ASTM A778 TP304L Stainless Steel Pipe
Ganyeah Group, a leading stainless steel pipe manufacturer with over two decades of industry expertise, proudly offers ASTM A778 TP304L stainless steel pipes. This specification covers welded, unannealed austenitic stainless steel tubes designed for moderate temperatures and corrosive environments where post-weld heat treatment is not required.
Product Description
Standard: ASTM A778
Grade: TP304L
Type: Welded, Unannealed (Straight Seam or Spiral Weld)
Size Range:
Outside Diameter: 3” to 48” [75 mm to 1200 mm]
Wall Thickness: 0.062” to 0.500” [1.57 mm to 12.70 mm]
(Pipes outside this range can be supplied upon agreement, provided they meet all other specification requirements.)
Surface Finish: Pickled and passivated or as agreed
Welding Method: TIG or Laser welding, no filler metal used
Heat Treatment: Not required (except by agreement)
Chemical Composition of TP304L (Max Limits Unless Range Given)
| Element | Content (%) |
| Carbon (C) | 0.030 max |
| Manganese (Mn) | 2.00 max |
| Phosphorus (P) | 0.045 max |
| Sulfur (S) | 0.030 max |
| Silicon (Si) | 1.00 max |
| Chromium (Cr) | 18.0 – 20.0 |
| Nickel (Ni) | 8.0 – 13.0 |
| Nitrogen (N) | 0.10 max |
(Note: Titanium and Columbium + Tantalum are not typically specified for TP304L)
Mechanical Properties
| Property | Requirement |
| Tensile Strength (min) | 70 ksi [485 MPa] |
Elongation requirements depend on wall thickness and specimen gauge length, as per ASTM A778.
Applications
ASTM A778 TP304L pipes are ideal for non-critical pressure applications where corrosion resistance is essential but solution annealing is not required, including:
HVAC duct systems and exhaust piping
Food and beverage piping
Low- and moderate-temperature chemical process lines
Structural and decorative stainless steel pipework
Low-pressure fluid and gas transport
Standard Compliance Notes
ASTM A778 is not intended for high-pressure or highly corrosive service unless supplemented with additional testing. If your application requires:
Post-weld heat treatment, or
Radiographic (X-ray) examination,
please consider alternatives such as ASTM A312, A358, or A409. These standards include more stringent mechanical and corrosion performance requirements.
Why Choose Ganyeah Group?
As a trusted supplier of stainless steel piping systems, Ganyeah Group ensures:
Full material traceability
Optional hydrostatic or nondestructive testing (as per supplementary requirements)
Customized pipe lengths, surface finishes, and fabrication services
Export-ready documentation including MTCs and quality certifications
Ordering Information
When ordering ASTM A778 TP304L pipes, please specify:
Nominal size (NPS or OD and wall thickness)
Length requirements
End type (plain, beveled, or threaded)
Surface finish (pickled/passivated or polished)
Any supplementary testing (if required)
Contact Ganyeah Group today for high-quality ASTM A778 TP304L stainless steel pipes that meet your project’s performance and budget needs.