Steel 9KhVG
9XVG steel
Steel 9KhVG: Handbook of steels and alloys. Below is systematized information on the purpose, chemical composition, types of supply, substitutes, critical point temperature, physical, mechanical, technological and foundry properties for the grade — Steel 9KhVG.
General information about 9XVG steel
| Grade substitute |
| steel ХВВГ. |
| Kind of delivery |
| Sections, including shaped: GOST 5950−73, GOST 2590−71, GOST 2591−71. Calibrated bar GOST 5950−73, GOST 7417−75, GOST 8559−75, GOST 8560−78. Grinded rod and silversilver GOST 5950−73, GOST 14955−77. Strip GOST 4405−75. Forged and forged blanks GOST 5950−73, GOST 1133−61, GOST 7831−78. |
| Application |
| Thread gauges, templates of complex shape, complex very precise dies for cold work, which when quenched should not be subjected to significant volumetric changes and warping. |
Chemical composition of 9XVG steel
| Chemical element |
% |
| Tungsten (W) |
0.50−0.80 |
| Silicon (Si) |
0.15−0.35 |
| Manganese (Mn) |
0.90−1.20 |
| Copper (Cu), not more than |
0.30 |
| Molybdenum (Mo), not more than |
0.30 |
| Nickel (Ni), not more than |
0.35 |
| Sulfur (S), not more than |
0.030 |
| Carbon (C) |
0.85−0.95 |
| Phosphorus (P), not more than |
0.030 |
| Chrome (Cr) |
0.50−0.80 |
Process properties of 9XVG steel
| Forging temperature |
| The beginning 1120, the end 850. The cooling is slow. |
Steel 9XVG critical point temperature
| Critical point |
°С |
| Ac1 |
750 |
| Ac3 |
900 |
| Mn |
205 |
Steel hardness 9ХВГ
| Delivery condition, heat treatment regime |
HRCe surface |
HB |
| Annealed or high-temperature bars and strips |
|
241 |
| Samples. Hardened 820−840 C, oil. |
St. 63 |
|
| Isothermal annealing 780−800 C, cooling 50 deg/h to 670−720 C, holding for 2−3 h, cooling 50 deg/h to 550 C, air. |
|
241 |
| Heating at 650 C. Tempering at 820−840 С, oil. Tempering at 160−180 С, air. |
St. 62 |
|
| Tempering at 650 C. Tempering at 820−840 С, oil. Tempering at 170−230 C, air. |
61−63 |
|
| Tempering at 650 °C. Tempering at 820−840°C, oil. Tempering 230−275 C, air. |
57−61 |
|
| Tempering at 840 C, oil. Tempering temperature 1.5 hours. Tempering at 100 C. |
66 |
|
| Tempering at 840 °C, oil. Tempering temperature 1.5 h. Tempering at 150 C. |
66 |
|
| Tempering at 840 °C, oil. Tempering temperature 1.5 h. Tempering at 200 C. |
61 |
|
| Tempering at 840 °C, oil. Tempering temperature 1.5 h. Tempering 250 C. |
58 |
|
| Tempering at 840 °C, oil. Tempering time at tempering 1.5 h. Tempering 300 C. |
56 |
|
| Tempering at 840 °C, oil. Tempering time at tempering 1.5 h. Tempering 350 C. |
52 |
|
