6XVG steel
6XVG steel
Steel 6KhVG: 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 6KhVG.
General information on 6XVG steel
| Type 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. Forgings and forged blanks GOST 5950−74, GOST 1133−71, GOST 7831−78. |
| Application |
| Complex shaped punches for cold piercing predominantly shaped holes in sheet and strip material, small dies for hot stamping, mainly when minimum dimensional change during quenching is required. |
Chemical Composition of 6XVG 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) |
0.55−0.70 |
| Phosphorus (P), not more than |
0.030 |
| Chromium (Cr) |
0.50−0.80 |
Mechanical properties of 6XVG steel
Mechanical properties depending on tempering temperature
| t tempering temperature, °C |
σ0.2, MPa |
σB, MPa |
δ5, % |
ψ, % |
KCU, J/m2 |
HRCe |
| Hardening at 870 °C in oil. Tempering temperature 2 h. |
| 200 |
1820 |
1852 |
2 |
3 |
26 |
56 |
| 300 |
1700 |
2009 |
1 |
5 |
14 |
55 |
| 400 |
1470 |
1690 |
7 |
26 |
20 |
51 |
| 450 |
1450 |
1570 |
10 |
38 |
46 |
46 |
| 500 |
1270 |
1390 |
10 |
30 |
30 |
40 |
| 550 |
1180 |
1270 |
11 |
20 |
40 |
34 |
Mechanical properties as a function of test temperature
| t test temperature,°C |
σ0, 2, MPa |
σB, MPa |
δ5, % |
ψ, % |
KCU, J/m2 |
| Hardening at 870 °C in oil. Tempering at 450 °C, 2 h. |
| 200 |
1240 |
1460 |
10 |
40 |
51 |
| 300 |
1180 |
1440 |
14 |
49 |
46 |
| 400 |
1100 |
1390 |
11 |
55 |
41 |
| 500 |
810 |
880 |
15 |
72 |
44 |
Technological properties of 6XVG steel
| Forging temperature |
| Beginning 1160, the end 850. Slow cooling in the wells. |
Temperature of 6XVG steel critical points
| Critical point |
°С |
| Ac1 |
780 |
| Ac3 |
795 |
| Ar3 |
695 |
| Ar1 |
675 |
| Mn |
280 |
6XVG steel hardness
| Delivery condition, heat treatment regime |
HRCe surface |
HB |
| Rings and strips annealed or high-temperatured |
|
217 |
| Samples. Hardened 850−900 C, oil. |
St. 58 |
|
| Annealing 800−820 C, cooling 50 deg/h to 600 C, air |
|
217 |
| Tempering 700−750 C. Tempering 860−900 C, oil. Tempering 200−250 C, air |
54−57 |
|
| Heating at 700−750°C. Tempering at 860−900 C, oil. Tempering 450−480 C, air |
46−49 |
|
