Duplex F51 Material Suppliers/duplex stainless steel grade F51 flanges

Duplex F51 Material Suppliers - Largest Distributor of f51 forged bar, f51 round bar, duplex stainless steel grade F51 flanges 140 Ton Ready Stock for Sale.

Naman Pipe & Tubes has duplex stainless steel grade F51 flanges inventory to fulfill your project’s needs, buy duplex stainless steel grade F51 flanges at best price & fast delivery. Supplying f51 forged bar, f51 round bar &, duplex stainless steel grade F51 flanges from approved manufactures and stockists based in the INDIA

duplex stainless steel grade F51 flanges - Super Duplex steel grades are designed to offer a super combination of heat resistance, high temperature corrosion resistance, toughness and strength, and are used in the world’s most technically demanding industries.

Our specialty at Naman Pipe & Tubes offers a full range of duplex stainless steel grade F51 flanges, forged bar, Pipe, Tubes, Sheet, Plate, Fasteners And Round Bar form. We have ready stock available of duplex stainless steel grade F51 flanges Pipe, Tubes, Sheet, Plate, Fasteners And Round Bar in all forms which makes an ideal one stop shop for all your requirements.
Our reputation is to supply our customers with QUALITY MATERAL, IMMEDIATE DELIVERIES and LOW PRICES. Our first priority is “Servicing out Customers.” Twenty-four Hours a Day. We also supply products with minimum orders, in small quantity of all sizes.

UNS S31803
Equivalent standards
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.

EN10088-3 X2CrNiMoN22-5-3
ASTM A182 F51
W.Nr. 1.4462
NORSOK D41 to D45

F51 is a duplex stainless steel with a 50:50 austenite, ferrite microstructure. The material combines good mechanical strength and ductility with moderate to good corrosion resistance in a variety of environments. This material is generally supplied in the annealed condition giving yield strengths in excess of 65 KSI (450Mpa), this material cannot be hardened by heat treatment but stronger surface strengths can be achieved by cold working. Typical applications include pumps, valves, pipework, flanges etc together with various applications in the oil and gas, brewing, power generation and chemical engineering industries. In fact this alloy can be used successfully as an alternative to 300 series austenitic stainless steels in almost all applications where higher mechanical strength/lower weight is required.

ASTM A182 F51duplex stainless steel baring high resistance to various forms of corrosion making them ideal for Oil and Petrochemical applications. COLDUPLEX-CS is the basic grade of duplex stainless steel based on a 22% chromium and 5% nickel content. It is suitable for applications which involve high mechanical stresses and severe corrosion conditions, particularly where there is frequent contact with high levels of chlorides, carbon dioxide and hydrogen sulphide as may be encountered in the gas, petrochemical and offshore industries.

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Chemical composition

Element Weight %
Cr 21.0 — 23.0
Ni 4.5 — 6.5
Mo 2.5 — 3.5
Mn 0.0 — 2.0
Si 0.0 — 1.0
N 0.08 — 0.2
C 0.0 — 0.03
P 0.0 — 0.02
S 0.0 — 0.02



Electrical resistivity [ ρel ]

8E-7 Ω·m

General information

Density [ ρ ]

7.80 g/cm³


Elastic modulus [ E ]

199.00 GPa

Elongation [ A ]

25.00 %

Hardness, Brinell [ HB ]

280.00 [-]

Poisson's ratio [ ν ]

0.32 [-]

Tensile strength [ Rm ]

620.00 MPa

Yield strength [ YS ]

448.00 MPa


Coefficient of thermal expansion [ α ]

1.11E-5 1/K

Specific heat capacity [ cp ]

425.00 J/(kg·K)

Thermal conductivity [ λ ]

1.4E-5 W/(m·K)

UNS S31803 F51 – Duplex stainless Steel Forging

Forging temperature for this material should be 1100 – 1250oC Reheat as often as necessary and cool in still air.

UNS S31803 F51 – Duplex stainless Steel Machining

Material in the annealed condition is readily machinable by all conventional methods.

UNS S31803 F51 – Duplex stainless Steel Welding

F51 is readily weldable using many of the standard electric arc welding processes but oxyacetylene welding is not recommended because carbon pickup in the weld metal may occur.

UNS S31803 F51 – Duplex stainless Steel Heat Treatment

Anneal – Heat to 1020 – 1120oC ensuring sufficient time is allowed for the centre to achieve furnace temperature and hold for a time commensurate with the ruling section, followed by water quenching.

UNS S31803 F51 – Duplex stainless Steel Applications

  • Pressure Systems.
  • Flanges
  • Valves Fittings
  • Couplings
  • Rings
  • Shafts
  • Forgings


  • Duplex Grade F51 Sheet
  • Duplex Grade F51 Plate
  • Duplex Grade F51 Flanges
  • Duplex Grade F51 Bolts
  • Duplex Grade F51 Nuts
  • Duplex Grade F51 Screws
  • Duplex Grade F51 Washers
  • Duplex Grade F51 Buttweld Fitting
  • Duplex Grade F51  Socketweld Fitting
  • Duplex Grade F51 Round Bars
  • Duplex Grade F51 Square Bar
  • Duplex Grade F51 Flat Bars
  • Duplex Grade F51 Hex Bars
  • Duplex Grade F51 Bright Bars
  • Duplex Grade F51 Black Bars
  • Duplex Grade F51 Forged Bars
  • Duplex Grade F51 Wire
  • Duplex Grade F51 Seamless Pipe
  • Duplex Grade F51 Welded Pipe
  • Duplex Grade F51 Fabricated Pipe
  • Duplex Grade F51 EFW Pipe
  • Duplex Grade F51 ERW Pipe
  • Duplex Grade F51 Round Pipe
  • Duplex Grade F51 Square Pipe
  • Duplex Grade F51 Rectangle Pipe
  • Duplex Grade F51 Polish Pipe
  • Duplex Grade F51 Seamless Tubes
  • Duplex Grade F51 Welded Tubes
  • Duplex Grade F51 Round Tubes
  • Duplex Grade F51 Square Tubes
  • Duplex Grade F51 Hollow Pipe
  • Duplex Grade F51 Bush Pipe
  • Duplex Grade F51 Tube Coil
  • Duplex Grade F51 Electro Polish Tube

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