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