Steel 01Н17К12М5Т (ЭП845; VCS-240)
Designation
| Name |
The value |
| Designation GOST Cyrillic |
01Н17К12М5Т |
| Designation GOST Latin |
01H17K12M5T |
| Transliteration |
01N17K12M5T |
| The chemical elements |
01Н17Co12Mo5Ti |
| Name |
The value |
| Designation GOST Cyrillic |
ЭП845 |
| Designation GOST Latin |
EP845 |
| Transliteration |
EhP845 |
| The chemical elements |
- |
| Name |
The value |
| Designation GOST Cyrillic |
ВКС-240 |
| Designation GOST Latin |
BKC-240 |
| Transliteration |
VKS-240 |
| The chemical elements |
WCoС-240 |
Description
01Н17К12М5Т steel is used: for the production of heavily loaded parts, special fasteners, bolts, axles, pins aircraft and space engineering.
Note
High-strength steel partenitskaya.
Standards
| Name |
Code |
Standards |
| Classification, nomenclature and general norms |
В20 |
OST 1 90005-91 |
| Bars |
В55 |
TU 14-1-1846-76 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Si |
Ni |
Fe |
Ti |
Mo |
Co |
| TU 14-1-1846-76 |
≤0.01 |
≤0.01 |
≤0.01 |
≤0.1 |
≤0.1 |
17-18 |
The rest |
1.1-1.3 |
4.5-5 |
11.5-12.5 |
Fe is the basis.
According to TU 14-1-1846-76 the chemical composition is presented for steel grade 01Н17К12М5Т-ИЛ (ЭП845-ИЛ) - steels of vacuum-induction smelting with the subsequent electron-beam remelting. Estimated content of modifiers and deoxidizers: magnesium, calcium, barium, hafnium and boron is established by technological instructions of the supplier of metal and their residual content in the metal is not determined by chemical analysis. Deviations in titanium by +0.10% are allowed; by nickel by +0.30%; for silicon and manganese, provided that their sum is not more than 0.20%, for carbon by +0.0050%. A residual chromium content of up to 0.30% is allowed.
Mechanical characteristics
| Section, mm |
σB, MPa |
y, % |
kJ/m2, кДж/м2 |
HRC |
| Gradation of performance properties of the finished heat-treated parts for OST 1 90005-91 |
| - |
2260-2450 |
- |
- |
55-58 |
| Round bars and hexagonal cross-section on the other 14-1-1846-76. Aging at 510-550 °C for 3 hours, air cooling |
|
≥2254 |
≥40 |
≥196 |
- |
Description mechanical marks
| Name |
Description |
| Section |
Section |
| σB |
Limit short-term strength |
| y |
The relative narrowing |
| kJ/m2 |
Toughness |
| HRC |
Rockwell hardness (indenter diamond spheroconical) |
Physical characteristics
| Temperature |
Е, ГПа |
G, ГПа |
r, кг/м3 |
l, Вт/(м · °С) |
a, 10-6 1/°С |
С, Дж/(кг · °С) |
| 0 |
198 |
81 |
7850 |
52 |
- |
- |
| 100 |
196 |
80 |
7828 |
51 |
122 |
- |
| 200 |
191 |
76 |
7798 |
49 |
13 |
470 |
| 300 |
186 |
73 |
7765 |
46 |
137 |
483 |
| 400 |
163 |
70 |
7725 |
43 |
143 |
- |
| 500 |
- |
66 |
7693 |
- |
147 |
521 |
| 600 |
- |
61 |
7653 |
- |
15 |
- |
| 700 |
- |
- |
7610 |
- |
152 |
571 |
| 800 |
- |
- |
7600 |
- |
127 |
- |
| 900 |
- |
- |
7550 |
- |
- |
- |
| 1000 |
- |
- |
- |
- |
124 |
- |
| 1200 |
- |
- |
- |
- |
134 |
- |
A description of the physical symbols
| Name |
Description |
| Е |
The normal elasticity modulus |
| l |
Coefficient of thermal conductivity |
Technological properties
| Name |
The value |
| Features of production |
Bars on the other 14-1-1846-76 are supplied without heat treatment. |
