Designation
| Name |
The value |
| Designation GOST Cyrillic |
Р9М4К8-МП |
| Designation GOST Latin |
P9M4K8-MP |
| Transliteration |
R9M4K8-MP |
| By chemical elements |
- |
| Name |
The value |
| Designation GOST Cyrillic |
ДИ102-МП |
| Designation GOST Latin |
DI102-MP |
| Transliteration |
DI102-MP |
| By chemical elements |
CuИ102-MoP |
Description
Steel R9M4K8-MP used: for the production of hot rolled and forged strips, hot rolled, forged and calibrated rods, rods with special surface finish produced by hot gas-static pressing (GGP) pulverized powder with subsequent deformation of the blanks; shaped cutters, drills, reamers, core drills, milling cutters (worm, terminal, disk, special), dalbekov, shaver for processing high-strength steels and heat resistant steels and alloys.
Standards
| Name |
Code |
Standards |
| Bars and shapes |
В22 |
GOST 1133-71, GOST 2590-2006, GOST 2591-2006 |
| Sheets and strips |
В33 |
GOST 4405-75 |
| Bars and shapes |
В32 |
GOST 7417-75, GOST 28393-89 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Cu |
N |
V |
Mo |
W |
O |
Co |
| GOST 28393-89 |
1.1-1.2 |
≤0.03 |
≤0.03 |
≤0.5 |
3-3.6 |
≤0.6 |
≤0.4 |
Rest |
≤0.25 |
0.02-0.06 |
2.3-2.7 |
3.8-4.3 |
8.5-9.5 |
≤0.02 |
7.5-8.5 |
Fe is the basis.
Technological properties
| Name |
The value |
| Sanding behaviour |
Of 1.00 to 1.30 relative to steel of grade R6M5. |
| Wear resistance |
tool life of 1.50-2.00 in comparison with steel R9M4K8. Tensile strength in bending MPa 3000-3700. |
