Duplex Steel Flanges Suppliers + 2205 S31803 Duplex Stainless Steel Flanges

Naman Pipe & Tubes is one of the largest manufacturer of Duplex Steel S31803 Flanges, Duplex Steel S32205 Plate Flanges, Duplex Stainless Steel Blind Flanges, Duplex Steel S31803 ansi b16.5 Flanges Class 300 to 3000 Worldwide

high quality Duplex Steel Flanges, Duplex Steel slip on flanges, 2205 Duplex WNRF Flanges Exporter, Ferritic / Austenitic Duplex Steel 2205 Industrial Flanges, Stockholder Of Duplex Steel S31803 RTJ Flange in INDIA

Duplex steel flangesNaman Pipes & Tubes is a highly acclaimed manufacturer of Fittings & Flanges and supplier of all ferrous and non-ferrous metal products like stainless steel pipes, stainless steel tubes, Duplex & Super Duplex Flanges, etc. The company has carved an unparalleled position in the industry by making relentless efforts to cater to the clients with premium quality flanges.

Duplex stainless steel

Duplex stainless steels are called “duplex” because they have a two-phase microstructure consisting of grains of ferritic and austenitic stainless steel. The picture shows the yellow austenitic phase as “islands” surrounded by the blue ferritic phase. When duplex stainless steel is melted it solidifies from the liquid phase to a completely ferritic structure. As the material cools to room temperature, about half of the ferritic grains transform to austenitic grains (“islands”). The result is a microstructure of roughly 50% austenite and 50% ferrite.

The duplex structure gives this family of stainless steels a combination of attractive properties:

Strength: Duplex stainless steels are about twice as strong as regular austenitic or ferritic stainless steels. 

Toughness and ductility: Duplex stainless steels have significantly better toughness and ductility than ferritic grades; however, they do not reach the excellent values of austenitic grades. 

Corrosion resistance: As with all stainless steels, corrosion resistance depends mostly on the composition of the stainless steel. For chloride pitting and crevice corrosion resistance, their chromium, molybdenum and nitrogen content are most important. Duplex stainless steel grades have a range of corrosion resistance, similar to the range for austenitic stainless steels, i.e from Type 304 or 316 (e.g. LDX 2101©) to 6% molybdenum (e.g. SAF 2507©) stainless steels.

Stress corrosion cracking resistance: Duplex stainless steels show very good stress corrosion cracking (SCC) resistance, a property they have “inherited” from the ferritic side. SCC can be a problem under certain circumstances (chlorides, humidity, elevated temperature) for standard austenitics such as Types 304 and 316.

Cost: Duplex stainless steels have lower nickel and molybdenum contents than their austenitic counterparts of similar corrosion resistance. Due to the lower alloying content, duplex stainless steels can be lower in cost, especially in times of high alloy surcharges. Additionally, it may often be possible to reduce the section thickness of duplex stainless steel, due to its increased yield strength compared to austenitic stainless steel. The combination can lead to significant cost and weight savings compared to a solution in austenitic stainless steels.

Duplex Steel Flanges

Ready Stock Available!

stainless steel pipes stainless steel tubes

1/2" NB TO 48"NB.

UNS S31803, S32205 (2205),S32750 (2507), S32760 (Z-100)
S32900 (329), S32304, F-51, F-53, F-54, F-55 & F-60 & HIGH NICKEL ALLOYS

Duplex Steel S31803 Pipe Flanges Specifications
Specifications : ASTM A182 / ASME SA182
Size : 1/8″ NB TO 24″ NB
: ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, etc.
Class / Pressure : 150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc.
Standard : ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, etc.
Grades : S31803 / S32205 A182 Gr F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F61

Duplex Steel S31803 /  S32205 Pipe Flanges Chemical Composition

Grade C Mn Si P S Cr Mo Ni N Fe
S31803 0.030 max 2.00 max 1.00 max 0.030 max 0.020 max 22.0 – 23.0 3.0 – 3.5 4.50 – 6.50 0.14 – 0.20 63.72 min
S32205 0.030 max 2.00 max 1.00 max 0.030 max 0.020 max 21.0 – 23.0 2.50 – 3.50 4.50 – 6.50 0.8 – 0.20 63.54 min

Duplex Steel S31803 / S32205 Plate Flanges Mechanical Properties

Grades Density (g/cm 3) Density (lb/in 3) Melting Point (°C) Melting Point (°F)
S31803 / S32205 7.805 0.285 1420 – 1465 2588 – 2669

Equivalent Grades for S31803 / S32205 Duplex Steel Industrial Pipe Flanges

Duplex 2205 1.4462 S31803 / S32205

Duplex and Super Duplex Weldneck, Duplex and Super Duplex Slipon, Duplex and Super Duplex Blind, Duplex and Super Duplex Socket Weld, Duplex and Super Duplex Lap Joint, Duplex and Super Duplex Spectacles, Duplex and Super Duplex Ringjoint, Duplex and Super Duplex Orifcase, Duplex and Super Duplex Long Weldneck, Duplex and Super Duplex Deck Flange, etc.

MR 01-75, MR 01 03

150#, 300#,400 #,600#,900#, 1500# & 2500 #.

Duplex Steel S31803 / S32205 Flanges Price List

  • S31803 Flanges
    US $0.5-1000 / Piece (FOB Price)
  • Duplex Steel  S32205 Pipe Flanges
    US $300-500 / Ton (FOB Price)
  • Duplex Steel S31803 Weld Neck Flanges
    US $1-900 / Piece (FOB Price)
  • ASTM A182 S31803 duplex stainless steel plate flanges
    US $0.5-1000 / Piece (FOB Price)
  • S32205 Duplex Steel Pipe Flanges
    US $1-300 / Piece (FOB Price)

• Anodising
• Casting
• Centreless Grinding (CG)
• Drilling
• Electroplating
• Forging
• Heat Treatment (Hardening & Tempering)
• Machining (CNC)
• Pickled
• Polish (Electro & Commercial)
• Threading (As per Guage)
• Welding


Our Materials Are Tested To Relevant Standard And Wherever Possible We Give Original / Copy Of Test Certificate With Heat Number As Well As Govt. Approved Laboratories Test Certificate Can Also Be Provided.  We Supply the Material under Inspection of Any Third Party Inspection Agency as per the Client’s Requirements Such As :
1) Bv- Bureau VERITAS Industrial Services (India) Pvt. Ltd
2) Lloyds Inspection Agency
3) Rina
4) Irs - International Register Of Shipping (Irs)
5) Dnv - Det Norske Veritas
6) Tcs - Tata Consultancy Services
7) Tuv India

Duplex S31803 / S32205 Flanges Application Industries

  • Off-Shore Oil Drilling Companies
  • Power Generation
  • Petrochemicals
  • Gas Processing
  • Specialty Chemicals
  • Pharmaceuticals
  • Pharmaceutical Equipment
  • Chemical Equipment
  • Sea Water Equipment
  • Heat Exchangers
  • Condensers
  • Pulp and Paper Industry

Types of Duplex Steel S31803 Flanges

Duplex S32205 Threaded Flanges
S31803 Duplex Steel Threaded Flanges
S32205 Duplex Steel Threaded Flanges
Duplex UNS S31803 Threaded Flanges
Duplex WERKSTOFF NR. 1.4462 Threaded Flanges
ASTM A182 Duplex Steel S31803 Threaded Flanges
Duplex Steel S31803 Ring Type Joint Flanges
S31803 Duplex Steel Ring Type Joint Flange
S32205 Duplex Steel RTJ Flanges
Duplex Steel UNS S32205 RTJ Flanges
Duplex WERKSTOFF NR. 1.4462 RTJ Flanges
BS4504 Duplex Steel S31803 RTJ Flanges
Duplex S31803 Long weld Neck Flanges
S31803 Duplex Long weld Neck Flanges
S31803 Duplex Steel Long weld Neck Flanges
Duplex UNS S31803 Long weld Neck Flanges
Duplex WERKSTOFF NR. 1.4462 Long weld Neck Flanges
ASTM A182 S31803 Duplex Steel Long weld Neck Flanges
Duplex S32205 Reducing Flanges
S31803 Duplex Steel Reducing Flanges
S32205 Duplex Steel Reducing Flange
Duplex UNS S31803 Reducing Flanges
Duplex WERKSTOFF NR. 1.4462 Reducing Flange
ASTM A182 Duplex Steel S31803 Reducing Flanges
Duplex S31803 Raised Face Blind Flanges
S32205 Duplex Steel Blind Flanges
S31803 Duplex Steel Blind Flange
Duplex UNS S32205 Blind Flanges
Duplex WERKSTOFF NR. 1.4462 Blind Flange
ASTM A182 S32205 Duplex Steel BLRF Flanges
Duplex Steel S32205 Forged Flanges
S31803 Duplex Steel Forged Flange
S31803 Duplex Steel Forged Flange
Duplex Steel UNS S32205 Forged Flanges
Duplex WERKSTOFF NR. 1.4462 Forged Flanges
ASTM A182 Duplex Steel S31803 Forged Flanges
Duplex Steel S31803 Orifice Flanges
S32205 Duplex Steel Orifice Flanges
S31803 Duplex Steel Orifice Flanges
Duplex UNS S2205 Orifice Flanges
Duplex  WERKSTOFF NR. 1.4462 Orifice Flanges
A182 S31803 Duplex Steel Orifice Flanges
Duplex S31803 Raised Face Slip On Flanges
S32205 Duplex Steel Slip On Plate Flanges
S31803 Duplex Steel Slip On Flanges
Duplex UNS S31803 Slip On Flanges
Duplex WERKSTOFF NR. 1.4462 45 SORF Flanges
ASME SA182 Duplex S31803 Slip On Flanges
Duplex Steel 2205 Socket weld Flanges
S31803 Duplex Steel Socket weld Flanges
S32205 Duplex Steel Socket weld Flanges
Duplex UNS S31803 Socket weld Flanges
Duplex WERKSTOFF NR. 1.4462 SWRF Flanges
ASME B16.5 S31803 Duplex Steel Socket weld Flanges
Duplex  S31803 Raised Face Weld Neck Flanges
S31803 Duplex Steel Weld Neck Flanges
S32205 Duplex Steel Weld Neck Flange
Duplex UNS S31803Weld Neck Flanges
Duplex WERKSTOFF NR. 1.4462 Weld Neck Flange
ASTM A182 S31803 Duplex Steel WNRF Flange

Duplex Steel S31803 Pipe Flanges, Duplex Steel S31803 Flanges, Duplex UNS S32205 Pipe Flanges, ANSI B16.5 Duplex Stainless Steel S31803 Orifice Flange, Duplex Steel S31803 Spectacle Blind Flanges, Duplex S31803 Slip On Flanges Supplier in Mumbai, India.

ASTM A182 Duplex S31803 Threaded Flanges, Duplex Steel Werkstoff No 1.4462 Socket Weld Flanges, Duplex Steel S31803 Nippolet Flanges, Duplex Steel S32205 RTJ Flange, Duplex SAF 2205 WNRF Flanges Exporter, Duplex S32205 Blind Flanges, Duplex 2205 Weld Neck Flange Dealer in India
ANSI B16.5 Duplex S31803 Ring Type Joint Flanges, Duplex Steel S31803 Nippo Flanges, Duplex Steel S32205 Industrial Flanges Stockholder, ASME SA182 Duplex S31803 Lap Joint Flange, Duplex Steel S32205 Screwed Flanges Stockist, Duplex Steel S31803 Spacer, S31803 Duplex Steel Forged Flanges Manufacturer.

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