Njabulo Stainless, located in Cape Town, South Africa, has earned a solid reputation as a reliable manufacturer and supplier of top-notch Stainless Steel 321 Tubing. With a strong focus on precision engineering and durability, this company delivers tubing solutions that align with global performance and reliability standards. Crafted for exceptional resistance to corrosion and oxidation, Njabulo Stainless’s 321 Tubing is perfect for high-temperature applications. Their commitment to innovation, quality assurance, and customer satisfaction has made them a go-to choice in sectors like petrochemical, automotive, and aerospace, both in South Africa and beyond.
Stainless Steel 321 Tubing is an austenitic stainless steel that’s stabilized with titanium to prevent carbide precipitation when exposed to high temperatures. Typically, it contains 17–19% chromium, 9–12% nickel, and titanium that is at least five times the carbon content. This alloy boasts impressive mechanical strength, with a tensile strength of about 515 MPa and a yield strength of 205 MPa. It also retains good ductility, hardness, and creep resistance, even under elevated temperatures. The titanium stabilization significantly boosts corrosion resistance, especially against intergranular attack after welding or extended heating.
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | Other | |
|---|---|---|---|---|---|---|---|---|---|---|---|
|
321 |
min.
max |
–
0.08 |
2.00 |
0.75 |
0.045 |
0.030 |
17.0
19.0 |
– |
9.0
12.0 |
0.10 |
Ti=5(C+N)
0.70 |
|
Grade |
Tensile Strength (MPa) min |
Yield Strength 0.2% Proof (MPa) min |
Elongation (% in 50mm) min |
Hardness |
|
|---|---|---|---|---|---|
|
Rockwell B (HR B) max |
Brinell (HB) max |
||||
|
321 |
515 |
205 |
40 |
95 |
217 |
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We provides highest quality standards for Stainless Steel 321 Tubing through processes of testing and certification. The products are checked with advanced tests for durability, corrosion resistance, and dimensional accuracy. Our tubing is certified internationally according to standards such as ASTM and ISO for reliability, performance, and the specific requirements of the industry.
Stainless Steel 321 seamless tubing resists oxidation and corrosion at high temperatures, offering excellent stability and durability. It’s ideal for aerospace, chemical, and high-temperature applications due to its strength and resistance.
Stainless Steel 321 welded tubing provides excellent resistance to high temperatures and corrosion, ideal for aerospace and chemical applications. It offers good weldability and stability, ensuring durability in demanding environments.
Stainless Steel 321 heat exchanger tubes offer superior resistance to high temperatures and corrosion, making them ideal for heat exchange applications in aggressive environments. They ensure durability and efficient thermal performance.
Stainless Steel 321 instrumentation tubing provides excellent resistance to high temperatures and corrosion, ensuring reliable performance in precise measurement and control systems. Its stability and strength make it ideal for critical applications.
Stainless Steel 321 boiler tubes offer high resistance to oxidation and corrosion at elevated temperatures, making them ideal for boiler systems. Their durability and strength ensure efficient heat transfer and long service life.
Stainless Steel 321 U-tubes provide excellent high-temperature resistance and corrosion protection, making them ideal for heat exchangers and condensers. Their durability and flexibility ensure reliable performance in challenging environments.
You’ll find Stainless Steel 321 Tubing widely used in industries that need materials capable of enduring high temperatures and corrosive conditions. It’s commonly found in exhaust manifolds, heat exchangers, furnace components, jet engine parts, and chemical processing equipment. Its outstanding resistance to oxidation and scaling makes it suitable for continuous operation at temperatures reaching up to 870°C. Additionally, it’s a preferred choice in petrochemical plants, refineries, and power generation facilities. The tubing’s strong mechanical properties and excellent weldability make it ideal for demanding applications where durability, reliability, and a long service life are crucial.
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