850  250       3
            and cast steel,            tempered
            free cutting steel         Annealed     750      220       4
                          >= 0.55 %C  Quenched and
                                       tempered    1000      300       5
                                       Annealed     600      200       6
          P                                                                     1        1        2        3
            Low alloy and cast steel (less          930      275       7
            than 5% of alloying elements)  Quenched and   1000  300    8
                                       tempered
                                                   1200      350       9
                                       Annealed     680      200      10
            High alloyed steel, cast
            steel and tool steel     Quenched and   1100     325      11
                                       tempered
                                    Ferritic/martensitic  680  200    12
            Stainless steel and cast steel
                                      Martensitic   820      240      13
          M Stainless steel         Austenitic, duplex  600  180      14        1        1        2        3
                                     Ferritic/pearlitic      180      15
            Grey cast iron (GG)
                                    Pearlitic /martensitic   260      16
                                        Ferritic             160      17
          K Nodular cast iron (GGG)                                             1        1        2        3
                                       Pearlitic             250      18
                                        Ferritic             130      19
            Malleable cast iron
                                       Pearlitic             230      20
                                     Not hardenable          60       21
            Aluminum- wrought alloy
                                      Hardenable             100      22
                           <=12% Si  Not hardenable          75       23        1        1        1        1
            Aluminum-                 Hardenable             90       24
            cast, alloyed
                           >12% Si  High temperature         130      25        1        1        2        3
          N                >1% Pb     Free cutting           110      26
            Copper alloys               Brass                90       27
                                    Electrolytic copper      100      28
                                                                                1        1        1        1
                                      Duroplastics,
            Non metallic              fiber plastics                  29
                                      Hard rubber                     30
                                       Annealed              200      31
                           Fe based
                                       Hardened              280      32
            High temperature           Annealed              250      33
            alloys         Ni or Co
          S                 based      Hardened              350      34        2        2        2        3
                                        Cast                 320      35
                                        Pure        400               36
            Titanium alloys           Alpha+ beta
                                    alloys, hardened   1050           37
                                       Hardened             55 HRC    38
            Hardened steel
          H                            Hardened             60 HRC    39
            Chilled cast iron           Cast                 400      40        3        3        3        3
            Cast iron                  Hardened             55 HRC    41        2        2        2        3
          Rm - ultimate tensile strength, MPa








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