We supply Duplex ASTM a182 DUPLEX and SUPERDUPLEX F51, UNS 31803 EN 1.4462 screws made in stainless steel Cr-Ni-Mo-N double-phase pitting  and stressed corrosion resistant.

F51 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 a mechanical stress. The corrosion resistance of F51 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 F51

Density
g/cm3 20°C 7.8

Modulus of elasticity
N/mm2 20°C 200.000

Thermal conductivity
W/m.K. (20°C) 15

Specific heat
J/g.K. (20°C) 500

Thermal expasion coefficient
20°-200°C 13.5
20°-400°C 14.5
20°-600°C 15.0

Magnetic

MECHANICAL PROPERTIES AT ROOM TEMPERATURE


Yield strenght
RP 0.2 N/mm2 ≥450

Tensile strength
Rm N/mm2 650-880

Elongation
A5 %   ≥25

Reduction of area
Z% ≥45

Hardness
HB ≤270