Hardness

HRB HRC Rm N/mm2 Fe Ni Cr Co Mo W Si Mn C Al Ti Li P S Mg Zn Cu Others

HB Unalloyed Steels 750-1100 740-1080

800-1200 750-1100 1100-1300 241-277HB 890 440-590 690-880 900-1100 530-860 700-950 950-1150 700-750 1050-1100 800 850 780-1180 850 800 705 510-710 740 560-1200

187HB 6000.40.30.120.15-0.35 0.6-1.050.350.0350.040.4Nb 0.4
0.40.40.150.10 min 0.29-1.06 0.30.0480.0580.4Nb 0.4
440-590
440-590
440-570
197HB 6600.40.40.150.10 min 0.29-1.06 0.30.050.0580.4Nb 0.4
0.40.30.10 min 0.6-1.350.30.0350.040.4
750
290-540
0.40.10 min 0.29-1.06 0.30.0250.025
300-500
460-500
197HB 6600.40.30.120.15-0.30 0.6-1.350.30.0350.040.4Nb 0.4
750
750
460-580
0.1-0.35 1.40.20.050.05
0.1-0.35 1.60.220.040.04
Material Guide –Keyto Recommended Inserts Material Designation
P Unalloyed SteelsP Alloyed SteelsM Stainless SteelsM K N S H PH Stainless Aluminum & Alloys High Temp. Alloys Hard Materials Cast Irons