Steel 01Н17К12М5Т (ЭП845; VCS-240)

Designation

Name The value
Designation GOST Cyrillic 01Н17К12М5Т
Designation GOST Latin 01H17K12M5T
Transliteration 01N17K12M5T
By chemical elements 01Н17Co12Mo5Ti
Name The value
Designation GOST Cyrillic ЭП845
Designation GOST Latin EP845
Transliteration EhP845
By chemical elements -
Name The value
Designation GOST Cyrillic ВКС-240
Designation GOST Latin BKC-240
Transliteration VKS-240
By 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 rules 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 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 properties

Section, mm σU, MPa y, % KCU, kJ/m2 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
σU Limit short-term strength
y The relative narrowing
KCU Toughness
HRC Rockwell hardness (indenter diamond spheroconical)

Physical characteristics

Temperature Е, HPa G, HPa r, kg/m3 l, W/(m · °C) a, 10-6 1/°C С, J/(kg · °C)
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
Particularities of production of goods Bars on the other 14-1-1846-76 are supplied without heat treatment.