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1.2767 X45NiCrMo4  Technical Data 1.2767 X45NiCrMo4 is a higher carbon version of the standard 4¼% nickel air/oil hardening steel. 1.2767 X45NiCrMo4  achieves a good hardness and is suitable for applications demanding extra wear resistance. TYPICAL ANALYSIS   C. Ni. Cr. Mo. 0.45% 4.10% 1.40%   0.30% Forging: Heat slowly and uniformly to 1050°C. After forging cool slowly. Annealing: Heat uniformly to 630/650°C. Soak well and cool slowly in the furnace. Hardening: Pre heat the 1.2767 tool slowly to 650/700°C and thoroughly soak. Continue heating to the final hardening temperature of 840/870°C and allow the component to be heated through. Quench in oil or cool in air. Tempering: Heat the 1.2767 tool uniformly and thoroughly at the selected tempering temperatures and hold at heat for one hour per inch of total thickness.   Tempering °C     100     200     300     400     500     600 HRc  56  54  50  46  42   38