Alloy KHN20JUS (ЭК11)
Designation
| Name |
The value |
| Designation GOST Cyrillic |
ХН20ЮС |
| Designation GOST Latin |
XH20JuC |
| Transliteration |
HN20YuS |
| The chemical elements |
CrNi20AlPb |
| Name |
The value |
| Designation GOST Cyrillic |
ЭК11 |
| Designation GOST Latin |
EK11 |
| Transliteration |
EhK11 |
| The chemical elements |
- |
Description
Alloy KHN20JUS used: for the manufacture of heaters, industrial electric furnaces and various electric heating devices with maximum operating temperatures up to +1100 °C.
Note
The heat resisting alloy in an oxidizing atmosphere, a vacuum. More heat resistant than Fe-alloys.
Standards
| Name |
Code |
Standards |
| Classification, nomenclature and general norms |
В30 |
GOST 10994-74 |
| Steel alloy wire |
В73 |
GOST 12766.1-90, TU 14-1-4098-86 |
| Tapes |
В34 |
GOST 12766.2-90 |
| Sectional and shaped rolling |
В32 |
GOST 12766.3-90, GOST 12766.4-90, TU 14-11-245-88 |
| Bulls. Blanks. Slabs |
В31 |
TU 14-1-1213-75 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
N |
Al |
Ti |
Ca |
Ce |
Zr |
| TU 14-1-1213-75 |
≤0.12 |
≤0.02 |
≤0.03 |
0.3-0.85 |
19-21 |
2-2.7 |
19.5-21.5 |
The rest |
- |
1-1.5 |
- |
- |
- |
- |
| GOST 10994-74 |
≤0.08 |
≤0.02 |
≤0.03 |
0.3-0.8 |
19-21 |
2-2.7 |
19.5-21.5 |
The rest |
≤0.15 |
1-1.5 |
≤0.2 |
≤0.1 |
≤0.1 |
≤0.2 |
Fe is the basis.
According to GOST 10994-74, the chemical composition is given for an alloy of grade ХН20ЮС. The content of zirconium, cerium and calcium is calculated.
According to TU 14-1-1213-75, the chemical composition is given for an alloy of grade ХН20ЮС (ЭК11). In the alloy of calcium and cerium are introduced by calculation as technological additives of 0.10% each and chemical analysis is not determined. The presence in the metal of a residual amount of other rare earth elements and zirconium is not a rejection sign. When melting alloy XH20YC in arc furnaces, deviations from the mass fraction of nickel by + 0.050%, aluminum by ± 0.20% are allowed.
Mechanical characteristics
| Section, mm |
σB, MPa |
d5, % |
d |
| Cold-rolled steel strip of 0.2-3.2 mm in the delivery state according to GOST 12766.2-90 |
|
≤736 |
≥25 |
- |
| Wire cold-drawn heat-treated in the delivery condition according to GOST 12766.1-90 (the value is δ200) |
|
≤780 |
- |
≥25 |
Description mechanical marks
| Name |
Description |
| Section |
Section |
| σB |
Limit short-term strength |
| d5 |
Elongation after rupture |
| d |
Elongation after rupture |
Physical characteristics
| Temperature |
r, кг/м3 |
R, НОм · м |
a, 10-6 1/°С |
С, Дж/(кг · °С) |
| 20 |
7700 |
990-1070 |
- |
480 |
| 1000 |
- |
- |
19 |
- |
| 800 |
- |
- |
- |
640 |
A description of the physical symbols
| Name |
Description |
| Е |
The normal elasticity modulus |
| l |
Coefficient of thermal conductivity |
| R |
UD. the resistivity |
| С |
Specific heat |
Technological properties
| Name |
The value |
| Microstructure |
Austenitic structure with a mass fraction up to 3% of ferrite. |
| Magnetic properties |
Non-magnetic alloy. In the presence of ferrite alloy subfertility. |
| Operating temperature |
Recommended maximum working temperature of the heating element from 900 °C at a thickness of 0.2 mm to 1100 °C at a thickness ≥ 6.0 mm. |
| Vitality |
Survivability at a temperature of 1150 °C is not less than 100 hours. |
