1.2379 is a High-carbon, high-chromium tool steels are subcategories of cold work tool. It is containing molybdenum and air hardening, and therefore has a high degree of dimensional stability in heat treatment. Although it can be quenched in oil, the movement is slightly greater when oil quenched. 1.2379 exhibits high wear resistance, which increases with greater carbon and vanadium content. 1.2379 steel may be satisfactorily welded using the atomic hydrogen, oxy-acetylene, gas tungsten-arc, and shielded-metal-arc processes.





%Si %Mn %P %S Cr Mo V other
1,50-1,60 0,10-0,40 0,15-0,45 0,030 0,030 11,0-12,0 0,60-0,80 0.90-1.10


Hot working:

Forging temperature range: 1100-850℃

Note: Heat to 1180 ℃. Do not forge below 850.

Heat treatment:

soft annealing

Hardness HB30 hardening tempering temper hardness(HRC)
840-860 250 1020-1040 180-250



Main application:


Cutting dies sensitive to breakage, thread rolling dies, reamers, sockets


Shape of product:


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