ISO 513 System Chart - ISO K Intro CUTTING TAPS SP MS Material specific HS High speed SL 3 5 10 15 20 30 20 30 40 50 Vc (m/min) GGST CH (p. 272) ADI cast ironGJS-1000-5 - ADI 1000K4 PO ST Austenitic cast iron 0.6660 - GGL-NiCr 20 2 K3 Ni-Resist 2 ROLL ZET-B(p. 148) GGSTCT-FC(p.270) HFISP(p. 152) HFICT-B(p. 428)Carbide Nodular cast iron0.7040 - GGG 40K2 CARBIDE (p. 400) N-CT-FC GG-HT(p. 284) (p. 408)Carbide LONGGrey cast iron0.6025 - GG-25K1 HAND 3 5 10 15 20 30 20 30 40 50 Vc (m/min) TAPS Most suitable Suitable EG (STI) SPECIAL THREADS, GAUGES THREAD MILLS DIES CENTER DRILLS Technical info 33