ASTM D2 steels alloy should be preheated very slowly to 815°C (1500°F) and then temperature can be increased to 1010oC (1850°F).
ASTM D2 steels ໂລຫະປະສົມຄວນຈະໄດ້ຮັບການ preheated ຊ້າຫຼາຍເພື່ອ 815oC (1500oF) ແລະຫຼັງຈາກນັ້ນອຸນຫະພູມສາມາດໄດ້ຮັບການເພີ່ມຂຶ້ນເພື່ອ 1010oC (1850oF).