Duplex Stainless Steels

Duplex stainless steels are virtually immune to stress corrosion cracking (the Achilles’ heel of common austenitic stainless steels) and are highly resistant to pitting and crevice corrosion.  Possessing these characteristics, it is not surprising to find the majority, but by no means all, of applications to be seawater related.  Duplex stainless steels have many uses in offshore oil and gas production and Naval equipment, particularly sub-surface.

  • MTEK SD100

    Cast UNS: J93380

    Cast Grade: CD3MWCuN; 6A

    Cast ASTM: A890 6A, A995, 6A (CENT, INVEST, SAND)

    Wrought UNS: S32760

    Wrought Grade: Zeron 100

  • MTEK 29MN

    Cast UNS: J93372

    Cast Grade: CD4MCuN; 1B

    Cast ASTM: A890, 1B (CENT, INVEST, SAND); A995, 1B (CENT, INVEST, SAND)

  • MTEK 29M

    Cast UNS: J93370

    Cast Grade: CD4MCu; 1A

    Cast ASTM: A890, 1A (CENT, INVEST, SAND)

  • MTEK 2507

    Cast UNS: J93404

    Cast Grade: CE3MN; 5A

    Cast ASTM: A890, A995 (CENT, INVEST, SAND)

    Wrought UNS: S32750

    Wrought Grade: 2507

  • MTEK 2205

    Cast UNS: J92205

    Cast Grade: CD3MN; 4A

    Cast ASTM: A890, A995, 4A (CENT, INVEST, SAND)

    Wrought UNS: S31803

    Wrought Grade: 2205

  • FERRALIUM® 255

    Cast UNS: J32550

    Cast Grade: FERRALIUM® 2553

    Wrought UNS: S32550

    Wrought Grade: FERRALIUM® 255

  • ESCOLOY 45D®

    Cast UNS: J93345

    Cast Grade: CE8MN; 2A

    Cast ASTM: A890, A995 (CENT, INVEST, SAND)

    Wrought UNS: S32750

    Wrought Grade: ESCOLOY 45D®

  • ALLOY 86