Duplex S31803

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Duplex S31803

We are stockists of 31803 duplex alloys in sheet, plate, and bar directly distributed globally from our UK stockholding warehouse, combined with our large capacity cutting capabilities we can meet requirements for many industries. duplex-s31803

The following are the properties of 31803:

  • Stainless ferritic-austenitic Cr-Ni-Mo steel with nitrogen addition.
  • High corrosion resistance, especially against stress corrosion cracking in
    solutions containing chloride.
  • Good strength properties.
  • Resistant to intergranular corrosion in the temperature range up to 300°C.
  • Heat treatment subsequent to welding not necessary.
  • Surface condition for optimum corrosion resistance: pickled, heat treated
    free from scale or machined.

Mechanical Properties

Condition: solution annealed

Product Dimension
Size
mm
0.2% proof stress
N/mm2
min.
Tensile strength
N/mm2
Elongation A5
% min.
L    Q     T
Impact strength
(ISO-V)
J min.
L    Q     T
St ≤ 160 450 650 – 880 25   – –    – - 100   – –    – -
Bl ≤ 75 460 640 – 840 252)  252)  – - 90   60    – -