HK - Fondinox

ACI/CAST GRADE	CAST ASTM	CAST EN/DIN	CAST UNS	WROUGHT UNS	WROUGHT GRADE
HK	A297	1.4848 GX40CrNiSi25-20	J94224	S31000	AISI 310

CHEMICAL COMPOSITION (wt%, TYPICAL VALUES)
C	Cr	Ni	Si	Other
0.40	25.0	20.0	1.75

CASTINGS MINIMUM MECHANICAL PROPERTIES (AT 20°C, UNLESS OTHERWISE SPECIFIED)
Rp_0.2[MPa]	Rm [MPa]	A %	Hardness [HB]	Impact [J]
240	450	10	–	–

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
	57	35	18	8	2.5	–	45	32	17	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	7.75	18.4	22	451	1425-1455

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-Cr-Ni
ACI/CAST GRADE	HK
CAST ASTM	A297
CAST EN/DIN	1.4848 GX40CrNiSi25-20
CAST UNS	J94224
WROUGHT UNS	S31000
WROUGHT GRADE	AISI 310
C	0.40
Cr	25.0
Ni	20.0
Si	1.75
Other
CASTINGS MINIMUM MECHANICAL PROPERTIES (AT 20°C, UNLESS OTHERWISE SPECIFIED)
Rp_0.2[MPa]	240
Rm [MPa]	450
A %	10
Hardness [HB]	–
Impact [J]	–
CREEP LIMIT
Creep limit 1% 10.000 hours MPa at °C
600
700	57
800	35
900	18
1000	8
1100	2.5
Creep strength for 100.000 hours MPa at °C
600	–
700	45
800	32
900	17
1000	6.5
1100	–
PHYSICAL PROPERTIES (AT 20°C, UNLESS OTHERWISE SPECIFIED)
Microstructure	Austenitic, Carbides
ρ [kg/dm³]	7.75
α [μm/m∙K] (20 – 100 °C)	18.4
K [W/m∙K]	22
Cp [J/kg∙K]	451
Melting ΔT [°C]	1425-1455
WORKING CONDITIONS / FABRICATION
Heat Treatment	As Cast
Max working T in air [°C]	1050
Machining
Patternmaker’s Shrinkage [%]	2.3