The ASTM A358 TP304L (UNS S30403) is an Electric Fusion Welded (EFW) austenitic stainless steel pipe designed for high-temperature and general corrosive service. The "L" grade indicates a low carbon content (≤0.03%), providing superior resistance to intergranular corrosion after welding without requiring post-weld heat treatment. This standard covers Class 1 through Class 5 pipe based on radiographic examination requirements, offering flexibility for various application criticality levels.
Key Features:
1) Excellent corrosion resistance in a variety of environments
2) Low carbon content reduces risk of intergranular corrosion after welding
3) Good weldability and formability
4) Large-diameter EFW format suitable for industrial piping projects
5) Durable, cost-effective, and reliable for general and chemical piping
ASTM A358 Gr. TP304L Chemical Composition & Mechanical Property:
Chemical Composition |
Chemical Composition, % | TP304L | TP316L |
C, max | 0.030 | 0.030 |
Mn, max | 2.00 | 2.00 |
P, max | 0.045 | 0.045 |
S, max | 0.030 | 0.030 |
Si, max | 0.75 | 0.75 |
Cr | 18.0-20.0 | 16.0-18.0 |
Ni | 8.0-12.0 | 10.0-14.0 |
Mo | / | 2.00-3.00 |
N, max | 0.10 | 0.10 |
Tensile Requirements | TP304L | TP316L |
Yield Strength (min)
MPa (psi) | 170 (24,700) | 170 (24,700) |
Tensile Strength (min)
MPa (psi) | 458 (70,300) | 458 (70,300) |
General information:
Standard: ASTM A358
Grade: TP304L
Size: OD: 50-1219mm; WT: Schedule 10, 40, STD, XS, to 160; L: SRL / DRL / Cut to length
Ends:
1) Beveled ends
2) Plain ends
3) Threaded ends
Available Finishing: annealed & pickled (AP); oiled
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 cases or crates for small sizes 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.
