1.6523 21NiCrMo2


1.6523 is a case hardening steel. It is low-cost steel with excellent carburized properties. The nickel contributes to case toughness at high strength with above average core toughness.



C Si  Mn p s Cr Mo Ni B
0,17-0,23 0,40          0,65-0,95 0,035 0,035 0,40-0,70 0,15-0,25 0,40-0,70


Hot working:

Forging temperature range: 1240-850℃

Note: Heat to 1240 ℃. Do not forge below 850.

Heat treatment:


Hot working Soft annealing Heat treatment to obtain a certain structure Heat treatment to obtain a certain tensile strength Carburize Core hardening intermediate annealing Surface hardening Temper
650-700 850-950 900-1000 900-950 840-870 630-650 800-830 170-210


Main application:

Gear components, bolts, arbors, bushes, coupling boxes

Shape of product:

Round, flat, step shape, ring, disc other shape depend on customer needs