Following are the properties of hard steel:
(1) It can be easily hardened and tempered.
(2) It can be magnetized permanently.
(3) It cannot be readily forged and welded.
(4) It has granular structure.
(5) It is not easily attacked by salt water.
(6) It is tougher and more elastic than mild steel.
(7) It is used for finest cutlery, edge tools and for parts which are to be subjected to shocks and vibrations.
(8) It rusts easily and rapidly.
(9) It s melting point is about 13000C.
(10) Its specific gravity is 7.90.
(11) Its ultimate compressive strength is about 140 to 200 kN per cm2.
(12) Its ultimate shear strength is about 110 kN per cm2.
(13) Its ultimate tensile strength is about 80 to 110 kN per cm2.