Steel K110 (D2, 1.2379)
Steel with higher corrosion-proof (not stainless). Excellent wear resistance (edge holding), harder for sharpening. Little lower toughness – not suitable for long blades (swords, machetes). Required care - clean and dry after use, otherwise start blacken (oxidize)
C-1,55 Cr-11,8 P-0,03 Si-0,25 Mn-0,35 Mo-0,8 S-0,02 V-0,95
Heat to 800-850oC, cool slowly in furnace
Remove stresses before hardening by heating up to 700°C, equalise, then cool slowly
Pre heat to 750/780°C and thoroughly soak. Continue heating to the final hardening temperature of 1010/1030°C and allow the component to be heated through. Quench in oil or cool in air.
air or warm bath quenching 500-550oC, hardeness after quenching 63-65 HRC
Tempering °C 150 200 250 300 350 400
HRC 62/61 61/60 60/59 57/56 56/55 56/55
hold for at least one hour per inch of total thickness
Possibility of secondary hardening – quench from 1070°C, tempering 2 hours at 530-540°C, resulting hardness 60-62 HR
Heat slowly and uniformly to 700°C, then more rapidly to 900/1040°C. After forging cool slowly.