Home > Forged Fittings > Stainless Steel 321/321H Forged Fittings
Harsh Metalloys is a reputable manufacturer and supplier of Stainless Steel 321/321H forged fittings, proudly based in Mumbai, India. We specialize in providing top-notch stainless steel solutions that are engineered for outstanding performance in high-temperature and corrosive settings. Our SS 321/321H forged fittings are crafted from premium-grade materials and precision engineering, ensuring they meet international quality standards. With years of experience under our belt and a solid reputation for excellence, Harsh Metalloys caters to various industries, including petrochemical, power generation, thermal processing, and aerospace. Our dedication to durability, prompt delivery, and customer satisfaction has established us as a trusted name for stainless steel products both in India and around the globe.
The Stainless Steel 321/321H forged fittings are made from an austenitic stainless steel alloy that contains 17–19% chromium and 9–12% nickel, with titanium added to prevent intergranular corrosion. The 321H variant features a higher carbon content, which boosts its creep strength and high-temperature resilience. These fittings provide a tensile strength of about 515 MPa and a yield strength of roughly 205 MPa. They also showcase excellent oxidation resistance up to 870°C, along with good weldability and mechanical stability. SS 321/321H forged fittings are perfect for high-stress environments where consistent strength and thermal resistance are crucial.
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 Harsh Metalloys, 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.
These fittings are commonly used in high-temperature and high-pressure applications, such as heat exchangers, boilers, superheaters, pressure vessels, and exhaust systems. They play a vital role in petrochemical processing, oil and gas refineries, aerospace systems, and thermal equipment. With their ability to maintain mechanical integrity under prolonged heat exposure, they resist scaling, oxidation, and thermal fatigue. Their outstanding corrosion resistance in oxidizing environments makes them ideal for tough industrial conditions. SS 321/321H forged fittings are a dependable choice for industries that demand durable, heat-resistant, and corrosion-resistant solutions.
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