Steel 45KH14N14V2M (ЭИ69)
Designation
| Name |
The value |
| Designation GOST Cyrillic |
45Х14Н14В2М |
| Designation GOST Latin |
45X14H14B2M |
| Transliteration |
45H14N14V2M |
| The chemical elements |
45Cr14Н14W2Mo |
| Name |
The value |
| Designation GOST Cyrillic |
ЭИ69 |
| Designation GOST Latin |
EI69 |
| Transliteration |
EhI69 |
| The chemical elements |
- |
Description
45KH14N14V2M steel is used: for the production of parts of valves and piping, forgings, valves, motors, diesel engine parts and specialty fasteners to work for a long period of time at temperatures up to +600 °C for limited periods up to +650 °C; nitride parts of aviation.
Note
Steel complexly alloyed heat-resistant austenitic class.
The temperature of beginning of intensive scaling in air +850 °C.
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 |
| 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 14-1-1671-76, TU 14-1-2972-80, TU 14-1-3092-81, TU 14-1-3957-85, TU 14-11-245-88 |
| Classification, nomenclature and general norms |
В20 |
OST 1 90005-91 |
| Bulls. Blanks. Slabs |
В21 |
OST 1 90176-75 |
| Bulls. Blanks. Slabs |
В31 |
OST 3-1686-90 |
| Thermal and thermochemical treatment of metals |
В04 |
STP 26.260.484-2004, ST ЦКБА 016-2005 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Cu |
V |
Ti |
Mo |
W |
| TU 14-1-1671-76 |
0.4-0.5 |
≤0.02 |
≤0.03 |
≤0.7 |
13-15 |
≤0.8 |
13-15 |
The rest |
≤0.3 |
≤0.2 |
≤0.2 |
0.25-0.4 |
2-2.8 |
| GOST 5632-72 |
0.4-0.5 |
≤0.02 |
≤0.035 |
≤0.7 |
13-15 |
≤0.8 |
13-15 |
The rest |
≤0.3 |
≤0.2 |
≤0.2 |
0.25-0.4 |
2-2.8 |
Fe is the basis.
Mechanical characteristics
| Section, mm |
sT|s0,2, MPa |
σB, MPa |
d5, % |
y, % |
kJ/m2, кДж/м2 |
Brinell hardness number, MPa |
| Bars. Quenching in water from 1175 °C + Ageing at 750 °C (maintained for 5 h) |
| - |
≥375 |
≥775 |
≥37 |
≥49 |
- |
- |
| Long products (indicated by temperature and duration of heat exposure) |
| - |
≥400 |
≥840 |
- |
- |
- |
- |
| Gradation of performance properties of the finished heat-treated parts for OST 1 90005-91 |
| - |
- |
- |
- |
- |
- |
179-269 |
| Blank pieces of pipe fittings and welded assemblies at ST CKBA 016-2005. Quenching in water from 1170-1200 °C (1090-1110 or °C) (exposure: 0.5-1.0 C) + Aging at 730-770 °C (maintained for 5 h), air cooling |
|
≥294 |
≥686 |
≥20 |
≥35 |
≥490 |
170-270 |
| Bars. Quenching in water from 1175 °C + Ageing at 750 °C (maintained for 5 h) |
| - |
≥255 |
≥570 |
≥22 |
≥32 |
- |
- |
| Long products (indicated by temperature and duration of heat exposure) |
| - |
≥265 |
≥560 |
≥23 |
- |
- |
- |
| Bars hot rolled and forged GOST 5949-75, STP 26.260.484-2004. High vacation at 810-830 °C, air cooling |
|
≥315 |
≥710 |
≥20 |
≥35 |
- |
- |
| Bars. Quenching in water from 1175 °C + Ageing at 750 °C (maintained for 5 h) |
| - |
≥250 |
≥490 |
≥16 |
≥26 |
- |
- |
| Long products (indicated by temperature and duration of heat exposure) |
| - |
≥260 |
≥540 |
≥17 |
- |
- |
- |
| Forming at OST 1 90176-75. Annealing at 810-830 °C (aged for at least 5 hours), air cooling |
|
≥314 |
≥706 |
≥20 |
≥35 |
≥490 |
197-285 |
| Bars. Quenching in water from 1175 °C + Ageing at 750 °C (maintained for 5 h) |
| - |
≥235 |
≥435 |
≥13 |
≥25 |
- |
- |
| Long products (indicated by temperature and duration of heat exposure) |
| - |
≥245 |
≥410 |
≥16 |
- |
- |
- |
| Bars. Quenching in water from 1175 °C + Ageing at 750 °C (maintained for 5 h) |
| - |
≥215 |
≥340 |
≥11 |
≥22 |
- |
- |
| Long products (indicated by temperature and duration of heat exposure) |
| - |
≥280 |
≥405 |
≥16 |
≥30 |
- |
- |
| Bars. Quenching in water from 1175 °C + Ageing at 750 °C (maintained for 5 h) |
| - |
≥195 |
≥275 |
≥9 |
≥18 |
- |
- |
| Long products (indicated by temperature and duration of heat exposure) |
| - |
≥315 |
≥550 |
- |
≥19 |
- |
- |
| - |
≥305 |
≥610 |
- |
≥28 |
- |
- |
| - |
≥400 |
≥800 |
≥18 |
≥37 |
- |
- |
| - |
≥425 |
≥810 |
- |
≥33 |
- |
- |
| - |
≥260 |
≥485 |
≥20 |
≥46 |
- |
- |
| - |
≥265 |
≥465 |
≥19 |
≥44 |
- |
- |
| - |
≥255 |
≥390 |
≥17 |
≥39 |
- |
- |
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 |
208 |
8000 |
14 |
814 |
- |
- |
| 20 |
208 |
8000 |
14 |
815 |
- |
- |
| 100 |
196 |
- |
16 |
875 |
- |
- |
| 200 |
190 |
7830 |
17 |
945 |
17 |
- |
| 300 |
181 |
- |
19 |
1000 |
- |
507 |
| 400 |
173 |
7840 |
20 |
1055 |
17 |
511 |
| 500 |
166 |
- |
21 |
1098 |
- |
523 |
| 600 |
157 |
7760 |
22 |
1142 |
18 |
523 |
| 700 |
149 |
- |
24 |
1172 |
- |
- |
| 800 |
141 |
7660 |
- |
- |
18 |
528 |
| 1000 |
- |
- |
- |
- |
19 |
- |
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 |
Difficult weldability. The welding process - SMAW. To relieve welding stresses, the recommended subsequent heat treatment. |
| Forging temperature |
Start - 1160 °C, the end - 850 °C. the cross Sections up to 300 mm are cooled in stacks on the air. |
| Workability by cutting |
In the hardened state when NV 229-241 Kn TV.SPL.=0,7 Kn b.St.=0,25. |
| Features of heat treatment |
Steel products 45KH14N14V2M you can termoobrabotki in two modes: a) annealing - heating to 1110-1130 °C, exposure when the material thickness up to 15mm - 30 min, more than 15 mm - 30 min + 1 min per 1 mm of maximum thickness; cooling in water or air. Aging at 750 °C, exposure 6 h, air cooling; b) high vacation at 820±10 °C, exposure 6 h, air cooling. The first mode is preferable, since the plastic properties of the obtained products are higher. |
