Latrobe DuraTech 20CV is a powder metallurgy stainless steel. It is highly wear resistant so it will hold an edge for a long time. The composition is almost identical to Bohler M390. Carpenter makes 20CV for Latrobe.
CTS-204P and M390 are shown in the table above for comparison purposes.
Austenitize: Heat reapidly to 2050°-2150°F. Soak for 30 minutes. Lower austenitizing temperatures maximize impact toughness. Higher austenitizing temperatures maximize edge holding. Quickly plate or air quench to 125°-150°F.
Cryogenic Treating: Cryo is recommended for austenitizing temperatures at or above 2100°F. Cool to -100 °F, removed from cryo and allow blade to warm to room temperature in cool air.
Temper: Temper immediately after cryo or quench if cryo is not performed. Temper for 2 hours. Use the table below to select the rockwell hardness.
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