Product Overview – ASTM A312 TP309S Seamless Pipe
ASTM A312 TP309S Seamless Stainless Steel Pipes are chromium-nickel austenitic stainless
steel pipes containing 22–24% chromium and 12–15% nickel. The lower carbon content (max 0.08%) reduces carbide precipitation during welding and enhances resistance to intergranular corrosion.
Seamless construction ensures high pressure tolerance and structural integrity.
Standard, Grade & International Equivalents
ASTM A312 TP309S Seamless Pipe Specifications
| Manufacturing Type : | Seamless |
| Size Range : | 1/8″ NB to 24″ NB |
| Schedules : | 5S, 10S, 40S, 80S, 160, XS, XXS |
| Length : | 6m, 12m, Custom Length |
| End Type : | Plain End (PE), Beveled End (BE) |
| Testing : | Hydrostatic Test, PMI, NDT |
| Certification : | EN 10204 3.1 / 3.2 MTC |
| Dimensional compliance: | ASME B36.19M. |
All specifications are in accordance of ASTM A312 / ASME SA312 standards. Mechanical and chemical values are as per standard limits. Mill Test Certificates (MTC) available upon request.
Chemical Composition of ASTM A312 TP309S
(As per ASTM specification)
| Element | Max (%) |
|---|---|
| Carbon (C) | 0.08 |
| Manganese (Mn) | 2.00 |
| Phosphorus (P) | 0.045 |
| Sulfur (S) | 0.030 |
| Silicon (Si) | 1.00 |
| Chromium (Cr) | 22.0 - 24.0 |
| Nickel (Ni) | 12.0 - 15.0 |
| Iron (Fe) | Balance |
Mechanical Properties of ASTM A312 TP309S Seamless Pipe
| Property | Minimum Value |
|---|---|
| Tensile Strength | ≥ 515 MPa |
| Yield Strength | ≥ 205 MPa |
| Elongation | ≥ 35% |
Values apply in annealed condition as per ASTM standards.
Corrosion & Heat Resistance Characteristics– ASTM A312 TP309
TP309S seamless pipes provide:
This makes TP309S stainless steel pipes ideal for continuous and cyclic high-temperature applications.
Applications of ASTM A312 TP309S pipes
- ASTM A312 TP309S pipes are widely used in:
- 🔸Furnace components
- 🔸Heat treating equipment
- 🔸Kilns and thermal processing units
- 🔸Petrochemical refining units
- 🔸Boiler and pressure piping systems
- 🔸High temperature structural piping
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