Steel 36KH18N25S2 (4Х18Н25С2)
Designation
| Name |
The value |
| Designation GOST Cyrillic |
36Х18Н25С2 |
| Designation GOST Latin |
36X18H25C2 |
| Transliteration |
36H18N25S2 |
| The chemical elements |
36Cr18Н25С2 |
| Name |
The value |
| Designation GOST Cyrillic |
4Х18Н25С2 |
| Designation GOST Latin |
4X18H25C2 |
| Transliteration |
4H18N25S2 |
| The chemical elements |
4Cr18Н25С2 |
Description
36KH18N25S2 steel is used: for the manufacture of nozzle heads, parts, ovens, carburizing boxes, continuously operating at temperatures up to +1000 °C.
Note
Steel heat-resistant austenitic class.
The recommended maximum operating temperature for a long time +1000 °C. the Temperature of intensive scaling in air +1100 °C.
The steel is resistant to carburizing environments.
Standards
| Name |
Code |
Standards |
| Classification, nomenclature and general norms |
В30 |
GOST 5632-72 |
| Sectional and shaped rolling |
В32 |
GOST 5949-75, TU 14-11-245-88 |
| Bulls. Blanks. Slabs |
В31 |
OST 3-1686-90 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Cu |
V |
Ti |
Mo |
W |
| GOST 5632-72 |
0.32-0.4 |
≤0.02 |
≤0.035 |
≤1.5 |
17-19 |
2-3 |
23-26 |
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, % |
| Bars hot rolled and forged according to GOST 5949-75. Quenching in air, oil or water from 1000-1150 °C |
|
≥345 |
≥640 |
≥25 |
≥40 |
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 |
Physical characteristics
| Temperature |
Е, ГПа |
r, кг/м3 |
l, Вт/(м · °С) |
a, 10-6 1/°С |
| 20 |
200 |
7800 |
- |
- |
| 200 |
191 |
- |
- |
134 |
| 300 |
186 |
- |
- |
147 |
| 400 |
178 |
- |
- |
- |
| 500 |
171 |
- |
228 |
161 |
| 600 |
162 |
- |
255 |
- |
| 700 |
154 |
- |
263 |
- |
| 800 |
147 |
- |
374 |
- |
| 100 |
- |
- |
15 |
13 |
A description of the physical symbols
| Name |
Description |
| Е |
The normal elasticity modulus |
| r |
Density |
| l |
Coefficient of thermal conductivity |
| R |
UD. the resistivity |
