Alloy 20 / SMO 254 / AISI 4130 Technical Information

Alloy 20 Flanges Chemical Composition

Grade	C	Mn	Si	S	Cu	Ni	Cr	Fe	Mo	P
Alloy 20	0.07 max	2.00 max	1.00 max	0.035 max	3.0-4.0	32.0-38.0	19.0-21.0	29.85 min*	2.0-3.0	0.045 max

SMO 254 Flanges Chemical Composition

Grade	C	Mn	Si	Cu	S	P	Mo	Ni	Cr
SMO 254	0.02	1	0.08	0.5-1.0	0.01	0.03	6.0-6.5	17.5-18.5	19.5-20.5

AISI 4130 Flanges Chemical Composition

Grade	C	Mn	Si	P	S	Fe	Mo	Ni	Cr
AISI 4130	0.28-0.33	0.40-0.60	0.15-0.35	0.035 max	0.025 MAX	97.3-98.22	0.15-0.25	0.50 max	0.80-1.10

Alloy 20 Flanges Mechanical Properties

Density	Melting Point	Tensile Strength	Yield Strength (0.2%Offset)	Elongation
8.1 g/cm3	1443 °C (2430 °F)	Psi -80,000, MPa -551	Psi – 35,000, MPa – 241	30%

SMO 254 Flanges Mechanical Properties

Density	Melting Point	Tensile Strength	Yield Strength (0.2%Offset)	Elongation
8 g/cm3	1320-1390 ℃	650	300	35 %

AISI 4130 Flanges Mechanical Properties

Density	Melting Point	Tensile Strength	Yield Strength (0.2%Offset)	Elongation
7.85 g/cm3	1432 ℃	560	460	21.50%

Alloy 20 Flanges Equivalent Grades

STANDARD	WERKSTOFF NR.	UNS	AFNOR	EN
Alloy 20	2.4660	N08020	Z2NCUD31-20AZ	NiCr20CuMo

SMO 254 Flanges Equivalent Grades

STANDARD	WERKSTOFF NR.	UNS	SIS	BS	GOST	AFNOR	EN
SMO 254	1.4547	S31254	2378	–	–	Z1 CNDU 20.18.06Az	X1CrNiMoCuN20-18-7

AISI 4130 Flanges Equivalent Grades

STANDARD	WERKSTOFF NR.	UNS	JIS	BS	EN
AISI 4130	1.7218	G41300	JIS G4105	BS 970	25CrMo4