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
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