Rajgranth Metals & Alloys is a leading manufacturer and exporter of SS seamless tubes made from Super Duplex stainless steel are among the most reliable options. Crafted to offer superior strength, durability, and corrosion resistance, these tubes are essential in demanding environments. Specifically, tubes with a diameter of 21.3 mm and a 0.9 mm wall thickness offer the right balance between size and performance for a wide range of applications.
Super Duplex stainless steel is a type of alloy that combines the best features of both austenitic and ferritic stainless steels. The result is a metal that delivers high corrosion resistance, incredible strength, and enhanced durability. It’s called "Super" Duplex because it has even greater properties than standard Duplex stainless steel, particularly in terms of resistance to stress corrosion cracking, making it an ideal choice for challenging environments.
The production of seamless tubes begins with a solid steel billet, which is heated and pierced to create a hollow tube. The tube is then stretched and rolled to the desired dimensions. The lack of seams means there are no weak points, ensuring consistent strength throughout the tube's length.
The dimensions of SS seamless tubes play a significant role in determining their suitability for specific applications. A diameter of 21.3 mm is commonly used in systems where medium-sized flow is required, while a wall thickness of 0.9 mm provides enough strength without adding unnecessary weight.
This particular size is widely used because it fits well into both small and large-scale industrial systems. It’s flexible enough to be applied in compact spaces without compromising on flow capacity.
This size strikes a balance between capacity and compactness, ideal for use in various industrial processes where medium-level fluid or gas transport is necessary.
A tube wall thickness of 0.9 mm ensures that the tube remains light but durable, capable of withstanding moderate pressures while maintaining flexibility.
| 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 321, 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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