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D2 (K110)

D2 knifesteel.  Manufactured by Bohler-Uddeholm grade K110. Composition:

C 1.5 % Si 0.3 % Cr 12 % Mo 0.8% V 0.9%

Forging: 1050 to 850°C Slow cooling in furnace or thermoinsulating material.

Annealing: 800 to 850°C Slow controlled cooling in furnace at a rate of 10 to 20°C/hr down to approx. 600°C, further cooling in air.

Stress relieving: 650 to 700°C Slow cooling in furnace. Intended to relieve stresses set up by extensive machining, or in complex shapes. After through heating, hold in neutral atmosphere for 1 to 2 hours.

Hardening: 1020 to 1040°C Complex shapes / air, simple shapes / air blast, oil, salt bath from (220 to 250°C or 500 to 550°C) or gas. Holding time after temperature equalization 15 to 30 minutes. Obtainable hardness: 58 - 61 HRC.

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