Duplex Stainless Steel Pipe Schedule Chart / Dimensions
duplex steel pipes, duplex steel pipe dimensions, duplex steel pipe supplier, duplex stainless steel pipe, duplex stainless steel pipe specification, duplex stainless steel pipe schedule chart, duplex stainless steel pipe schedule, duplex stainless steel pipe suppliers, duplex stainless steel pipe and fittings, duplex stainless steel pipe astm
CHECK LATEST PRICE OF : SS 304 ROUND BAR
super duplex stainless steel pipe schedule chart, duplex stainless steel pipe dimensions, super duplex stainless steel pipe dimensions, super duplex stainless steel pipe fittings, duplex stainless steel pipe grades, super duplex stainless steel pipe grades, duplex stainless steel pipe in india, duplex stainless steel pipe in mumbai
duplex stainless steel pipe manufacturer, duplex stainless steel pipe material, super duplex stainless steel pipe manufacturer, duplex stainless steel pipe price, duplex stainless steel pipe pressure rating, duplex stainless steel pipe properties, super duplex stainless steel pipe properties, duplex stainless steel pipe roughness, duplex steel seamless pipe, duplex stainless steel seamless pipe, duplex stainless steel pipe wall thickness, duplex stainless steel pipe weight
DUPLEX 2205 : ASTM A 182, A 240, A 276, A 789, A 790, A 815, UNS S31803, S32205, NACE MR0175
Forms of Duplex 2205 Available at Raaj Sagar Steels
- Sheet
- Plate
- Bar
- Pipe & Tube (welded & seamless)
- Fittings (i.e. flanges, slip-ons, blinds, weld-necks, lapjoints, long welding necks, socket welds, elbows, tees, stub-ends, returns, caps, crosses, reducers, and pipe nipples)
- Welding Wire and Welding Electrode
2205 Duplex Overview
Duplex 2205 is a nitrogen enhanced duplex stainless steelthat was developed to combat common corrosion problems encountered with the 300 series stainless steels. “Duplex” describes a family of stainless steels that are neither fully austenitic, like 304 stainless, nor purely ferritic, like 430 stainless. The structure of 2205 duplex stainless steel consists of austenite pools surrounded by a continuous ferrite phase. In the annealed condition, 2205 contains approximately 40-50% ferrite. Often referred to as the work horse grade, 2205 is the most widely used grade in the duplex family of stainless steels.
The advantage of a duplex structure is that it combines the favorable qualities of a ferritic alloy (stress corrosion cracking resistance and high strength) with those of an austenitic alloy (ease of fabrication and corrosion resistance).
Usage of 2205 Duplex stainless steel should be limited to temperatures below 600° F. Extended elevated temperature exposure can embrittle 2205 stainless.
Corrosion Resistance
2205 duplex stainless steel is a cost effective solution for many applications where the 300 series stainless steels are susceptible to chloride stress corrosion cracking. Stress corrosion cracking occurs when stainless steels are subjected to tensile stress, while in contact with solutions containing chlorides. Increasing temperatures also increase the susceptibility of stainless steels to stress corrosion cracking.
The combination of chromium, molybdenum and nitrogen convey the good resistance of 2205 to chloride pitting and crevice corrosion. This resistance is extremely important for services such as marine environments, brackish water, bleaching operations, closed loop water systems and some food processing applications. The high chromium, molybdenum and nitrogen contents of 2205 provide corrosion resistance superior to common stainless steels, such as, 316L and 317L in most environments.
Chemical Composition, %
Cr | Ni | Mo | C | N |
|---|---|---|---|---|
22.0-23.0 | 4.50-6.50 | 3.00-3.50 | .030 Max | 0.14-0.20 |
Mn | Si | P | S | Fe |
2.00 Max | 1.00 Max | .030 Max | .020 Max | Balance |
What are the characteristics of Duplex 2205?
- High resistance to chloride stress corrosion cracking
- Resistance to chloride pitting and crevice corrosion
- Good general corrosion resistance
- Good sulfide stress corrosion resistance
- High Strength
- Good weldability and workability
In what applications is Duplex 2205 used?
- Chemical process vessels, piping and heat exchangers
- Pulp mill digesters, bleach washers, chip pre-steaming vessels
- Food processing equipment
- Oil field piping and heat exchangers
- Flue gas desulfurization equipment
ASTM Specifications
Pipe Smls | Pipe Welded | Tube Smls | Tube Welded | Sheet/Plate | Bar | Flanges, Fittings & Valves |
|---|---|---|---|---|---|---|
A790 | A790 | A789 | A789 | A240 | A276 | A182 |
Mechanical Properties
Specified Tensile Properties ASTM A240
| .2% Yield Strength, ksi Minimum | Hardness Max. |
|---|---|---|
95 | 65 | 31 Rockwell C |
Stainless Steel Duplex 2205, UNS S31803, UNS S32205, WNR 1.4462 Stainless Steel Pipes, Tube Stock and Supply Range
| Sr. No. | Product Description | Outside Diamter, OD (in mm) | Wall Thickness, WT (in mm) |
| 1 | Duplex Stainless Steel Round Pipe/Tube | 6mm – 630mm | 0.5mm-30mm |
| 2 | Duplex Stainless Steel Square Pipe/Tube | 12.7mm* 12.7mm to 300mm* 300mm | 0.5mm-30mm |
| 3 | Duplex Stainless Steel Rectangular Pipe/Tube | 10*20mm to 100*200mm | 0.5mm-30mm |
| 4 | Duplex Stainless Steel Colour Coated Pipe/Tube | 6mm to 630mm | 0.5mm-30mm |
| 5 | Duplex Stainless Steel Ornamental Tubes | 12.7mm to 76.2mm | 0.5mm-2.0mm |
| 6 | Duplex Stainless Steel Electropolished Pipes/Tubes | 12.7mm to 250mm | 0.5mm-30mm |
| 7 | Duplex Stainless Steel Slot Round Pipe/Tube | 12.7mm to 76.2mm | 0.5mm-2.0mm |
| 8 | Duplex Stainless Steel Triangle Tube | 16mm to 85mm | 0.5mm-3.0mm |
| 9 | Duplex Stainless Steel Hexagonal Tube | 13mm to 85mm | 0.5mm-2.0mm |
| 10 | Duplex Stainless Steel Handrail Tube | – | 0.5mm-2.0mm |
| 11 | Duplex Stainless Steel U Shaped Tube | 20mm to 200mm | 0.5mm-2.0mm |
| 12 | Duplex Thin-Wall Stainless Steel Tube | 22mm*0.7mm to 108mm*2.0mm | 0.5mm-2.0mm |
| 13 | Duplex Inner/Outside Polished Stainless Steel Tube, Pipes | 12.5mm to 203.2mm | 1.0mm – 5mm |
| 14 | Duplex Stainless Steel Capillary Tube | 0.28mm to 10mm | 0.08mm – 1.2mm |
| 15 | Duplex Stainless Steel Seamless Tube | 6mm to 430mm | 0.8mm – 30mm |
Specifications of Duplex Stainless Steel Pipes/Tubes:
1. Standard: ASTM
2. Grade: 630 / 631 / 2205 / 2507 / 17-4PH
ASTM A789, ASTM A790, ASTM A450, ASTM A530,
GB/T 14976, GB/T 14975, GB/T 13296, etc
3. OD: 8mm-1000mm
4. Wall thickness: 0.3mm-30mm
5. Length: max.18000mm or as demand
6. Surface finish: Polishing (180#,220#,240#,320#400#,600#), Hairline, acid pickled, etc.
Alloy Designations
- Grade UNS 31803 is similar to:
- 2205
- EN 1.4462Z
- UNS S31803
- UNS S32205
- BS 318S13
Supplied Forms
- Fittings & Flanges
- Pipe
- Plate
- Sheet
- Tube
- Bar
Applications
Duplex stainless steels are typically used in:
- ~ Chemical processing, transport and storage
- ~ Oil and gas exploration and offshore rigs
- ~ Oil and gas refining
- ~ Marine environments
- ~ Pollution control equipment
- ~ Pulp & paper manufacturing
- ~ Chemical process plant
Corrosion Resistance
Duplex stainless steels are extremely corrosion resistant. They have high resistance to intergranular corrosion. Even in chloride and sulphide environments, duplex stainless steels exhibit very high resistance to stress corrosion cracking.
The super duplex grades are even more resistant to corrosion.
Heat Resistance
The high chromium content of duplex stainless steels that protects against corrosion, causes embrittlement at temperatures over about 300°C.
At low temperatures duplex stainless steels have better ductility than the ferritic and martensitic grades. Duplex grades can readily be used down to at least -50°C.
Fabrication
Fabrication of all stainless steels should be done only with tools dedicated to stainless steel materials. Tooling and work surfaces must be thoroughly cleaned before use. These precautions are necessary to avoid cross contamination of stainless steel by easily corroded metals that may discolour the surface of the fabricated product.
Machinability
Although machinable, the high strengths of duplex stainless steels makes machining difficult. As an example, machining of 2205 is around 20% slower than for 304.
Machining can be enhanced by using the following rules:
- ~ Cutting edges must be kept sharp. Dull edges cause excess work hardening.
- ~ Cuts should be light but deep enough to prevent work hardening by riding on the surface of the material.
- ~ Chip breakers should be employed to assist in ensuring swarf remains clear of the work
- ~ Low thermal conductivity of austenitic alloys results in heat concentrating at the cutting edges. This means coolants and lubricants are necessary and must be used in large quantities.
Heat Treatment
- Duplex stainless steels cannot be hardened by heat treatment. They can however be work hardened.
- Solution treatment or annealing can be done by rapid cooling after heating to around 1100°C.
Weldability
Duplex stainless steels have good weldability. All standard welding processes can be used. They are not quite as easily welded as the austenitic grades but low thermal expansion in duplex grades reduces distortion and residual stresses after welding. The recommended filler material for 2205 stainless steel is 2209.
If you don’t see what you’re looking for just call one of our team members at +91-22-6659 5285 Or Mail Us inquiry@raajsagarsteels.com. No inquiry is too large or too small, we specialize in locating hard to find items. If you do see what you are looking, we would love to assist you and give you a quote today!
24 Hrs. Online Whatsapp Number Contact Person: Mr. Milap Mehta - Cell: +91-9869 532 584