18Cr/38NiNb - Fondinox

ACI/CAST GRADE	CAST ASTM	CAST EN/DIN	CAST UNS	WROUGHT UNS	WROUGHT GRADE
18Cr/38NiNb	–	1.4849 GX40NiCrSiNb38-18	–	–	INCOLOY DS

CHEMICAL COMPOSITION (wt%, TYPICAL VALUES)
C	Cr	Ni	Si	Other
0.40	18.0	37.5	1.8	1.5Nb

CASTINGS MINIMUM MECHANICAL PROPERTIES (AT 20°C, UNLESS OTHERWISE SPECIFIED)
Rp_0.2[MPa]	Rm [MPa]	A %	Hardness [HB]	Impact [J]
235	450	8	–	–

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
–	55	36	21	6	–	–	53	33	20	6.5	–

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	8.04	–	–	–	–

WORKING CONDITIONS / FABRICATION
Heat Treatment	Max working T in air [°C]	Machinability [100 = CF8M]	Patternmaker’s Shrinkage [%]
As Cast	1050		2.3

CHEMICAL COMPOSITION (wt%, TYPICAL VALUES)
Categoria:	Fe-Ni-Cr
ACI/CAST GRADE	18Cr/38NiNb
CAST ASTM	–
CAST EN/DIN	1.4849 GX40NiCrSiNb38-18
CAST UNS	–
WROUGHT UNS	–
WROUGHT GRADE	INCOLOY DS
C	0.40
Cr	18.0
Ni	37.5
Si	1.8
Other	1.5Nb
CASTINGS MINIMUM MECHANICAL PROPERTIES (AT 20°C, UNLESS OTHERWISE SPECIFIED)
Rp_0.2[MPa]	235
Rm [MPa]	450
A %	8
Hardness [HB]	–
Impact [J]	–
CREEP LIMIT
Creep limit 1% 10.000 hours MPa at °C
600	–
700	55
800	36
900	21
1000	6
1100	–
Creep strength for 100.000 hours MPa at °C
600	–
700	53
800	33
900	20
1000	6.5
1100	–
PHYSICAL PROPERTIES (AT 20°C, UNLESS OTHERWISE SPECIFIED)
Microstructure	Austenitic, Carbides
ρ [kg/dm³]	8.04
α [μm/m∙K] (20 – 100 °C)	–
K [W/m∙K]	–
Cp [J/kg∙K]	–
Melting ΔT [°C]	–
WORKING CONDITIONS / FABRICATION
Heat Treatment	As Cast
Max working T in air [°C]	1050
Machining
Patternmaker’s Shrinkage [%]	2.3