Alloy KH23JU5 (ЭИ595)
Designation
| Name |
The value |
| Designation GOST Cyrillic |
Х23Ю5 |
| Designation GOST Latin |
X23Ju5 |
| Transliteration |
H23Yu5 |
| The chemical elements |
Cr23Al5 |
| Name |
The value |
| Designation GOST Cyrillic |
ЭИ595 |
| Designation GOST Latin |
EI595 |
| Transliteration |
EhI595 |
| The chemical elements |
- |
Description
Alloy KH23JU5 used: for the manufacture of wire and strip for industrial and laboratory furnaces, appliances and apparatus, rheostats, and glow plugs; resistive elements; electric heating devices; resistance elements.
Note
The heat resisting alloy in an oxidizing atmosphere containing sulfur and sulfur compounds, working with high-alumina ceramics; prone to sagging at elevated temperatures, can not withstand sudden dynamic loads.
Standards
| Name |
Code |
Standards |
| Classification, nomenclature and general norms |
В30 |
GOST 10994-74 |
| Steel alloy wire |
В73 |
GOST 12766.1-90, TU 14-1-1380-75, TU 14-131-820-90 |
| Tapes |
В34 |
GOST 12766.2-90, GOST 12766-67 |
| Sectional and shaped rolling |
В32 |
GOST 12766.3-90, GOST 12766.4-90, TU 14-11-245-88 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Al |
Ti |
Ca |
Ce |
Zr |
| GOST 10994-74 |
≤0.05 |
≤0.015 |
≤0.02 |
≤0.3 |
21.5-23.5 |
≤0.6 |
≤0.6 |
The rest |
4.6-5.3 |
0.15-0.4 |
≤0.1 |
≤0.1 |
0.1 |
| GOST 12766-67 |
≤0.06 |
≤0.02 |
≤0.025 |
≤0.5 |
21.5-24.5 |
≤0.7 |
≤0.6 |
The rest |
4.5-5.5 |
≤0.3 |
- |
- |
≤0.5 |
Fe is the basis.
According to GOST 10994-74 the chemical composition is presented for the alloy X23S5. In accordance with GOST 10994-74, the content of calcium and cerium is calculated. When smelting an alloy intended for the production of heating elements, fresh charge materials should be used. Waste of own marks may be used.
According to GOST 12766-67, the chemical composition is given for the alloy grade X23Y5. The presence in the alloy of residual rare-earth elements, as well as barium and calcium, is not a defective feature.
Mechanical characteristics
| Section, mm |
sT|s0,2, MPa |
σB, MPa |
d5, % |
d |
y, % |
Brinell hardness number, MPa |
| Cold-rolled steel strip of 0.2-3.2 mm in the delivery state according to GOST 12766.2-90 |
|
- |
≤736 |
≥14 |
- |
- |
180-250 |
| The mechanical properties of the alloy at short-term burst tests according to GOST 12766-67. Quenching in water from 760 °C (exposure 30 minutes) |
| - |
≥540 |
≥647 |
- |
≥23 |
≥72 |
- |
| Wire cold-drawn heat-treated in the delivery condition according to GOST 12766.1-90 (the value is δ200) |
|
- |
≤740 |
- |
≥12 |
- |
- |
| The mechanical properties of the alloy at short-term burst tests according to GOST 12766-67. Quenching in water from 760 °C (exposure 30 minutes) |
| - |
≥431 |
≥608 |
- |
≥16 |
≥53 |
- |
| - |
≥353 |
≥373 |
- |
≥30 |
≥79 |
- |
| - |
- |
≥118 |
- |
≥58 |
≥94 |
- |
| - |
- |
≥16.67 |
- |
≥122 |
≥96 |
- |
| - |
- |
≥8.83 |
- |
- |
- |
- |
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 |
| d |
Elongation after rupture |
| y |
The relative narrowing |
Physical characteristics
| Temperature |
r, кг/м3 |
R, НОм · м |
a, 10-6 1/°С |
С, Дж/(кг · °С) |
| 20 |
7250 |
1300-1400 |
- |
480 |
| 1000 |
- |
- |
15 |
- |
| 1200 |
- |
- |
174 |
- |
A description of the physical symbols
| Name |
Description |
| Е |
The normal elasticity modulus |
| r |
Density |
| l |
Coefficient of thermal conductivity |
| R |
UD. the resistivity |
| С |
Specific heat |
Technological properties
| Name |
The value |
| Microstructure |
Ferritic structure. |
| Features of heat treatment |
After heat treatment of cold drawn wire mode: holding at 750 °C 30 min., cooling with the furnace to 150 °C, 48 h exposure, the value of temperature coefficient of electrical resistance of the AU in the temperature range from 20 to 100 °C is equal to 0,2·10-4 1/°C. |
| Magnetic properties |
Magnetic alloy. |
| Окалиностойкость, heat resistance |
Onlinetony alloy in an oxidizing atmosphere and in the atmosphere containing sulfur and sulfur compounds; is prone to sagging at high temperatures. |
| Operating temperature |
The working temperature of heating element: Optimal 1150 °C, the limit of 1200 °C. |
| Vitality |
Survivability at a temperature of 1250 °C for at least 80 hours. |
| Vitality of the alloy for heating elements |
At least 80 hours at a test temperature of 1250 °C. the recommended maximum operating temperature of the heating element from 950 °C at a thickness of 0.2 mm to 1200 °C thickness ≥ 6.0 mm. |
