CN7M - Fondinox

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)
Rp_0.2[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

CHEMICAL COMPOSITION (wt%, TYPICAL VALUES)
Categoria:	Superaustenitic
ACI/CAST GRADE	CN7M
CAST ASTM	A351, A743, A744
CAST EN/DIN	–
CAST UNS	N08007
WROUGHT UNS	N09020
WROUGHT GRADE	20Cb3
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)
Rp_0.2[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