Designation
| Name |
The value |
| Designation GOST Cyrillic |
95Х13М3К3Б2Ф |
| Designation GOST Latin |
95X13M3K3B2F |
| Transliteration |
95H13M3K3B2F |
| By chemical elements |
95Cr13Mo3Co3Nb2V |
| Name |
The value |
| Designation GOST Cyrillic |
ЭП766 |
| Designation GOST Latin |
EP766 |
| Transliteration |
EhP766 |
| By chemical elements |
- |
Description
95Х13М3К3Б2Ф steel is used: for the manufacture of extra-strong parts, parts for the aerospace industry.
Note
Steel corrosion-resistant martensitic class.
Standards
| Name |
Code |
Standards |
| Classification, nomenclature and General rules |
В20 |
OST 1 90005-91 |
| Bars and shapes |
В32 |
TU 14-1-2700-79 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
V |
Mo |
Nb |
Co |
| TU 14-1-2700-79 |
0.85-1.05 |
≤0.02 |
≤0.02 |
≤0.6 |
12.5-14.5 |
≤0.6 |
≤0.6 |
Rest |
0.3-0.6 |
3-3.8 |
1.5-2 |
3-3.8 |
Fe is the basis.
According to TU 14-1-2700-79 the chemical composition is presented for steel grade 95H13M3K3B2F-VI (EP766-VI).
Mechanical properties
| σU, MPa |
HRC |
| Gradation of performance properties of the finished heat-treated parts for OST 1 90005-91 |
| 2156-2254 |
58-61 |
Description mechanical marks
| Name |
Description |
| σU |
Limit short-term strength |
| HRC |
Rockwell hardness (indenter diamond spheroconical) |
Technological properties
| Name |
The value |
| Macrostructure and pollution |
Bars on the other 14-1-2700-79 monitored for the presence of carbide heterogeneity on the methodology and scale No. 2 GOST 5950. Carbide heterogeneity is controlled on the samples, tempered at a temperature of 1120-1140 °C, cooling in oil with following tempering at a temperature of 490-510 °C, exposure for 2 hours. Carbide inhomogeneity of steel with a diameter of 25 mm should not be higher 3балла, correspond 26-50 mm diameter - not more than 5 points, and 51-70 mm in diameter - no more than 6 points. Steel comes with a standardized purity non-metallic inclusions should be as follows (in points): oxides of stroke is 3.5, oxides of point - 2,0, silicates fragile plastic and deformed - 0,5, sulfides and 1.0. |
