Duplex ASTM A182 F44 SMO 254 is an austenitic and ferritic structural stainless steel with a good mechanical and corrosion resistance. It is suitable to be used in case of parts, valves and pumps under pressure and subject to corrosion and in case of centrifugal pumps under heavy corrosive conditions. It is the best material among the austenitic Cr-Ni types even in presence of chlorides and moreover when further to corrosive conditions we also have mechanical stress. The corrosion resistance of A182 F44 gets the maximum result at soluble status and we recommend not to use it at temperatures higher than 300°C.

A182 F44 can be welded by using common means and must be soluble after the welding operation.

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» COMPARABLE SPECIFICATIONS

EN 10088/3	X1CrNiMoCuN20-18-7
W.	1.4547
UNS	S 31254
ASTM	F44

» ASTM A182 F44 SMO 254 NOMINAL CHEMICAL COMPOSITION

C	S	P	Si	Mn	Cr	Ni	Mo	N
0.02	<0.015	0.025	0.50	1.4	22.70	5.6	3.2	0.16

» ASTM A182 F44 SMO 254 PHYSICAL PROPERTIES

Density

• g/cm3 20°C 8.0

Modulus of elasticity

• N/mm2 20°C 200.000

Thermal conductivity

• W/m.K. (20°C) 13,50

Specific heat

• J/g.K. (20°C) 500

Thermal expasion coefficient

• 20°-200°C 16.5
• 20°-400°C 17.2
• 20°-600°C 17.8

No magnetic

» ASTM A182 F44 SMO 254 MECHANICAL PROPERTIES AT ROOM TEMPERATURE

Yield strenght

• RP 0.2 N/mm2 ≥300

Tensile strength

• Rm N/mm2 ≥650

Elongation

• A5 % ≥35

Reduction of area

• Z% ≥50

Hardness

• HB ≤260