86CrMoV7, 1.2327 acc. to EN ISO 4957: 2000 are the grades with high hardenability and fracture toughness, which are designed for large-section tools for cold and hot working in the metallurgical industry. The above mentioned species are distinguished by, among others, the content of Chromium in chemical composition. The more Chromium, the better the product is for the larger work piece.NC7 steels are used as semiconductors in the state of high temperature for the production of forged cold-rolling rolls with barrel diameters up to 700mm, resistance roll shirts, dies and other parts of hot and cold rolling mill. They differ from other tool steels in the chemical composition, which consists of Chromium, Vanadium, high carbon content, and in one species of Molybdenum especially.
| DIN | 86CrMoV7, 1.2327 | ||||||||||
| 0.83 - 0.90 | 0.30 - 0.45 | 0.15 - 0.35 | Max 0.03 | Max 0.03 | 1.60 - 1.90 | 0.20 - 0.35 | 0.05 - 0.15 | - | - | ||
Modulus of elasticity [103 x N/mm2]: 210
Density [g/cm3]: 7.85
Thermal conductivity [W/m.K]: 35.0
Electric resistivity [Ohm mm2/m]: 0.30
Specific heat capacity[J/g.K]: 0.46
Hardening: 820-860℃/oil, water Tempering temperature: 200-600℃
Softening annealing below Ac1 w temperature 690 - 710℃ with cooling in a box, ash or sand
Softening annealing above Ac1 w temperature 750 - 770℃ with cooling in a furnace up to 600℃ with max. of 20℃/h
Softening annealing above Ac1 at 750 - 770 ℃ with cooling with isothermal conversion at 670 - 710 ℃
Hardening at 810 - 850℃ with cooling in oil Tempering at 100 ℃ in the air
| Grade | Shape | Dimensionmm | Qty.kg |
|---|---|---|---|
| 86CrMoV7 | Round bar | Φ90 | 232 |
| 86CrMoV7 | Round bar | Φ100 x 3270 | 223 |
| 86CrMoV7 | Round bar | φ100 x 3050 | 209 |
| 86CrMoV7 | Round bar | Φ100 x 3995 | 266 |
| 86CrMoV7 | Round bar | Φ100 x 3925 | 264 |
| 86CrMoV7 | Round bar | φ120 x 3765 | |
| 86CrMoV7 | Round bar | Φ130 | 232 |
| 86CrMoV7 | Round bar | Φ140 x 3705 | 476 |
| 86CrMoV7 | Round bar | Φ140 x 3685 | 460 |
| 86CrMoV7 | Round bar | Φ150 x 3810 | 540 |
| 86CrMoV7 | Round bar | Φ170 x 4355 | 798 |
| 86CrMoV7 | Round bar | φ320 x 1960 | 1264 |
Steel grade
Special steel