Reliable Pipes & Tubes is a leading manufacturer, supplier, stockist, and exporter of premium quality SS 321H Seamless Pipe manufactured according to international quality standards. Our SS 321H Seamless Pipe products are widely used in industries requiring excellent high-temperature strength, superior corrosion resistance, and long service life.
SS 321H Seamless Pipe is a high-carbon version of SS 321 stainless steel stabilized with titanium. The addition of titanium prevents carbide precipitation during welding and elevated temperature service, while the higher carbon content improves creep strength and high-temperature performance.
Reliable Pipes & Tubes supplies SS 321H Seamless Pipe in various sizes, schedules, wall thicknesses, and custom lengths to meet diverse industrial requirements. Every SS 321H Seamless Pipe undergoes strict quality control and testing procedures to ensure reliable performance and durability.
Email us Whatsapp us Call usSS 321H Seamless Pipe is manufactured without welded joints, offering superior pressure handling capability, enhanced structural integrity, and leak-proof performance. The titanium stabilization provides excellent resistance to sensitization and intergranular corrosion at elevated temperatures.
| Specification | Details |
|---|---|
| Standard | ASTM A312 / ASME SA312 |
| Grade | SS 321H / UNS S32109 |
| Pipe Type | Seamless |
| Size Range | 1/8" NB to 24" NB |
| Wall Thickness | 0.6 mm to 12.7 mm |
| Schedule | SCH 5S, SCH 10S, SCH 40S, SCH 80S, SCH 160, XXS |
| Length | Single Random, Double Random & Cut Length |
| End Type | Plain End, Beveled End, Threaded |
| Surface Finish | Annealed, Pickled, Bright Annealed, Polished |
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.04 – 0.10 |
| Manganese (Mn) | 2.00 Max |
| Silicon (Si) | 1.00 Max |
| Phosphorus (P) | 0.045 Max |
| Sulfur (S) | 0.030 Max |
| Chromium (Cr) | 18.0 – 20.0 |
| Nickel (Ni) | 9.0 – 12.0 |
| Nitrogen (N) | 0.10 Max |
| Titanium (Ti) | 5(C+N) – 0.70 Max |
| Property | Value |
|---|---|
| Density | 8.0 g/cm³ |
| Melting Point | 1457°C |
| Tensile Strength | 515 MPa Min |
| Yield Strength | 205 MPa Min |
| Elongation | 40% Min |
| Hardness | 95 HRB Max |
| Modulus of Elasticity | 193 GPa |