R6M5K5 steel
P6M5K5 steel
Steel Р6М5К5: a classifier 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 Р6М5К5.
General information on steel R6M5K5
| Delivery type |
| Bar stock, including shaped: GOST 19265−73, GOST 2590−71, GOST 2591−71. Calibrated bar GOST 19265−73, GOST 7417−75. Grinded rod and silversilver GOST 19265−73, GOST 14955−77. Strip GOST 19265−73, GOST 4405−75. Forged and forged blanks GOST 19265−73, GOST 1133−71. |
| Application |
| For machining of high-strength stainless and heat-resistant steels and alloys under conditions of excessive heat of cutting edge. |
Chemical composition of steel Р6М5К5
| Chemical element |
% |
| Vanadium (V) |
1.70−2.10 |
| Tungsten (W) |
5.70−6.70 |
| Cobalt (Co) |
4.70−5.20 |
| Silicon (Si), not more than |
0.50 |
| Manganese (Mn), not more than |
0.50 |
| Molybdenum (Mo) |
4.80−5.30 |
| Nickel (Ni), not more than |
0.40 |
| Sulfur (S), not more than |
0.030 |
| Carbon (C) |
0.84−0.92 |
| Phosphorus (P), not more than |
0.030 |
| Chrome (Cr) |
3.80−4.30 |
Process properties of steel R6M5K5
| Forging temperature |
| At the beginning 1160, at the end 850. |
| Grindability |
| good (GOST 19265−73) |
Steel Р6М5К5 critical point temperature
| Critical point |
°С |
| Ac1 |
840 |
| Ac3 |
875 |
| Ar3 |
805 |
| Ar1 |
765 |
Steel hardness Р6М5К5
| Delivery condition, heat treatment regime |
HRCe surface |
HB |
| Bars and strips annealed |
|
269 |
| Samples. Hardening at 1230 C in oil. Tempering (2 or 3 times) 550 C, 1 h. |
65 |
|
| Tempering at 1220 C. Oil. Tempering three times in 1 h. 500 C. |
67 |
|
| Tempering at 1220 °C in oil. Tempering three times in 1 hour 540 C. |
68 |
|
| 68 Tempering at 1220 °C in oil. Tempering three times in 1 hour 580 C. |
67 |
|
| 67 Quenching at 1220 °C in oil. Tempering three times in 1 hour 620 C. |
63 |
|
| 63 Tempering at 1220 °C in oil. Tempering three times in 1 hour 660 C. |
57 |
|
Physical properties of steel R6M5K5
| Temperature of testing, °С |
20 |
100 |
200 |
300 |
400 |
500 |
600 |
700 |
800 |
900 |
| Modulus of normal elasticity, E, GPa |
220 |
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| Shear modulus by torsion G, GPa |
83 |
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| Steel density, pn, kg/m3 |
8200 |
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| Heat transfer coefficient W/(m -°C) |
|
27 |
28 |
29 |
30 |
32 |
36 |
34 |
|
29 |
| Electrical resistivity (p, nominal value — m) |
458 |
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Heat resistance, red resistance of steel R6M5K5
Heat resistance
| Temperature, °С |
Time, h |
Hardness, HRCe |
| 630 |
4 |
59 |
