Duplex Steels

Duplex Steels

Duplex Steels

Duplex stainless steels are called "duplex" because they have a two-phase microstructure consisting of grains of ferritic and austenitic stainless steel. This structure provides a unique set of benefits

Strength Corrosion resistance Toughness and ductility
Duplex stainless steels are about twice as strong as
regular austenitic or ferritic stainless steel.
As with all stainless steels, corrosion resistance
depends mostly on the composition of the stainless
steel. The composition of this steel makes it better
at resisting corrision.
Duplex stainless steel has significantly better
toughness and ductility than ferritic grades.

PREN

Steel Grade PREN
1.4307 18
1.4404 24
904L 34
1.4462 31
2205 35

MECHANICAL

Grade No. Yield Strength (Rp 0.2%) (Min) UTS (Mpa)(Min) UTS(Mpa)(Max) % Elongation(Min) % Reduction Area (Min) Hardness(BHN) (Max)
1.4462 450 680 880 30 - 270
UNS S31803 450 620 - 25 45 262
UNS S32205 485 655 25 45 290 -

Chemical

Standard Grade C % Si % Mn % P % S % Cr % Mo % Ni (Max) Cu % N2 (Max) W %
ASTM A 182:2013 F-51 0.03 1 2 0.03 0.02 21-23 2.5-3.5 4.5-6.5 - 0.08-0.20 -
ASTM A 182:2013 F-60 0.03 1 2 0.03 0.02 22-23 3.0-3.5 4.5-6.5 - 0.14-0.2 -
ASTM A 182:2013 F-53 0.03 0.8 1.2 0.035 0.02 24-26 3-5 6.0-8.0 0.5 0.24-0.32 -
ASTM A 182:2013 F-55 0.03 1 1 0.03 0.01 24-26 3-5 6.0-8.0 0.5-1.0 0.2-0.3 0.5 - 1.0
ASTM A 276:2013 UNS S32205 0.03 1 2 0.03 0.02 22-23 3.0-3.5 4.5-6.5 - 0.14-0.2 -
ASTM A 276:2013 UNS S31803 0.03 1 2 0.03 0.02 21-23 2.5-3.5 4.5-6.5 - 0.08-0.20 -
ASTM A 240:2005 UNS S32750 0.03 0.8 1.2 0.035 0.02 24-26 3-5 6.0-8.0 0.5 0.24-0.32 -
DIN EN 10088-3:2005 1.4462 0.03 1 2 0.035 0.015 21-23 2.5-3.5 4.5-6.5 - 0.1-0.22 -
DIN EN 10088-3:2005 1.4460 0.05 1 2 0.035 0.03 25-28 1.3-2.0 4.5-6.5 - 0.05-0.2 -
EN 10095:1999 1.4821 0.1-0.2 0.8-1.5 2 0.04 0.015 24.5-26.5 - 3.5-5.5 - 0.11 -
DIN EN 10088-3:2005 1.4410 0.03 1 2 0.035 0.015 24-26 3.0-4.5 6.0-8.0 - 0.24-0.35 -

Applications:

Structural Design Components
Storage and Exchange Equipment (High Pressure, Saline applications)
Heat exchangers
Aerospace, Pulp and Paper Industry
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Duplex Steels