Heat-resistant steel X10CrAl24, X10CrAlSi25, 1.4762 with ferritic structure resistant to oxidation to the temperature of 1150℃ according to EN 10095, EN 10088-1, SEW 470.
| Standard | Steel Grade | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Chemical Composition % | ||||||||||
| C: | Mn: | Si: | P: | S: | Cr: | Ni: | Al: | Cu: | N: | |
| PN | H24JS | |||||||||
| <0.12 | <1.0 | 1.3 - 1.6 | <0.045 | <0.030 | 23.0 - 25.0 | <0.5 | 1.3 - 1.6 | - | - | |
| SEW 470 | X10CrAl24 - X 10 CrAl 24 | |||||||||
| <0.12 | <1.0 | 0.7 - 1.4 | <0.040 | <0.015 | 23.0 - 26.0 | - | 1.2 - 1.7 | - | - | |
| EN | X10CrAlSi25 - X 10 CrAlSi 25 - 1.4762 | |||||||||
| <0.12 | <1.0 | 0.7 - 1.4 | <0.040 | <0.015 | 23.0 - 26.0 | - | 1.2 - 1.7 | - | - | |
| ASTM | UNS S44600 - AISI 446 | |||||||||
| <0.2 | <1.5 | <1.0 | <0.040 | <0.030 | 23.0 - 27.0 | <0.75 | - | - | <0.25 | |
| JIS | SUH 446 - SUH446 | |||||||||
| <0.2 | <1.5 | <1.0 | <0.040 | <0.030 | 23.0 - 27.0 | <0.6 | - | <0.3 | <0.25 | |
| AF | Z10CAS24 - Z 10 CAS 24 | |||||||||
| <0.12 | <1.0 | 0.5 - 1.5 | <0.040 | <0.030 | 23.0 - 26.0 | - | 1.20 - 1.70 | - | - | |
| AF | Z12CAS25 - Z 12 CAS 25 | |||||||||
| <0.12 | <0.75 | 0.7 - 1.4 | <0.035 | <0.015 | 23.0 - 26.0 | - | 1.2 - 1.7 | - | - | |
X10CrAl24, X10CrAlSi25, 1.4762 - chemical composition and use
X10CrAlSi25 / 1.4762 is currently the most frequently used substitute for the H24JS ferritic grade. In addition to high temperatures, steel exhibits resistance to environments containing Sulfur compounds and reducing gases, and dimensional stability as opposed to nickel-containing austenitic grades.
The ferritic structure, unfortunately, significantly reduces creep resistance, shapeability, weldability, and at the same time increases the thermal conductivity of the material and brittleness at high temperatures.
The H24JS grade is the right choice for components and subassemblies working in high temperatures, difficult environments, without significant loads. The main application of the products are parts of plastic mass driers, parts of steam boilers and industrial furnaces, guiding rails, covers or supports for steam heaters.
Mechanical and physical properties of X10CrAl25, X10CrAlSi24, 1.4762 steel according to EN 10095
- Tensile strength, Rm: 520 - 720 MPa
- The yield point, Re: > 280 MPa
- Elongation, A:> 10%
- Hardness, HB: <223
- Specific resistance, Ω: 1.1 mkOhm*m
- Thermal capacity, cp20-100℃: 500 J * kg-1 * K-1
- Thermal conductivity, λ: 17,0 W * m-1 * K-1
- Linear expansion coefficient, α20-100℃: 10.5 - 13.5 * 10-6 K-1
Mechanical properties at elevated temperatures
| Properties (MPa) | Temperature (℃) | ||||||
|---|---|---|---|---|---|---|---|
| 500 | 600 | 700 | 800 | 900 | 1000 | 1100 | |
| Creep strength, Rz/1000 | 160 | 55 | 17 | 7.5 | 3.6 | - | - |
| Creep strength, Rz/10000 | 100 | 35 | 9.5 | 4.3 | 1.9 | - | - |
| Creep strength, Rz/100000 | 55 | 20 | 5 | 2.3 | 1 | - | - |
| Creep limit, R1/1000 | 80 | 27.5 | 8.5 | 3.7 | 1.8 | 0.7 | 0.3 |
| Creep limit, R1/10000 | 50 | 17.5 | 4.7 | 2.1 | 1 | - | - |
Heat and plastic treatment of X10CrAlSi25, X10CrAl24, 1.4762, H24JS steel
- +A condition, annealing at a temperature of 800 - 860℃ with cooling in air or water
- Rolling and forging at a temperature of 1050 - 600 ℃
In the above-mentioned grades we deliver:
- Heat-resistant peeled and drawn bars H24JS, X10CrAl25, X10CrAlSi24, 1.4762
- Forgings and forged bars H24JS, X10CrAlSi25, X10CrAl24, 1.4762
- Heat-resistant pipes and tubes H24JS, X10CrAlSi25, X10CrAl24, 1.4762
- Heat-resistant plates and sheets H24JS, X10CrAlSi25, X10CrAl24, 1.4762
Substitutes of the grade:
H24JS, X10CrAlSi25, X 10 CrAlSi 25, X10CrAl24, X 10 CrAl 24, 1.4762, AISI 446, UNS S44600, Z10CAS24, Z 10 CAS 24, X25Al, SUH446, STR 446, 10AlCr240, 10 AlCr 240, H14, Z12CAS25, Z 12 CAS 25, 16Cr25N.