HH - Fondinox

ACI/CAST GRADE	CAST ASTM	CAST EN/DIN	CAST UNS	WROUGHT UNS	WROUGHT GRADE
HH	A297	1.4837 GX40CrNiSi25-12	J93505	S30900	AISI 309

CHEMICAL COMPOSITION (wt%, TYPICAL VALUES)
C	Cr	Ni	Si	Other
0.40	25.0	12.5	1.8	–

CASTINGS MINIMUM MECHANICAL PROPERTIES (AT 20°C, UNLESS OTHERWISE SPECIFIED)
Rp_0.2[MPa]	Rm [MPa]	A %	Hardness [HB]	Impact [J]
240	515	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
–	44	22	11	4.5	–	45	30	15	6	2.8	–

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	7.72	20	14	502	1370

WORKING CONDITIONS / FABRICATION
Heat Treatment	Max working T in air [°C]	Machinability [100 = CF8M]	Patternmaker’s Shrinkage [%]
As Cast	1000	–	2.4

CHEMICAL COMPOSITION (wt%, TYPICAL VALUES)
Categoria:	Fe-Cr-Ni
ACI/CAST GRADE	HH
CAST ASTM	A297
CAST EN/DIN	1.4837 GX40CrNiSi25-12
CAST UNS	J93505
WROUGHT UNS	S30900
WROUGHT GRADE	AISI 309
C	0.40
Cr	25.0
Ni	12.5
Si	1.8
Other	–
CASTINGS MINIMUM MECHANICAL PROPERTIES (AT 20°C, UNLESS OTHERWISE SPECIFIED)
Rp_0.2[MPa]	240
Rm [MPa]	515
A %	10
Hardness [HB]	–
Impact [J]	–
CREEP LIMIT
Creep limit 1% 10.000 hours MPa at °C
600	–
700	44
800	22
900	11
1000	4.5
1100	–
Creep strength for 100.000 hours MPa at °C
600	45
700	30
800	15
900	6
1000	2.8
1100	–
PHYSICAL PROPERTIES (AT 20°C, UNLESS OTHERWISE SPECIFIED)
Microstructure	Austenitic, Carbides
ρ [kg/dm³]	7.72
α [μm/m∙K] (20 – 100 °C)	20
K [W/m∙K]	14
Cp [J/kg∙K]	502
Melting ΔT [°C]	1370
WORKING CONDITIONS / FABRICATION
Heat Treatment	As Cast
Max working T in air [°C]	1000
Machining	–
Patternmaker’s Shrinkage [%]	2.4