W.NR. 1.2327

Characteristics

High-alloy chrome steel with big hardenability for hardening in oil and in air, especially high resistance to the wear both by metal and by mineral substances, good cutting power, very high hardness in the pressure, significantly low toughness especially in traverse, significant carbide spacing. This steel has a good dimensional stability during the heat treatment but the change of dimensions is bigger than by the steel 1.2842. The steel is sensitive to the fast and uneven heating, suitable for hardening on the secondary hardness (the possibility of nitriding). Further the steel is brushed with big difficulties, at the heat it is forged with big difficulties and it has a rather difficult workability in the annealed state.

Comparable standards

DIN	W.Nr	AFNOR	AISI/ASIM	JIS
86CrMoV7	1.2327	95MnWCr5	K310	-

Chemical composition (typical; in weight %)

C	Si	Mn	P (max)	S (max)	Cr	Mo	V
0.83-0.90	0.15-0.35	0.30-0.45	0.03	0.03	1.60-1.90	0.20-0.35	0.05-0.15

Heat treatment of steel W.NR. 1.2327

Way		Temperature [°C]	Procedure
Forging		850-1050	Cool slowly in calm air or better e.g. in dry ash or other thermally-insulated material
Soft annealing		830-860	Warm few hours (according to the size of object), mostly four hours are enough and cool slowly in the furnace
Annealing to lower tension		600-650	Warm 1 to 2 hours and cool slowly in the furnace
Hardening		1000-1080	Cool in oil, air or salt bath at the temperature of about 500-550°C
Tempering		100-550	Cool in air, the degree of tempering is set by hardness and toughness of instrument according to the tempering chart

Note

Hardening temperature 1000-1050 °C
Chart of tempering values depending on the hardness