Categoria: | Fe-Ni-Cr | |||
---|---|---|---|---|
ACI/CAST GRADE |
HP | |||
CAST ASTM | A297 | |||
CAST EN/DIN | 1.4857 GX40NiCrSi35-25 | |||
CAST UNS | N08705 | |||
WROUGHT UNS |
– | |||
WROUGHT GRADE |
– | |||
CHEMICAL COMPOSITION (wt%, TYPICAL VALUES) | ||||
C | 0.40 | |||
Cr | 25.0 | |||
Ni | 35.0 | |||
Si | 1.8 | |||
Other | – | |||
CASTINGS MINIMUM MECHANICAL PROPERTIES (AT 20°C, UNLESS OTHERWISE SPECIFIED) | ||||
Rp0.2[MPa] | 235 | |||
Rm [MPa] | 430 | |||
A % | 4.5 | |||
Hardness [HB] | – | |||
Impact [J] | – | |||
CREEP LIMIT | ||||
Creep limit 1% 10.000 hours MPa at °C | ||||
600 | – | |||
700 | 60 | |||
800 | 40 | |||
900 | 25 | |||
1000 | 12 | |||
1100 | 2 | |||
Creep strength for 100.000 hours MPa at °C | ||||
600 | – | |||
700 | 60 | |||
800 | 38 | |||
900 | 22 | |||
1000 | 12 | |||
1100 | 2.5 | |||
PHYSICAL PROPERTIES (AT 20°C, UNLESS OTHERWISE SPECIFIED) | ||||
Microstructure | Austenitic, Carbides | |||
ρ [kg/dm3] | 8.0 | |||
α [μm/m∙K] (20 – 100 °C) | 20 | |||
K [W/m∙K] | 13 | |||
Cp [J/kg∙K] | 460 | |||
Melting ΔT [°C] | 1344 (L) | |||
WORKING CONDITIONS / FABRICATION | ||||
Heat Treatment | As Cast | |||
Max working T in air [°C] | 1100 | |||
Machining | – | |||
Patternmaker’s Shrinkage [%] | 2.3 |
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