ACI/CAST
GRADE		 CAST ASTM CAST EN/DIN CAST UNS WROUGHT
UNS		 WROUGHT
GRADE
CF8C A351, A743, A744 1.4552, GX5CrNiNb18-9 J92910 S34700 AISI 347
CHEMICAL COMPOSITION (wt%, TYPICAL VALUES)
C Cr Ni Mo Other PREn
<0.08 19.5 10.5 <0.5 Nb>8x%C
CASTINGS MINIMUM MECHANICAL PROPERTIES (AT 20°C, UNLESS OTHERWISE SPECIFIED)
Rp0.2[MPa] Rm [MPa] A % Hardness [HB] Impact [J]
205 485 30 140-200 80
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 (δ ferrite) 7.75 16 14.7 448 1399-1454
WORKING CONDITIONS / FABRICATION
Heat Treatment Weldability Machinability [100 = CF8M] Patternmaker’s Shrinkage [%]
Solution Annealing Excellent 2.7
Categoria: Austenitic
ACI/CAST
GRADE		 CF8C
CAST ASTM A351, A743, A744
CAST EN/DIN 1.4552, GX5CrNiNb18-9
CAST UNS J92910
WROUGHT
UNS		 S34700
WROUGHT
GRADE		 AISI 347
CHEMICAL COMPOSITION (wt%, TYPICAL VALUES)
C <0.08
Cr 19.5
Ni 10.5
Mo <0.5
Other Nb>8x%C
PREn
CASTINGS MINIMUM MECHANICAL PROPERTIES (AT 20°C, UNLESS OTHERWISE SPECIFIED)
Rp0.2[MPa] 205
Rm [MPa] 485
A % 30
Hardness [HB] 140-200
Impact [J] 80
PHYSICAL PROPERTIES (AT 20°C, UNLESS OTHERWISE SPECIFIED)
Microstructure Austenitic (δ ferrite)
ρ [kg/dm3] 7.75
α [μm/m∙K] (20 – 100 °C) 16
K [W/m∙K] 14.7
Cp [J/kg∙K] 448
Melting ΔT [°C] 1399-1454
WORKING CONDITIONS / FABRICATION
Heat Treatment Solution Annealing
Weldability Excellent
Machining
Patternmaker’s Shrinkage [%] 2.7

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