Categoria: | Fe-Cr-Ni | |||
---|---|---|---|---|
ACI/CAST GRADE |
253MA® | |||
CAST ASTM | – | |||
CAST EN/DIN | 1.4893 X8CrNiN | |||
CAST UNS | – | |||
WROUGHT UNS |
– | |||
WROUGHT GRADE |
253MA® | |||
CHEMICAL COMPOSITION (wt%, TYPICAL VALUES) | ||||
C | <0.20 | |||
Cr | 21.0 | |||
Ni | 11.0 | |||
Si | 1.7 | |||
Other | Ce | |||
CASTINGS MINIMUM MECHANICAL PROPERTIES (AT 20°C, UNLESS OTHERWISE SPECIFIED) | ||||
Rp0.2[MPa] | 260 | |||
Rm [MPa] | 530 | |||
A % | 10 | |||
Hardness [HB] | – | |||
Impact [J] | – | |||
CREEP LIMIT | ||||
Creep limit 1% 10.000 hours MPa at °C | ||||
600 | – | |||
700 | 55 | |||
800 | 28 | |||
900 | 16 | |||
1000 | 7 | |||
1100 | 1.5 | |||
Creep strength for 100.000 hours MPa at °C | ||||
600 | – | |||
700 | 50 | |||
800 | 26 | |||
900 | 14 | |||
1000 | 6 | |||
1100 | – | |||
PHYSICAL PROPERTIES (AT 20°C, UNLESS OTHERWISE SPECIFIED) | ||||
Microstructure | Austenitic, Carbides | |||
ρ [kg/dm3] | 7.75 | |||
α [μm/m∙K] (20 – 100 °C) | – | |||
K [W/m∙K] | – | |||
Cp [J/kg∙K] | – | |||
Melting ΔT [°C] | – | |||
WORKING CONDITIONS / FABRICATION | ||||
Heat Treatment | As Cast | |||
Max working T in air [°C] | 1150 | |||
Machining | – | |||
Patternmaker’s Shrinkage [%] | 2.4 |
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