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HP

ACI/CAST
GRADE
CAST ASTM CAST EN/DIN CAST UNS WROUGHT
UNS
WROUGHT
GRADE
HP A297 1.4857 GX40NiCrSi35-25 N08705 - -
CHEMICAL COMPOSITION (wt%, TYPICAL VALUES)
C Cr Ni Si Other
0.40 25.0 35.0 1.8 -
CASTINGS MINIMUM MECHANICAL PROPERTIES (AT 20°C, UNLESS OTHERWISE SPECIFIED)
Rp0.2[MPa] Rm [MPa] A % Hardness [HB] Impact [J]
235 430 4.5 - -
CREEP LIMIT
Creep limit 1% 10.000 hours MPa at °C Creep strength for 100.000 hours MPa at °C
600 700 800 900 1000 1100 600 700 800 900 1000 1100
- 60 40 25 12 2 - 60 38 22 12 2.5
PHYSICAL PROPERTIES (AT 20°C, UNLESS OTHERWISE SPECIFIED)
Microstructure ρ [kg/dm3] α [μm/m∙K] (20 - 100 °C) K [W/m∙K] Cp [J/kg∙K] Melting ΔT [°C]
Austenitic, Carbides 8.0 20 13 460 1344 (L)
WORKING CONDITIONS / FABRICATION
Heat Treatment Max working T in air [°C] Machinability [100 = CF8M] Patternmaker’s Shrinkage [%]
As Cast 1100 - 2.3
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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