Home > Forged Fittings > Stainless Steel 321/321H Forged Fittings
Vinit Stainless is a well-known manufacturer and supplier of SS 321 forged fittings in Chennai, India. SS 321 is a titanium-stabilized austenitic stainless steel recognized for its superior intergranular corrosion resistance and stable performance in high-temperature applications. These forged fittings are designed for strength, durability, and weldability, suitable for demanding applications in various industries. Vinit Stainless offers SS 321 forged fittings in different configurations, all of which are produced as per international standards. These fittings are ideal for heat exchangers, exhaust systems, and chemical plants where heat and corrosive exposure is regular.
SS 321 forged fittings include 17–19% Chromium, 9–12% Nickel, and stabilizing with at least 5xC% Titanium. This addition of titanium avails resistance against the formation of chromium carbides, maintaining corrosion resistance following welding. SS 321 possesses tensile strength of approximately 515 MPa along with yield strength of 205 MPa. It also provides excellent ductility, thermal fatigue resistance, and creep strength. All these characteristics make SS 321 forged fittings suitable for extreme stress and heat conditions where mechanical performance and long-time corrosion resistance are of utmost importance.
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.
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.
SS321 forged fittings are extensively utilized in heat-exposed and corrosive applications like aerospace exhaust systems, furnace parts, thermal oxidizers, and chemical facilities. The fittings are suitable for welded piping systems where frequent heating and cooling take place. They find applications in refineries, power stations, and the food processing sector where scaling as well as stress cracking resistance is required. Their stabilized chemistry in titanium ensures intergranular corrosion resistance and renders them exceptionally useful in piping systems carrying high-temperature fluids or gases.
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