Steel 08KH17T (ЭИ645)
Designation
| Name |
The value |
| Designation GOST Cyrillic |
08Х17Т |
| Designation GOST Latin |
08X17T |
| Transliteration |
08H17T |
| The chemical elements |
08Cr17Ti |
| Name |
The value |
| Designation GOST Cyrillic |
ЭИ645 |
| Designation GOST Latin |
EI645 |
| Transliteration |
EhI645 |
| The chemical elements |
- |
Description
Steel 08KH17T used: for the production of chemical equipment; products, operating in oxidizing environments and at atmospheric conditions, in addition to marine atmosphere, in which pitting corrosion; heat exchangers, pipes; welded structures, not exposed to shock loads and operate at temperatures below -20 °C; food processing equipment, Breweries, soap and light industries; as a cladding layer in the manufacture of hot-rolled dual-layer corrosion-resistant sheets.
Note
Steel heat-resistant, corrosion-resistant ferritic class.
Temperature intense scaling in air +900 °C.
Steel 08KH17T used as a substitute for steel 12KH18N9T and 12KH18N10T, for the same purpose as the steel 12X17, including for welded structures.
Standards
| Name |
Code |
Standards |
| Sheets and stripes |
В23 |
GOST 103-2006 |
| Sectional and shaped rolling |
В22 |
GOST 1133-71, GOST 2590-2006, GOST 2591-2006, GOST 2879-2006 |
| Sheets and stripes |
В33 |
GOST 4405-75, GOST 5582-75, GOST 7350-77, GOST 10885-85, TU 14-1-4780-90 |
| Classification, nomenclature and general norms |
В30 |
GOST 5632-72 |
| Sectional and shaped rolling |
В32 |
GOST 5949-75, GOST 7417-75, GOST 8559-75, GOST 8560-78, GOST 14955-77, TU 14-11-245-88, TU 14-1-1271-75 |
| Pipes steel and connecting parts to them |
В62 |
GOST 9940-81, GOST 9941-81, TU 14-3-1654-89 |
| Bulls. Blanks. Slabs |
В31 |
OST 3-1686-90 |
| Thermal and thermochemical treatment of metals |
В04 |
STP 26.260.484-2004 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Cu |
V |
Ti |
Mo |
W |
| GOST 5632-72 |
≤0.08 |
≤0.025 |
≤0.035 |
≤0.8 |
16-18 |
≤0.8 |
≤0.6 |
The rest |
≤0.3 |
≤0.2 |
0.4-0.8 |
≤0.3 |
≤0.2 |
Fe is the basis.
Mechanical characteristics
| Section, mm |
sT|s0,2, MPa |
σB, MPa |
d5, % |
y, % |
kJ/m2, кДж/м2 |
| Seamless hot deformed tubes in the delivery condition |
|
- |
≥372 |
≥17 |
- |
- |
| Hot rolled sheet (of 1.5-3.9 mm) and cold rolled (0,7-3,9 mm) steel according to GOST 5582-75. Annealing or vacation at 740-780 °C |
| - |
- |
≥460 |
≥20 |
- |
- |
| Rolled steel. Heating to 760 °C, air cooling |
| - |
- |
≥460 |
≥30 |
- |
- |
| Hot rolled sheet (of 1.5-3.9 mm) and cold rolled (0,7-3,9 mm) steel according to GOST 5582-75. Annealing at 830-860 °C, air cooling or Normalizing at 960-1000 °C, air cooling |
| - |
- |
≥460 |
≥30 |
- |
- |
| Rolled steel. Heating to 760 °C, air cooling |
| - |
- |
≥59 |
≥111 |
- |
- |
| Hot rolled sheet (4,0-25,0 mm) and cold rolled (4,0-5,0 mm) steel according to GOST 7350-77. Annealing or vacation at 760-780 °C, air cooling |
| - |
- |
≥440 |
≥18 |
- |
- |
| Rolled steel. Heating to 760 °C, air cooling |
| - |
- |
≥59 |
≥90 |
- |
- |
| Bars hot rolled and forged at STP 26.260.484-2004. Annealing at 760-780 °C, cooling in water |
|
≥250 |
≥450 |
≥18 |
≥45 |
≥490 |
| Rolled steel. Heating to 760 °C, air cooling |
| - |
- |
≥78 |
≥54 |
- |
- |
| - |
- |
≥155 |
≥37 |
- |
- |
| Tubes seamless cold - and warm. Annealing at 760-780°C, air cooling |
|
≥300 |
≥500 |
≥20 |
≥45 |
- |
| Rolled steel. Heating to 760 °C, air cooling |
| - |
- |
≥195 |
≥36 |
- |
- |
| - |
- |
≥245 |
≥35 |
- |
- |
| - |
- |
≥280 |
≥33 |
- |
- |
| - |
- |
≥330 |
≥32 |
- |
- |
| - |
- |
≥390 |
≥31 |
- |
- |
| - |
- |
≥59 |
≥110 |
- |
- |
Description mechanical marks
| Name |
Description |
| Section |
Section |
| sT|s0,2 |
Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2% |
| σB |
Limit short-term strength |
| d5 |
Elongation after rupture |
| y |
The relative narrowing |
| kJ/m2 |
Toughness |
Physical characteristics
| Temperature |
Е, ГПа |
r, кг/м3 |
l, Вт/(м · °С) |
R, НОм · м |
a, 10-6 1/°С |
С, Дж/(кг · °С) |
| 0 |
206 |
7700 |
25 |
600 |
- |
- |
| 20 |
206 |
7700 |
25 |
600 |
- |
- |
| 100 |
- |
- |
- |
- |
10 |
462 |
| 200 |
- |
- |
- |
- |
10 |
- |
| 300 |
- |
- |
- |
- |
105 |
462 |
| 400 |
- |
- |
- |
- |
105 |
- |
| 500 |
- |
- |
- |
- |
105 |
- |
| 700 |
- |
- |
- |
- |
11 |
- |
A description of the physical symbols
| Name |
Description |
| Е |
The normal elasticity modulus |
| r |
Density |
| l |
Coefficient of thermal conductivity |
| R |
UD. the resistivity |
Technological properties
| Name |
The value |
| Weldability |
Ogranichennaya steel. Satisfactory mechanical properties can be obtained in welding articles having a thickness up to 2-3 mm. For automatic arc welding under flux an-26 and ANF-14 used wire SV-08Х20Н9Г7Т SV-05Х25Н12ТЮ. |
| Propensity to temper brittleness |
inclined at a temperature of 475 °C during long exposures. |
| Forging temperature |
Beginning - 1220 °C, the end of - 900 °C. the cross Sections up to 350 mm cooled in air. |
| Features of heat treatment |
Steel products ferritic to eliminate the tendency to intergranular corrosion and maximum plasticity should be heated to 760-780 °C, aging at the rate of 30 min + 1 min per 1 mm maximum material thickness, cooling in water. Weldment from steel 08KH17T should be subjected to annealing at 720-780 °C for 1-2 h, air cooling. Not allowed to leave the products at 450-550 °C, since this leads to the "475 ° embrittlement". |
