HP - Fondinox

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)
Rp_0.2[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

CHEMICAL COMPOSITION (wt%, TYPICAL VALUES)
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	–
C	0.40
Cr	25.0
Ni	35.0
Si	1.8
Other	–
CASTINGS MINIMUM MECHANICAL PROPERTIES (AT 20°C, UNLESS OTHERWISE SPECIFIED)
Rp_0.2[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