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CN7M

ACI/CAST
GRADE
CAST ASTM CAST EN/DIN CAST UNS WROUGHT
UNS
WROUGHT
GRADE
CN7M A351, A743, A744 - N08007 N09020 20Cb3
CHEMICAL COMPOSITION (wt%, TYPICAL VALUES)
C Cr Ni Mo Other PREn
<0.07 20.0 29.0 2.5 3.2Cu -
CASTINGS MINIMUM MECHANICAL PROPERTIES (AT 20°C, UNLESS OTHERWISE SPECIFIED)
Rp0.2[MPa] Rm [MPa] A % Hardness [HB] Impact [J]
170 425 35 110-180 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 8.0 15 13 435 1315-1391
WORKING CONDITIONS / FABRICATION
Heat Treatment Weldability Machinability [100 = CF8M] Patternmaker’s Shrinkage [%]
Solution Annealing Satisfactory - 2.9
Categoria: Superaustenitic
ACI/CAST
GRADE
CN7M
CAST ASTM A351, A743, A744
CAST EN/DIN -
CAST UNS N08007
WROUGHT
UNS
N09020
WROUGHT
GRADE
20Cb3
CHEMICAL COMPOSITION (wt%, TYPICAL VALUES)
C <0.07
Cr 20.0
Ni 29.0
Mo 2.5
Other 3.2Cu
PREn -
CASTINGS MINIMUM MECHANICAL PROPERTIES (AT 20°C, UNLESS OTHERWISE SPECIFIED)
Rp0.2[MPa] 170
Rm [MPa] 425
A % 35
Hardness [HB] 110-180
Impact [J] 80
PHYSICAL PROPERTIES (AT 20°C, UNLESS OTHERWISE SPECIFIED)
Microstructure Austenitic
ρ [kg/dm3] 8.0
α [μm/m∙K] (20 - 100 °C) 15
K [W/m∙K] 13
Cp [J/kg∙K] 435
Melting ΔT [°C] 1315-1391
WORKING CONDITIONS / FABRICATION
Heat Treatment Solution Annealing
Weldability Satisfactory
Machining -
Patternmaker’s Shrinkage [%] 2.9

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