Categoria: | Fe-Cr-Ni | |||
---|---|---|---|---|
ACI/CAST GRADE |
HE | |||
CAST ASTM | A297 | |||
CAST EN/DIN | – | |||
CAST UNS | J93403 | |||
WROUGHT UNS |
– | |||
WROUGHT GRADE |
AISI 312 | |||
CHEMICAL COMPOSITION (wt%, TYPICAL VALUES) | ||||
C | 0.35 | |||
Cr | 28.0 | |||
Ni | 9.0 | |||
Si | 1.8 | |||
Other | – | |||
CASTINGS MINIMUM MECHANICAL PROPERTIES (AT 20°C, UNLESS OTHERWISE SPECIFIED) | ||||
Rp0.2[MPa] | 275 | |||
Rm [MPa] | 585 | |||
A % | 9 | |||
Hardness [HB] | – | |||
Impact [J] | – | |||
CREEP LIMIT | ||||
Creep limit 1% 10.000 hours MPa at °C | ||||
600 | – | |||
700 | – | |||
800 | – | |||
900 | – | |||
1000 | – | |||
1100 | – | |||
Creep strength for 100.000 hours MPa at °C | ||||
600 | ||||
700 | – | |||
800 | – | |||
900 | – | |||
1000 | – | |||
1100 | – | |||
PHYSICAL PROPERTIES (AT 20°C, UNLESS OTHERWISE SPECIFIED) | ||||
Microstructure | Austenite, Ferrite, Carbides | |||
ρ [kg/dm3] | 7.67 | |||
α [μm/m∙K] (20 – 100 °C) | 17.3 | |||
K [W/m∙K] | 14.7 | |||
Cp [J/kg∙K] | 580 | |||
Melting ΔT [°C] | 1454 | |||
WORKING CONDITIONS / FABRICATION | ||||
Heat Treatment | As Cast | |||
Max working T in air [°C] | 1050 | |||
Machining | ||||
Patternmaker’s Shrinkage [%] | 2.3 |
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