Home > Forged Fittings > Stainless Steel 321/321H Forged Fittings
Stainless Steel 321/321H forged fittings are produced by top suppliers in Dubai and India to meet demands for heat-resistant and corrosion-resistant connections. These fittings, including elbows, tees, couplings, and unions, are made from titanium-stabilized austenitic stainless steel, providing excellent strength and weldability. Grade 321H, which has a higher carbon content, is ideal for applications needing better creep resistance. Manufactured according to ASTM A182 standards, these forged fittings ensure tight sealing and long-lasting durability in systems with high temperatures and pressures. They are well-suited for petrochemical plants, refineries, marine engineering, and thermal processing.
SS 321/321H contains 17–19% chromium, 9–12% nickel, and titanium for stabilization (≥5×C%). 321H has more carbon (0.04–0.10%) than 321 (≤0.08%) to improve high-temperature strength. The alloy’s tensile strength ranges from 515–620 MPa, with a yield strength around 205 MPa and elongation of about 35%. Titanium stabilization prevents intergranular corrosion after welding, while 321H retains its structural integrity at temperatures up to 870°C. These forged fittings maintain excellent mechanical performance in welding, forming, and prolonged high-heat exposure, making them reliable solutions in tough service environments.
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 Harshita 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.
SS 321/321H forged fittings are used in high-temperature settings like heat exchangers, steam piping, chemical reactors, and equipment in oil refineries. Their resistance to intergranular corrosion makes them suitable for welded assemblies that face frequent thermal cycles. The 321H variant is preferred where greater creep resistance and strength at high temperatures are needed. Common sectors include aerospace, thermal processing, marine exhaust systems, and high-pressure steam networks. These forged fittings offer leak-tight, corrosion-resistant, and heat-tolerant connections, essential for dependable piping systems in challenging operational conditions.
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