Duplex ASTM a182 F44 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 F44 gets the maximum result at soluble status and we recommend not to use it at temperatures higher than 300°C.

F51, F44 and F44 can be welded by using common means and must be soluble after the welding operation.

COMPARABLE SPECIFICATIONS

NOMINAL CHEMICAL COMPOSITION

 
>> PHYSICAL PROPERTIES F44

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

Spefic heat
J/g.K. (20°C) 500

Thermal expansion coefficient
20°-200°C 16.5
20°-400°C 17.2
20°-600°C 17.8

No magnetic

MECHANICAL PROPERTIES AT ROOM TEMPERATURE

Yield strenght
RP 0.2 N/mm2 ≥300

Tensile strenght
Rm N/mm2 ≥650

Elongation
A5 %   ≥35

Reduction of area
Z% ≥50

Hardness
HB ≤260