Home > Forged Fittings > Stainless Steel 321/321H Forged Fittings
Mbemba Stainless is a reputable manufacturer and supplier located in Kinshasa, Congo, with a focus on high-quality Stainless Steel 321/321H Forged Fittings. The company has built a solid reputation for providing precision-engineered fittings that adhere to global standards for both performance and durability. Thanks to their state-of-the-art production facilities and rigorous quality control measures, Mbemba Stainless guarantees that every product boasts exceptional resistance to corrosion, impressive high-temperature strength, and precise dimensional accuracy. Their Stainless Steel 321/321H Forged Fittings are perfect for challenging industrial settings, making Mbemba Stainless the go-to choice for customers in search of dependable stainless steel solutions, both in Congo and on the international stage.
Stainless Steel 321/321H Forged Fittings are titanium-stabilized austenitic alloys primarily made up of iron, 17–19% chromium, 9–12% nickel, and up to 0.7% titanium. The 321H grade features a higher carbon content, which boosts its strength and creep resistance at elevated temperatures. These fittings are known for their outstanding oxidation and corrosion resistance, particularly in high-temperature situations. On the mechanical side, they deliver a tensile strength of about 515 MPa, a yield strength of 205 MPa, and good elongation, ensuring they remain tough and stable even under thermal stress.
Specifications ASTM A182 & ASME SA182
Standard ASME 16.11, MSS SP-79, 83, 95, 97, BS 3799
Size 1/8” NB to 4” NB (Socketweld & Screwed-Threaded)
Class 2000 LBS, 3000 LBS, 6000 LBS, 9000 LBS
Type Socketweld Fittings, Screwed-Threaded Fittings
Forged Fittings Items : 45 Deg Elbow, 90 Deg Elbow, Forged Tee, Union, Full Coupling, Half Coupling, Cross, Cap, Swage Nipple, Plug, Bush, Welding Boss, Hexagonal Nipple etc.
Type Socketweld Fittings, Screwed-Threaded Fittings
Grade 321 / 321H UNS (S32100, S32109), DIN (1.4541, 1.4878)
| Grade | C | Mn | Si | P | S | Cr | N | Ni | Ti |
| SS 321 | 0.08 max | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 17.00 – 19.00 | 0.10 max | 9.00 – 12.00 | 5(C+N) – 0.70 max |
| SS 321H | 0.04 – 0.10 | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 17.00 – 19.00 | 0.10 max | 9.00 – 12.00 | 4(C+N) – 0.70 max |
| Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 8.0 g/cm3 | 1457 °C (2650 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 35 % |
Contact us to get a quick quote for your requirement.
At Mbemba Stainless, each stainless steel 321/321H forged fitting undergoes rigorous testing for excellent quality and performance. Our products are certified to meet international standards, including ISO and ASTM. Tests include material authentication, water testing and non-destructive analysis to ensure durability, reliability and compliance for critical industrial applications around the world.
These fittings, available in sizes from 1/8″ to 4″, are designed for high-pressure applications with socket weld connections. They offer excellent resistance to oxidation and corrosion due to their high chromium and nickel content. Ideal for elevated temperature environments.
Threaded fittings in 321 stainless steel come in sizes ranging from 1/8″ to 6″. They provide superior resistance to intergranular corrosion, making them suitable for high-temperature and pressure applications. The threaded design ensures a secure, leak-proof connection.
This 45-degree elbow, available from 1/2″ to 4″, is used to change the direction of piping. It maintains high corrosion resistance and strength under elevated temperatures, making it suitable for critical, high-stress applications.
The threaded tee, with sizes from 1/8″ to 6″, allows for branch connections at a 90-degree angle. It is designed for high resistance to heat and corrosive environments, ensuring reliability and durability in demanding conditions.
Available in sizes ranging from 1/8″ to 4″, this half coupling provides a secure connection between two pipes. It is crafted to withstand oxidation and corrosion, making it ideal for high-temperature applications.
The socket weld cross, available from 1/2″ to 4″, connects four pipes at right angles. It features high resistance to thermal and chemical stresses, ensuring long-lasting performance in extreme conditions.
Stainless Steel 321/321H Forged Fittings find extensive use in applications that demand resistance to intergranular corrosion and high-temperature oxidation. They are commonly utilized in sectors like petrochemical, power generation, oil and gas, and pharmaceuticals. These fittings are particularly well-suited for heat exchangers, boiler tubes, exhaust manifolds, and chemical processing systems that operate under continuous heat exposure. Their remarkable durability, ease of welding, and resistance to scaling make them ideal for both high-pressure and corrosive environments, ensuring they deliver long-lasting performance and reliability in critical industrial operations.
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