Home > Forged Fittings > Stainless Steel 321/321H Forged Fittings
Chanchai Stainless is a top-notch stainless steel manufacturer and supplier based in Bangkok, Thailand. They specialize in high-quality Stainless Steel 321 / 321H Forged Fittings, which are built to last and perform well under high temperatures. The Grade 321 is titanium-stabilized, making it resistant to intergranular corrosion during welding. On the other hand, Grade 321H has a higher carbon content, giving it better creep strength and stress-rupture resistance. These fittings are crafted to ensure secure, leak-proof connections in piping systems that face tough service conditions. With precision manufacturing and strict quality standards, Chanchai Stainless delivers 321 / 321H forged fittings that meet global standards, serving industries like petrochemical, chemical, power generation, and food processing with reliability.
Stainless Steel 321 / 321H Forged Fittings are made up of 17–19% chromium, 9–12% nickel, and titanium stabilization, which helps prevent carbide precipitation and boosts weldability. Grade 321H, with its higher carbon content, offers enhanced creep and stress-rupture strength for extended high-temperature use. Both grades have a tensile strength of about 515 MPa and a yield strength of 205 MPa, along with excellent oxidation resistance up to 900°C. Their toughness, hardness, and stability hold up well under harsh operating conditions, ensuring dependable performance in piping systems where corrosion resistance and thermal durability are essential.
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 Chanchai 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 their place in various industries that need strong and durable piping connections in high heat and corrosive settings. They are commonly used in boilers, heat exchangers, condensers, superheaters, and pressure vessels. In the petrochemical and refinery sectors, you’ll find them in reactors, piping systems, and furnace components. Power plants use these fittings in steam pipelines and turbine assemblies, while the aerospace and automotive industries also rely on them for their robust performance.
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