Grade S32760 - F55

UNS S32760 : Super Duplex : ASTM A182 (VO1.01), A276 (VO1.03), A479 (VO1.03), BS EN 10088
Trade Name Zeron 100 (4)

Chemical composition

(PREN = % Cr + 3.3% Mo + 16% N)
C Si Mn P S Cr Ni Mo Cu N W PREN Fe
Min 24.00 6.00 3.00 0.50 0.20 0.50 40.00 0.00
Max 0.03 1.00 1.00 0.030 0.010 26.00 8.00 4.00 1.00 0.30 1.00 0.00

Mechanical properties

Condition: Solution Annealed and Water Quenched.

NACE MR0175 limits the supply hardness to 28 HRC max.
U.T.S 109 KSI Min (750 N/mm2)
0.2% Proof Stress 80 KSI Min (550 N/mm2)
Elongation 25 %
Red of Area 45 %
CVN Impacts @ -46°C (-50°F) 45 Joules (33 ft-lbf)
Size range: 1”∅ - 16”∅

General scope

The characteristic features of high strength and corrosion resistance exhibited by the dual microstructure (50% Austenite, 50% Ferrite) associated with Duplex Stainless Steels, are enhanced by a further addition of Chromium (to 25%), and also Tungsten and Copper.

The alloy's pitting and Crevice Corrosion resistance is better than Standard F51 duplex, The pitting index (PREN) is increased to 40 min from standard F51 Duplex value of 33 min.

Thin sections (Tubulars) are capable of being cold worked to give yield strength of 105 KSI min.

To optimise mechanical properties, avoid clinking, and to avoid deleterious intermetallics within the microstructure; special high temp forming and heat treatment control practices must be followed during processing.

Primarily manufactured in:

  • Dubai, UAE
  • Edmonton, Canada
  • Houston, Texas
  • Sheffield, England
  • Singapore

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