Grade S32760 & Grade S31803 Tube

UNS S31803 : Duplex : ASTM A789 (VO1.01) (F51) UNS S32760 : Super Duplex : ASTM A789 (VO1.01) (F55)
Trade Name Zeron 100 (5), Zeron 25 (5)

General scope

Both alloys combine the dual features of high strength and corrosion resistance obtained through the dual phase microstructure (50% austenite, 50% ferrite) associated with duplex stainless steels. UNS S32760 properties are slightly enhanced over S31803 by further additions of chromium (to 25%), and also tungsten and copper.

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

Chemical composition

UNS S31803

(PREN = % Cr + 3.3% Mo + 16% N)
C Si Mn P S Cr Ni Mo N PREN Fe
Min 21.00 4.50 2.50 0.08 33.00 0.00
Max 0.03 1.00 2.00 0.030 0.020 23.00 6.50 3.50 0.02 0.00

UNS S32760

(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: UNS S31803 Solution Annealed and Water Quenched

U.T.S 90 KSI Min (620 N/mm2)
0.2% Proof Stress 65 KSI Min (450 N/mm2)
Elongation 25 %
Red of Area 45 %
CVN Impacts @ -40°C (-40°F) 40 Joules (30 ft-lbf)

Condition: UNS S32760 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 @ -40°C (-40°F) 50 Joules (37 ft-lbf)
Size range: 3.5”∅ - 8.5”∅

Primarily manufactured in:

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