1.2312 40 CrMnMoS 8 6


1.2312 is plastic mould tool steels, suitable to operate in high temperature, used mainly for plastic moulds, hydroforming tools and frames for plastic pressure dies. They are highly hardenable, resistant to tempering and strong in high temperature.




%C %Si %Mn %P %S %Cr %Mo %Ni %W  % Ti
0,35-0,45 0,30-0,50 1,40-1,60 0,030 0,05-0,10 1,80-2,00 0,15-0,25


Hot working:

Forging temperature range: 1100-850℃

Note: Heat to 1200 ℃. Do not forge below 850.

Heat treatment:

soft annealing Hardness HB30 hardeninig tempering temper hardness(HRC)
760-780 230 830-870 640-680





Main application:

Tools for synthetic plastics-processing

Shape of product:

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