Designation by Standards
| Steel No. | DIN | EN | AISI | JIS | ГОСТ |
| 1.4742 | X10CrAl18 † | X10CrAlSi18 | - | SUS21 | 15Ch18SJu |
Chemical Composition (in weight %)
| C | Si | Mn | Cr | Mo | Ni | V | W | Others |
| max. 0.12 | 1.05 | max. 1.00 | 18.00 | - | - | - | - | Al=0.95 |
Description
Heat resistant steel for temperatures up to 1000oC, exposed to lower mechanical stressed structural parts.
Applications
Furnance fittings, conveying parts, components for thermal boilers, etc.
Physical properties (avarage values) at ambient temperature
Modulus of elasticity [103 x N/mm2]: Approx. 200
Density [g/cm3]: Approx. 7.7
Thermal conductivity [W/m.K]: 19.0
Electric resistivity [Ohm mm2/m]: 0.95
Specific heat capacity[J/g.K]: 0.45
Magnetisable: Yes
Coefficient of Linear Thermal Expansion 10-6 oC-1
| 20-200oC | 20-400oC | 20-600oC | 20-800oC | 20-1000oC |
| 13.0 | 13.5 | 14.5 | 15.0 | 15.5 |
Annealing
Heat to 800-850oC.
Mechanical properties at at ambient temperature
Condition: Annealed
Hardness: max. 212 HB
0.2% proof stress: 270 N/mm2
Tensile strength: 500-700 N/mm2
Elongation: min. 12%
1% Creep Stress Limit in N/mm2 vs. Temperature in oC
| 600oC | 700oC | 800oC | 900oC | 1000oC |
| 27.5 | 8.5 | 3.7 | 1.8 | 0.7 |
Forging
Hot forming temperature: 1100-800oC.
Machinability
No data.
Remark
All technical information is for reference only.