HJ цуврал хацарт бутлуур. ... (550°C) Hardness, HRC 50 45 40 35 30 25 930°F (500°C) Oil pan cover Die casting die for aluminum oil pan cover ... HRC 60 55 50 45 40 35 30 25 Austenitizing temperature ... changes and dis-tortion. Insufficient levels of machine stock may re-sult in slower than recommended quench rates dur-ing ...