Steel 20Х23Н13 (ЭИ319)
Designation
| Name |
The value |
| Designation GOST Cyrillic |
20Х23Н13 |
| Designation GOST Latin |
20X23H13 |
| Transliteration |
20H23N13 |
| The chemical elements |
20Cr23Н13 |
| Name |
The value |
| Designation GOST Cyrillic |
ЭИ319 |
| Designation GOST Latin |
EI319 |
| Transliteration |
EhI319 |
| The chemical elements |
- |
Description
20Х23Н13 steel is used: for the manufacture of parts operating at high temperatures in lightly; pipes for pyrolysis of methane and pyrometric pipes.
Note
Steel heat-resistant autentico-ferritic class.
The recommended maximum operating temperature for a long time +1000 °C. the Temperature of intensive scaling in air +1050 °C.
In the temperature range 600−800 °C is prone to embrittlement due to the formation of σ-phase.
Standards
| Name |
Code |
Standards |
| Sectional and shaped rolling |
В22 |
GOST 1133-71, GOST 2590-2006, GOST 2591-2006, GOST 2879-2006 |
| Sheets and stripes |
В23 |
GOST 19903-74, GOST 19904-90, GOST 103-2006, GOST 19903-90 |
| Sheets and stripes |
В33 |
GOST 4405-75, GOST 5582-75, GOST 7350-77 |
| 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 |
| Bulls. Blanks. Slabs |
В31 |
OST 3-1686-90 |
| Thermal and thermochemical treatment of metals |
В04 |
STP 26.260.484-2004 |
| Metal forming. Forgings |
В03 |
TU 14-1-1530-75 |
| Castings with special properties (cast iron and steel) |
В83 |
TU 14-1-956-74 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Cu |
V |
Ti |
Mo |
W |
| GOST 5632-72 |
≤0.2 |
≤0.025 |
≤0.035 |
≤2 |
22-25 |
≤1 |
12-15 |
The rest |
≤0.3 |
≤0.2 |
≤0.2 |
≤0.3 |
≤0.2 |
Fe is the basis.
Mechanical characteristics
| Section, mm |
sT|s0,2, MPa |
σB, MPa |
d5, % |
y, % |
kJ/m2, кДж/м2 |
| Hot rolled sheet (of 1.5-3.9 mm) and cold rolled (0,7-3,9 mm) steel according to GOST 5582-75. Quenching in water or air from 1100-1150 °C |
|
- |
≥540 |
≥35 |
- |
- |
| Rolled steel. Quenching in water from 1050 °C |
| - |
≥360 |
≥650 |
≥39 |
≥60 |
≥206 |
| Hot rolled sheet (4,0-25,0 mm) and cold rolled (4,0-5,0 mm) steel according to GOST 7350-77. Quenching in water from 1030-1120 °C |
|
- |
≥570 |
≥35 |
- |
- |
| Rolled steel. Quenching in water from 1050 °C |
| - |
≥300 |
≥580 |
≥28 |
≥60 |
≥294 |
| Bars hot rolled and forged according to GOST 5949-75. Quenching in air, oil or water from 1100-1150 °C |
|
≥295 |
≥490 |
≥35 |
≥50 |
- |
| Rolled steel. Quenching in water from 1050 °C |
| - |
≥280 |
≥520 |
≥29 |
≥64 |
≥294 |
| Bars hot rolled and forged at STP 26.260.484-2004. Quenching in water or air from 1100-1150 °C |
|
≥300 |
≥500 |
≥35 |
≥50 |
≥588 |
| Rolled steel. Quenching in water from 1050 °C |
| - |
≥260 |
≥465 |
≥31 |
≥62 |
≥294 |
| - |
≥215 |
≥475 |
≥35 |
≥57 |
≥294 |
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) |
a, 10-6 1/°С |
С, Дж/(кг · °С) |
| 0 |
207 |
7820 |
- |
- |
- |
| 20 |
207 |
7820 |
- |
- |
- |
| 100 |
- |
7890 |
- |
149 |
538 |
| 600 |
- |
7580 |
24 |
178 |
- |
| 800 |
- |
7480 |
29 |
- |
- |
| 200 |
- |
- |
17 |
157 |
- |
| 300 |
- |
- |
19 |
166 |
538 |
| 400 |
- |
- |
21 |
171 |
- |
| 500 |
- |
- |
23 |
175 |
- |
| 700 |
- |
- |
27 |
178 |
- |
| 900 |
- |
- |
31 |
182 |
- |
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 |
limited weldability. Welding methods: SMAW, electrodes OzL-6, CL-25. |
| Propensity to temper brittleness |
inclined in the range of 600-800 °C due to the formation of b-phase |
| 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 to eliminate the tendency to intergranular corrosion are subjected to hardening regime: heating up to 1100-1150 °C, exposure during heating for quenching for products with wall thickness up to 10 mm - 30 min, over 10 mm — 20 min + 1 min per 1 mm max thickness cooling in water or air. Products austenite-ferritic steels do not require heat treatment after welding. |
