Alloy Х25Н20 (ЭП74)
Designation
| Name |
The value |
| Designation GOST Cyrillic |
Х25Н20 |
| Designation GOST Latin |
X25H20 |
| Transliteration |
H25N20 |
| The chemical elements |
Cr25Ni20 |
| Name |
The value |
| Designation GOST Cyrillic |
ЭП74 |
| Designation GOST Latin |
EP74 |
| Transliteration |
EhP74 |
| The chemical elements |
- |
Description
Alloy Х25Н20 used: for the manufacture of wire for industrial and laboratory furnaces, household appliances; elastic sensing elements, operating at temperatures up to 950 °C.
Standards
| Name |
Code |
Standards |
| Tapes |
В34 |
GOST 12766-67 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Ti |
Zr |
| GOST 12766-67 |
≤0.15 |
≤0.02 |
≤0.03 |
≤2 |
24-27 |
≤1 |
17-20 |
The rest |
≤0.3 |
≤0.5 |
Fe is the basis.
According to GOST 12766-67 the chemical composition is given for the alloy grade X25N20. The presence in the alloy of residual rare-earth elements, as well as barium and calcium, is not a defective feature.
Physical characteristics
| Temperature |
R, НОм · м |
| 20 |
830-960 |
A description of the physical symbols
| Name |
Description |
| R |
UD. the resistivity |
Technological properties
| Name |
The value |
| Окалиностойкость, heat resistance |
Onlinetony alloy in an oxidizing atmosphere, hydrogen, vacuum; unstable in an atmosphere containing sulfur and sulfur compounds; more heat resistant than khro-melaminovye alloys. |
| Operating temperature |
The working temperature of heating element: Optimal 900 °C, maximum 1000 °C. |
