Performance Characteristics:
Hardening in air, featuring a fine combination of hot strength, cracking resistance and impact toughness in work 600 Centigrade; Applications:
Be used for cold mould such as punch die 、wire-drawing die、thread rolling mould 、cold heading mould and cold extrusion mould.
Chemical Composition (%)：
C： 2.00-2.30 Cr： 11.00-12.50 Mo： ≤0.35 Si： ≤0.40 P： 0.03 S： 0.03 W：0.60—0.90
Heat Treatment:
Annealing : 800 - 850 centigrade.
Hardness after annealing : Max. 250 HB
Stress relieving : 650 - 700 centigrade.
Hot forming : 1050 - 850 centigrade.
Hardening : 950 – 980 centigrade.
Quenching media : Oil, Salt bath ( 220 - 250 centigrade or 500 - 550 centigrade ).
Hardness after quenching : 64 - 66 HRC.
Delivery condition:
EAF or ESR; hot rolled or forging;black,machined surface;Annealing.
