40CrMnNiMo8-6-4 / 1.2738

Juostos, kvadratai,
blokai
storis ≥600mm, plotis
≥1000mm

 

Description:

heat treated steel to reach approx. hardness  of 30 HRC, good machinability, good for texturing, good polishability, high through hardenability due to nickel content

Application:

large injection moulds, large bodies of plastic moulds and pressure moulds, where high strength of the core is required

Chemical composition [%]
C Mn Si P S Cr Ni Mo W V Co Cu
0,35-0,45 1,3-1,6 0,2-0,4 max 0,035 max 0,035 1,8-2,1 0,9-1,2 0,15-0,25 - - - -

 

Equivalents
PN W. nr EN AISI Russia (GOST) Other
- 1.2738 40CrMnNiMo8-6-4 P20+Ni - M238, Impax

 

Processes
nitriding TAK
hardening TAK temp. 840 – 870 [°C]
tempering TAK temp. 500 – 650 [°C]

 

Hardness
after toughening 51 HRC
after softening 235 HB