The item
Super Duplex seamless Tubes with an outside diameter of 31.7 mm and a wall thickness of 0.9 mm. Roughly equal austenite and ferrite. Around twice the yield strength of 316L.
Super Duplex Seamless TubesIn stock
Super Duplex seamless tubes
OD 31.7 mm × 0.9 mm wall
This is a size we hold rather than one we have to roll. Roughly equal austenite and ferrite. Around twice the yield strength of 316L. Supplied with a mill test certificate to EN 10204 3.1 as standard.
OD 31.7 mm × 0.9 mm wallUNS S31803 / S32205 / S32550 / S32750 / S32760EN 1.4462 / 1.4507 / 1.4501HSN 7304
Properties
Duplex- PREN
- 41
- Relative cost
- 2.60×
- Max service temp
- 300 °C
- Magnetic
- Partially
- Weldability
- Procedure required
- Machinability
- Difficult
Pitting resistance equivalent. Higher resists chlorides better.
Indexed to 304. Indicative, for specification triage.
01Product description
Super Duplex stainless steel seamless Tubes, OD 31.7 mm × 0.9 mm wall: stockist and supplier in Mumbai
Rajgranth Metal & Alloys stocks and supplies Super Duplex seamless Tubes, OD 31.7 mm × 0.9 mm wall from Mumbai, with the material, tests and documentation covered by our ISO 9001:2015 quality system. Rajgranth Metal & Alloys has been trading since 1980, is self-funded and debt-free, and despatches most orders from its Mumbai stockyard within two days.
Grade and designations
Duplex and Super Duplex Stainless Steel, designated UNS S31803 / S32205 / S32550 / S32750 / S32760, EN 1.4462 / 1.4507 / 1.4501, AISI F51 / F60 / F53 / F55, JIS SUS329J3L, GB S22053 and Werkstoff X2CrNiMoN22-5-3 / X2CrNiMoCuWN25-7-4.
Standards and finishes
Standards include ASTM A213 / ASME SA-213, ASTM A269, ASTM A312 / ASME SA-312, ASTM A376 / ASME SA-376, ASTM A789 / ASME SA-789, ASTM A790 / ASME SA-790, ASTM A268 / ASME SA-268 and ASTM A511. Finishes and conditions include Bright Annealed (CFA), Solution Annealed (CFD), Electro Polished (EP), Polished (APP), Annealed and Pickled (AP), Mirror Polish, Matt Polish and Cold Drawn.
Where it is used
offshore and subsea piping, seawater cooling and desalination, chemical tankers and cargo systems, sour gas service and pressure vessels where weight matters. We supply across India and export to markets in the Middle East, Africa, Europe, Asia, North America and South America.
Ordering
Send the quantity, standard and any special requirement and we will confirm availability. Material is supplied with documentation, tested in house across 18 listed testing facilities, and covered by our ISO 9001:2015 quality management system.
Also searched as
- super Duplex seamless Tubes, OD 31.7 mm × 0.9 mm wall supplier
- Super Duplex 31.7 mm seamless Tubes stockist in Mumbai
- stainless Steel Seamless Tubes 31.7 mm
This size
07 rows- Grade
- Super Duplex
- Product
- Seamless Tubes
- Outside diameter
- 31.7 mm
- Wall thickness
- 0.9 mm
- Length
- 5 m6.5 m
Cut to length on request
- Ends
- PlainBevelled
- Certification
- EN 10204 3.1
3.2 with third-party inspection on request
Other sizes in this grade are supplied to order — usually from stock.
Surface finishes
08- Bright Annealed (CFA)
- Solution Annealed (CFD)
- Electro Polished (EP)
- Polished (APP)
- Annealed and Pickled (AP)
- Mirror Polish
- Matt Polish
- Cold Drawn
Standards
10- ASTM A213 / ASME SA-213
- ASTM A269
- ASTM A312 / ASME SA-312
- ASTM A376 / ASME SA-376
- ASTM A789 / ASME SA-789
- ASTM A790 / ASME SA-790
- ASTM A268 / ASME SA-268
- ASTM A511
- ASTM B163 / ASME SB-163
- ASTM B407 / ASME SB-407
01Also held
Other Super Duplex seamless tubes sizes
Complete technical reference
SS Seamless Tubes Grade Super Duplex Diameter 31.7mm X 0.9mm Thickness
The full detail for this product as supplied from our Mumbai stockyard: sizes, grades, standards, tolerances, tests and applications.
SS Seamless Tubes Grade Super Duplex Diameter 31.7mm X 0.9mm Thickness Stockholders, Suppliers & Exporters in India.
Rajgranth Metals is a well-known manufacturers, stockholders & exporters of ss seamless tubes are widely used across various industries due to their superior strength, durability, and ability to withstand harsh environments. Unlike welded tubes, seamless tubes are produced without a seam or weld joint, resulting in higher resistance to pressure and mechanical stress. These tubes are critical in applications where safety, performance, and precision are non-negotiable, such as in the oil and gas sector, chemical processing plants, and marine industries.
Super Duplex stainless steel is a high-performance alloy that combines the benefits of both austenitic and ferritic stainless steels. Known for its exceptional strength and corrosion resistance, Super Duplex has a balanced composition of chromium, nickel, and molybdenum, providing excellent resistance to pitting, crevice corrosion, and stress corrosion cracking. This makes it ideal for demanding applications where high mechanical properties and resistance to corrosive environments are required.
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Why Diameter 31.7 mm Is Important
The 31.7 mm diameter is particularly useful in applications where precise fluid or gas flow is essential. This size is commonly used in industries like chemical processing and oil & gas, where control over flow rates is critical to the efficiency of operations. The smaller diameter also makes the tubes easier to install in compact spaces, further enhancing their versatility.
Characteristics of Super Duplex Steel
Super Duplex steel is a special class of stainless steel known for its high strength and superior corrosion resistance. It is a combination of austenitic and ferritic steel, which gives it its unique properties. The “super” in Super Duplex comes from its increased resistance to various forms of corrosion, especially pitting, crevice corrosion, and stress corrosion cracking.
Key Characteristics of Seamless Tubes
- No welds or seams: ensuring uniformity and strength.
- Higher pressure ratings compared to welded tubes.
- Superior strength : compared to welded tubes.
Benefits of 0.9 mm Thickness in Super Duplex Seamless Tubes
The 0.9 mm wall thickness offers a perfect balance between strength and lightness. This thickness ensures that the tube is strong enough to handle high pressures, while still being lightweight enough for easy transportation and installation. Additionally, the thin wall reduces material costs and makes the tubes more energy-efficient during manufacturing and use, especially in applications requiring heat transfer.
Manufacturing Process of SS Seamless Tubes
SS seamless tubes are produced through a series of processes that ensure precision and high quality. The manufacturing process typically begins with the extrusion of a solid billet, followed by hot or cold drawing to achieve the desired dimensions. For Super Duplex stainless steel tubes, advanced technology is used to ensure that the high standards required by industries like oil and gas are met. Precision is key in ensuring that the tubes can withstand extreme conditions without compromising performance.
Significance of 0.9 mm Thickness:
A tube wall thickness of 0.9 mm ensures that the tube remains light but durable, capable of withstanding moderate pressures while maintaining flexibility.
Properties of Super Duplex Steel for Seamless Tubes
Chemical Composition of Super Duplex Steel
Super Duplex stainless steel typically contains about 25% chromium, 4% molybdenum, and 7% nickel, along with nitrogen. This composition is key to its superior performance, particularly its resistance to corrosion.
Stainless Steel Tubes Dimension – (S.S. Tubes)
19 entries
| Stainless Steel Tubes Dimension – (S.S. Tubes) | 13 | 1 | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wall thickness in mm. | 0.5 | 0.6 | 0.7 | 0.8 | 1 | 1.2 | 1.6 | 2 | 2.6 | 3 | 3.2 | 3.6 |
| O.D. in mm. | Weight in kg/meter | 12 | 1 | |||||||||
| 6 | 0.069 | 0.081 | 0.093 | 0.104 | 0.125 | 0.144 | 0.176 | – | – | – | – | – |
| 9.52 | 0.112 | 0.134 | 0.154 | 0.174 | 0.213 | 0.249 | 0.317 | – | – | – | – | – |
| 10 | 0.119 | 0.141 | 0.163 | 0.184 | 0.225 | 0.264 | 0.336 | – | – | – | – | – |
| 12.7 | 0.153 | 0.182 | 0.21 | 0.238 | 0.293 | 0.345 | 0.444 | – | – | – | – | – |
| 14 | 0.169 | 0.201 | 0.233 | 0.264 | 0.325 | 0.384 | 0.496 | – | – | – | – | – |
| 15.87 | 0.192 | 0.229 | 0.266 | 0.301 | 0.372 | 0.44 | 0.571 | 0.694 | – | – | – | – |
| 19 | 0.231 | 0.276 | 0.32 | 0.364 | 0.45 | 0.534 | 0.696 | 0.85 | 1.066 | 1.2 | 1.264 | – |
| 25 | 0.306 | 0.366 | 0.425 | 0.484 | 0.6 | 0.714 | 0.936 | 1.15 | 1.456 | 1.65 | 1.744 | 1.926 |
| 25.4 | 0.311 | 0.372 | 0.432 | 0.492 | 0.61 | 0.726 | 0.952 | 1.17 | 1.482 | 1.68 | 1.776 | 1.962 |
| 31.8 | – | – | – | – | – | 0.918 | 1.208 | 1.49 | 1.898 | 2.16 | 2.288 | 2.538 |
| 38 | – | – | – | – | – | 1.104 | 1.456 | 1.8 | 2.301 | 2.625 | 2.784 | 3.096 |
| 44.5 | – | – | – | – | – | 1.299 | 1.716 | 2.125 | 2.724 | 3.113 | 3.304 | 3.681 |
| 50.8 | – | – | – | – | – | 1.488 | 1.968 | 2.44 | 3.133 | 3.585 | 3.808 | 4.248 |
| 63.5 | – | – | – | – | – | – | 2.476 | 3.075 | 3.959 | 4.538 | 4.824 | 5.391 |
| 76.1 | – | – | – | – | – | – | 2.98 | 3.705 | 4.778 | 5.483 | 5.832 | 6.525 |
| 101.6 | – | – | – | – | – | – | 4 | 4.98 | 6 | 7 | 7,872 | 8.82 |
Chemical Composition
22 entries
| CHEMICAL COMPOSITION ( IN PERCENTAGE ) | 11 | 1 | ||||||||
| Grade | C (Max) | Mn (Max) | P (Max) | S (Max) | Si (Max) | Cr | Ni | Mo | Nitrogen (Max) | Cu/ Others |
| 301 | 0.15 | 2 | 0.045 | 0.03 | 1 | 16.00 – 18.00 | 6.00 – 8.00 | – | 0.1 | – |
| 304 | 0.08 | 2 | 0.045 | 0.03 | 0.75 | 18.00 – 20.00 | 8.00- 10.50 | – | 0.1 | – |
| 304L | 0.03 | 2 | 0.045 | 0.03 | 0.75 | 18.00 – 20.00 | 8.00- 12.00 | – | 0.1 | – |
| 310S | 0.08 | 2 | 0.045 | 0.03 | 1.5 | 24.00- 26.00 | 19.00 – 22.00 | – | – | – |
| 316 | 0.08 | 2 | 0.045 | 0.03 | 0.75 | 16.00 – 18.00 | 10.00 – 14.00 | 2.00 – 3.00 | 0.1 | – |
| 316L | 0.03 | 2 | 0.045 | 0.03 | 0.75 | 16.00 – 18.00 | 10.00 – 14.00 | 2.00 – 3.00 | 0.1 | – |
| 317 | 0.08 | 2 | 0.045 | 0.03 | 0.75 | 18.00 – 20.00 | 11.00 – 14.00 | 3.00 – 4.00 | 0.1 | – |
| 317L | 0.03 | 2 | 0.045 | 0.03 | 0.75 | 18.00 – 20.00 | 11.00 – 15.00 | 3.00 – 4.00 | 0.1 | – |
| 321 | 0.08 | 2 | 0.045 | 0.03 | 0.75 | 17.00 – 19.00 | 9.00 – 12.00 | – | 0.1 | Ti5 ( C + N ) Min or 0.70 max |
| 347 | 0.08 | 2 | 0.045 | 0.03 | 0.75 | 17.00 – 19.00 | 9.00 – 13.00 | – | – | Cb= 10x ( C Min ) or 1.00 Max |
| 409 | 0.08 | 1 | 0.04 | 0.01 | 1 | 10.50 – 11.75 | 0.5 | – | – | Ti= 6x (C+ N ) Min or 0.70 Max |
| 409M | 0.03 | 0.81.2 | 0.03 | 0.03 | 0.40.75 | 11.00- 12.00 | 1.5 max. | – | – | Ti= 6x (C) Min or 0.70 Max |
| 410S | 0.08 | 1 | 0.04 | 0.03 | 1 | 11.50- 13.50 | 0.6 | – | – | – |
| 410 | 0.15 | 1 | 0.04 | 0.03 | 1 | 11.50- 13.50 | 0.75 | – | – | – |
| 420 | 0.35 | 0.5 | 0.035 | 0.015 | 0.5 | 12.00 – 13.00 | 0.20.3 | – | – | – |
| 430 | 0.12 | 1 | 0.04 | 0.03 | 1 | 16.00 – 18.00 | 0.75 | – | – | – |
| JSL AUS | 0.08 | 7.08.0 | 0.07 | 0.03 | 0.75 | 15.50 – 16.50 | 4.25 – 4.75 | – | – | 0.9 – 1.10 |
| JS- 203 | 0.08 | 9.2510.25 | 0.07 | 0.03 | 0.75 | 14.25 – 15.25 | 2.25 – 2.75 | – | – | 1.60- 2.0 |
| 301M | 0.1 | 4.55.5 | 0.06 | 0.03 | 0.75 | 14.50 – 15.50 | 6.0 – 7.0 | – | – | 1.70- 1.90 |
| * Thickness of 1.27mm & below will have elongation of 20% min. | 11 | 1 |
|---|
Applications of SS Seamless Tubes Grade Super Duplex
42 entries
Stainless steel seamless tubes, particularly those made from Grade Super Duplex , are used across a wide range of industries. Some of the most common applications include:
- Heat Exchangers and Boilers: Grade Super Duplex 's resistance to high temperatures makes it ideal for these applications.
- Automotive Industry: Grade Super Duplex 's resistance to high temperatures makes it ideal for these applications.
- Chemical Processing Plants: Grade Super Duplex 's resistance to high temperatures makes it ideal for these applications.
- Aerospace: Grade Super Duplex 's resistance to high temperatures makes it ideal for these applications.
Our Stainless Steel Seamless Tube Used In Many Industries & Have Many Application
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- Stainless Steel ANSI/ASME Pipe
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- Stainless Steel Gasoline Direct Injection Seamless Tubes
- Stainless Steel Heat Exchanger Seamless Tubes
- Stainless Steel High Pressure Seamless Tubes
- Stainless Steel MTC in accordance with EN10204 NACE 3.1
- Stainless Steel Automotive Aftermarket Direct Injection: Diesel-Tested, Gasoline-Approved
- Stainless Steel High Temperature Seamless Tubes
- Stainless Steel Hollow Bar
- Stainless Steel Hydraulic Tubing
- Stainless Steel Instrumentation Tubing
- Stainless Steel ISO/EN Seamless Tubes
- Stainless Steel Lance Seamless Tubes
- Stainless Steel Mechanical Seamless Tubing
- Stainless Steel Medical Seamless Tube
- Stainless Steel Muffle Seamless Tubes
- Stainless Steel Nuclear Fuel Seamless Tubes
- Stainless Steel Nuclear Steam Generation Tubing
- Stainless Steel Precision Seamless Tubes
- Stainless Steel Recupertor Seamless Tubes
- Stainless Steel Reheater Seamless Tubes
- Stainless Steel Scrubber Seamless Tubes
- Stainless Steel Steam Generation Seamless Tubes
- Stainless Steel Stripper Seamless Tubes
- Stainless Steel Subsea Seamless Tubes
- Stainless Steel Superheater Seamless Tubes
- Stainless Steel Thermocouple Seamless Tubes
- Stainless Steel Umbilical Seamless Tubes
Duplex / Super Duplex applications
05- Offshore and subsea piping
- Seawater cooling and desalination
- Chemical tankers and cargo systems
- Sour gas service
- Pressure vessels where weight matters
Super Duplex seamless tubes, OD 31.7 mm × 0.9 mm wall.
Tell us the quantity and where it is going. We will confirm stock and come back with price the same working day.