The new cast hot work die steel (CHD steel) has high strength and toughness, high thermal stability, high lifetime and wide application prospects.

The effects of rare earth (re) complex modification on structure and the properties of a new cast hot-work die (CHD) steel were investigated.

A new processing technique for seamless tubes manufacture of austenitic stainless steel is introduced in the present work, in which die casted hollow blank is directly used for a hot extrusion.