6HS steel
6CrNiNG Steel
Steel 6HS: Handbook of steels and alloys. Below is systematized information on the purpose, chemical composition, types of supply, substitutes, critical point temperatures, physical, mechanical, technological and foundry properties for the grade — Steel 6ÕÑ.
General information on 6CrS steel
| Type of delivery |
| Round 6ÕÑ, bar stock, 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 5950−73, GOST 4405−75. Forged and forged blanks GOST 5950−74, GOST 1133−71, GOST 7831−78. |
| Application |
| Pneumatic chisels and punches of small sizes for cold stamping, chopping knives. |
Chemical composition of 6ХС steel
| Chemical element |
% |
| Vanadium (V), not more than |
0.15 |
| Tungsten (W), not more |
0.20 |
| Silicon (Si) |
0.60−1.00 |
| Manganese (Mn) |
0.15−0.40 |
| Copper (Cu), not more than |
0.30 |
| Molybdenum (Mo), not more than |
0.20 |
| Nickel (Ni), not more than |
0.35 |
| Sulfur (S), not more than |
0.030 |
| Titanium (Ti), not more than |
0.03 |
| Carbon (C) |
0.60−0.70 |
| Phosphorus (P), not more than |
0.03 |
| Chromium (Cr) |
1.00−1.30 |
Mechanical properties of 6Cr steel
Mechanical properties depending on tempering temperature
| t tempering temperature, °C |
σ0.2, MPa |
σB, MPa |
δ5, % |
ψ, % |
KCU, J/m2 |
HRCe |
| Hardening at 880 °C in oil. Tempering temperature 2 h. |
| 200 |
2060 |
|
2 |
|
|
59 |
| 300 |
1910 |
2080 |
3 |
20 |
24 |
56 |
| 400 |
1760 |
1910 |
4 |
25 |
20 |
52 |
| 500 |
1250 |
1400 |
8 |
30 |
39 |
45 |
| 600 |
980 |
1070 |
20 |
|
46 |
|
Mechanical properties as a function of test temperature
| t test temperature,°C |
σB, MPa |
δ5, % |
ψ, % |
HB |
| Hardening with oil. Tempering at 600−620°C. |
| 100 |
760 |
11 |
45 |
249 |
| 200 |
800 |
|
|
240 |
| 300 |
800 |
13 |
|
230 |
| 400 |
660 |
16 |
|
190 |
| 500 |
500 |
18 |
48 |
150 |
| 600 |
330 |
19 |
62 |
130 |
| 700 |
225 |
22 |
71 |
100 |
Technological properties of 6HS steel
| Forging temperature |
| Beginning 1170, end 850. Cooling in the lined pit or under a layer of sand. |
Steel 6HS critical point temperature.
| Critical point |
°С |
| Ac1 |
770 |
| Ac3 |
830 |
| Mn |
250 |
Impact toughness of 6Cr steel
Impact toughness, KCU, J/cm2
| Delivery condition, heat treatment |
+20 |
-20 |
-60 |
| Hardening 840−860 C, oil. Tempering 250 C. |
|
24 |
21 |
| Tempering at 840−860 С, oil. Isothermal soaking at 250 C. |
343 |
13 |
12 |
Steel hardness 6HS
| Delivery condition, heat treatment regime |
HRCэ surface |
HB |
| Rings and strips annealed or high-temperatured |
|
229 |
| Samples. Hardened 840−860 C, oil. |
St 57 |
|
| Heating at 700−750 C. Tempering at 840−860 С, oil. Tempering 240−270 С, air (final heat treatment mode) |
53−56 |
|
