Home > Stainless Steel > Stainless Steel 321 and 321H Welded Pipes
Blundell Pipes and Tubes, a reputable manufacturer and supplier located in Hamilton, New Zealand, specializes in high-quality Stainless Steel 321 and 321H Welded Pipes, perfect for high-temperature and corrosive environments. These pipes are crafted using cutting-edge welding technology, ensuring consistent wall thickness, precise dimensions, and a smooth finish. Renowned for their outstanding resistance to oxidation and intergranular corrosion, the Stainless Steel 321 and 321H Welded Pipes from Blundell Pipes and Tubes are a go-to choice for critical applications where thermal stability, durability, and long-lasting reliability are a must.
These welded pipes are made from austenitic stainless steel alloys that are stabilized with titanium, which helps prevent carbide precipitation during welding and high-temperature use. The 321H grade features a higher carbon content, enhancing its strength at elevated temperatures. With a chemical makeup that includes chromium and nickel, these pipes boast excellent corrosion resistance, oxidation protection, and mechanical strength. On the mechanical side, they deliver good tensile and yield strength, impressive ductility, strong creep resistance at high temperatures, and dependable impact toughness, making them ideal for continuous high-heat operations.
Specifications : ASTM A312 / ASME SA312
Outside Diameter : 6.00 mm OD up to 914.4 mm OD, Sizes up to 24″ NB available Ex-stock, OD Size available Ex-stock
Thickness : 0.3mm – 50 mm, SCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXS, SCH XS
Size : 1/2″ NB – 24″ NB
Type : Welded
Form: Round Pipes, Square Pipes, Rectangular Pipes.
Length : Single Random, Double Random & Required Length
End : Plain End, Beveled End, Treaded
| STANDARD | WERKSTOFF NR. | UNS | JIS | EN |
| SS 321 | 1.4541 | S32100 | SUS 321 | X6CrNiTi18-10 |
| SS 321H | 1.4878 | S32109 | SUS 321H | X12CrNiTi18-9 |
| 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 % |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Choosing Stainless Steel 321 and 321H Welded Pipes guarantees excellent corrosion resistance, high strength, and durability. Designed for diverse industrial applications, it delivers reliable performance in tough environments while maintaining competitive pricing for cost-effective solutions.
Blundell Pipes and Tubes, a leading manufacturer and supplier of Stainless Steel 321 and 321H Welded Pipes in Hamilton, New Zealand, offers a comprehensive range of high-quality pipes and tubing suitable for various industrial applications. Our extensive inventory and commitment to exceptional service make us a trusted choice for regional products.
| NB Sizes | Sch 5 | Sch 10 | Sch 40 | Sch 80 | Sch 160 |
| 1/8″ | ✓ | ✓ | ✓ | ✓ | |
| 1/4″ | ✓ | ✓ | ✓ | ✓ | |
| 3/8″ | ✓ | ✓ | ✓ | ✓ | |
| 1/2″ | ✓ | ✓ | ✓ | ✓ | ✓ |
| 3/4″ | ✓ | ✓ | ✓ | ✓ | ✓ |
| 1″ | ✓ | ✓ | ✓ | ✓ | ✓ |
| 1 1/4″ | ✓ | ✓ | ✓ | ✓ | ✓ |
| 1 1/2″ | ✓ | ✓ | ✓ | ✓ | ✓ |
| 2″ | ✓ | ✓ | ✓ | ✓ | ✓ |
| 2 1/2″ | ✓ | ✓ | ✓ | ✓ | ✓ |
| 3″ | ✓ | ✓ | ✓ | ✓ | ✓ |
| 4″ | ✓ | ✓ | ✓ | ✓ | ✓ |
| 5″ | ✓ | ✓ | ✓ | ✓ | |
| 6″ | ✓ | ✓ | ✓ | ✓ |
| Grade | Density (kg/m3) | Elastic Modulus (GPA) | Mean Co-eff of Thermal Expansion (µm/m/°C) | Thermal Conductivity (W/m.K) | Specific Heat 0-100°C (J/kg.K) | Elec Resistivity (nΩ.m) | |||
| 0-100°C | 0-315°C | 0-538°C | At 100°C | At 500°C | |||||
| 321 and 321H | 8027 | 193 | 16.6 | 17.2 | 18.6 | 16.1 | 22.2 | 500 | 720 |
We offer custom sizes for Stainless Steel 321 and 321H Welded Pipes to meet your specific needs. Our dedicated team at Blundell Pipes and Tubes provides tailored solutions for all your piping and tubing requirements. For more information, contact us at sales@blundellpipes.co.nz.
Stainless Steel 321 and 321H Welded Pipes find extensive use in chemical and petrochemical plants, oil and gas refineries, and power generation facilities where high-temperature performance and corrosion resistance are crucial. They’re commonly utilized in heat exchangers, condensers, boilers, furnace components, and exhaust systems. Additionally, these pipes are well-suited for marine, offshore, and thermal processing applications. Their long service life, low maintenance needs, and excellent stability at high temperatures make them perfect for demanding industrial piping systems.
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