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.
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.
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.
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.
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.
A tube wall thickness of 0.9 mm ensures that the tube remains light but durable, capable of withstanding moderate pressures while maintaining flexibility.
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) | ||||||||||||
| 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 | |||||||||||
| 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 ( IN PERCENTAGE ) | ||||||||||
| 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. | ||||||||||
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:
| Our Stainless Steel Seamless Tube Used In Many Industries & Have Many Application |
| Stainless Steel Boiler Seamless Tubes |
| Stainless Steel Capillay Seamless Tubes |
| Stainless Steel ANSI/ASME Pipe |
| Stainless Steel Bimetalic Seamless Tubes |
| Stainless Steel Coiled Tubing |
| Stainless Steel Composite Seamless Tubes |
| Stainless Steel Condensor Seamless Tubes |
| Stainless Steel Ethylene Furnace Seamless Tubes |
| Stainless Steel Evaporator Seamless Tubes |
| Stainless Steel Finned Seamless Tubes |
| Stainless Steel Fuinace Seamless Tubes |
| 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 |
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