ASTM A312 Grade TP321 (UNS S32100) stainless steel pipe is a titanium-stabilized austenitic stainless steel pipe designed for high-temperature service and corrosion resistance applications. It offers excellent resistance to intergranular corrosion and improved performance in environments where exposure to elevated temperatures is continuous. Available in seamless (SMLS), straight-seam welded, or heavily cold worked welded forms.
Key Features:
1) Excellent high-temperature resistance, suitable for long-term service at 800–1500°F (427–816°C)
2) Titanium stabilization prevents carbide precipitation
3) Strong resistance to intergranular corrosion, performs well in mildly acidic, organic, and high-temperature oxidizing environments
4) excellent formability & weldability
ASTM A312 Gr. TP321 Chemical Composition & Mechanical Property:
Chemical Composition |
Chemical Composition, % | TP304L | TP310S | TP316L | TP321 |
C, max | 0.035 | 0.08 | 0.035 | 0.08 |
Mn, max | 2.00 | 2.00 | 2.00 | 2.00 |
P, max | 0.045 | 0.045 | 0.045 | 0.045 |
S, max | 0.030 | 0.030 | 0.030 | 0.030 |
Si, max | 1.00 | 1.00 | 1.00 | 1.00 |
Cr | 18.0-20.0 | 24.0-26.0 | 16.0-18.0 | 17.0-19.0 |
Ni | 8.0-13.0 | 19.0-22.0 | 10.0-14.0 | 9.0-12.0 |
Mo | / | 0.75 max | 2.00-3.00 | / |
N | / | / | / | 0.10 |
Tensile Requirements | TP304L | TP310S | TP316L | TP321 |
Yield Strength (min)
MPa (psi) | 170 (24,700) | 205 (29,700) | 170 (24,700) | 205 (29,700) |
Tensile Strength (min)
MPa (psi) | 485 (70,300) | 515 (74,700) | 485 (70,300) | 515 (74,700) |
General information:
Standard: ASTM A312
Grade: TP321
Size: OD: 6–1219mm; WT: Schedule 10, 40, STD, XS, to 160; L: SRL / DRL / Cut to length
Ends:
1) Beveled ends
2) Plain ends
Available Finishing: annealed & pickled; bright annealed; polished
Package: Hexagonal bundled with steel strips for small or medium sizes, loose packing for large diameter pipes, plastic caps on both ends, waterproof material wrapped, wooden frames for safe transport or special requirements
Shipment: Land transportation by truck or train, sea transportation by container shipment or bulk vessel.
Hebei K-Steel Pipe Industry Our advantage:
Flexible Project Customization
We provide tailored manufacturing solutions to meet diverse project requirements, including customized outer diameter, wall thickness, and length specifications. In addition, we offer precision end preparation and a full range of anti-corrosion coating options to ensure optimal performance in various operating environments. This flexibility enables us to deliver line pipe solutions that align seamlessly with your technical and application needs.
Fast & Reliable Lead Time
With strong mill partnerships and readily available inventory resources, we are able to shorten production cycles and respond quickly to urgent project demands. Our integrated supply network ensures stable material availability, efficient scheduling, and on-time delivery — helping clients keep their projects on track without delay.
Advanced Technical & Quality Assurance
Equipped with our own metallurgical laboratories and supported by trusted third-party inspection agencies, we ensure every line pipe meets international standards and project specifications. Comprehensive testing and verification guarantee consistent mechanical properties, chemical composition, and coating integrity, providing clients with reliable, high-quality pipeline solutions.
Rapid Delivery & Complete Logistics
Leveraging fast supply capabilities and a well-established logistics network, we ensure timely delivery of line pipes to any project location. Our streamlined transportation and warehousing system minimize lead time, helping clients maintain smooth operations and meet critical project schedules.
