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TP304 stainless steel seamless pipe (ASTM A312/A213 TP304) is one of the most widely used austenitic stainless steel pipes in industrial applications. With its excellent corrosion resistance, outstanding workability, and stable performance in both high an
Contact USTP304 stainless steel seamless pipe (ASTM A312/A213 TP304) is one of the most widely used austenitic stainless steel pipes in industrial applications. With its excellent corrosion resistance, outstanding workability, and stable performance in both high and low temperature environments, it has become a standard material in industries such as petroleum, chemical processing, pharmaceuticals, food processing, and energy.
A seamless stainless steel tube(SMLS) is manufactured by drawing a solid billet over a piercing rod to form a hollow tube. Because the manufacturing process does not involve welding, seamless pipes are considered stronger and more reliable. Historically, seamless pipes have been regarded as better able to withstand pressure and are often easier to obtain than welded pipes.
TP304 is an ASTM standard austenitic stainless steel grade (UNS S30400), equivalent to EN 1.4301, GB 06Cr19Ni10, and JIS SUS304.
Seamless pipes are produced by hot rolling or cold drawing processes without weld seams, with the following main standards:
| American Standards | ASTM A312 / ASTM A213 (for boilers, superheaters, and fluid transportation) |
| Chinese Standards | GB/T 14976 (for fluid transportation) GB/T 14975 (for structural applications) GB 13296 (for boilers and heat exchangers) |
| Other Standards | JIS G3459 (Japan) DIN 17458 (Germany) |
1. Corrosion Resistance
TP304 seamless stainless steel pipes are made from high-quality 304 stainless steel and provide excellent resistance to corrosion, allowing them to withstand a wide range of chemical environments and harsh operating conditions.
2. High Strength
These pipes exhibit excellent tensile strength and maintain stable mechanical properties even under high temperature and high pressure conditions, meeting the strength requirements of various engineering applications.
3. High Temperature Resistance
TP304 seamless stainless steel pipes perform well in elevated temperature environments and can withstand temperatures up to 800°C, making them suitable for high-temperature processing equipment and pipelines.
4. Good Workability
TP304 pipes can be easily processed into different shapes and customized sizes, providing flexibility for various engineering projects and equipment manufacturing.
5. High Cost Performance
As one of the most commonly used 300-series stainless steels, TP304 offers excellent cost efficiency and is often chosen as an upgrade from carbon steel for corrosion resistance.
6. Hygienic Performance
The smooth inner wall reduces scaling and contamination, meeting food-grade and potable water hygiene standards, and prevents secondary pollution of the transported medium.
| Parameter | Specification |
| Outer Diameter | 6-219mm |
| Wall Thickness | 0.5-18 mm |
| Dimensional Tolerance | OD ±0.1 mm, ID ±0.1 mm, or as required |
| Type | Seamless |
| Processing Method | Cold Rolled, Cold Drawn |
| Delivery Condition | Cold finished, Annealed, Normalized |
| Surface Finish | Pickled, Polished, BA, Mirror |
| Trade Terms | EXW, FOB, CIF, CFR |
| Production Standards | ASTM A312, ASTM A213, ASTM A269, EN 10216-5, GB/T 14976 |
Chemical Composition of TP304 Seamless Pipe
| Element | China GB/T Grade | USA ASTM / AISI | EU EN Standard |
| Grade | 06Cr19Ni10 (0Cr18Ni9) | TP304 | 1.4301 |
| Cr | 18.0-20.0 | 18.0-20.0 | 18.0-20.0 |
| Ni | 8.0-11.0 | 8.0-11.0 | 8.0-11.0 |
| C | ≤0.08 | ≤0.08 | ≤0.07 |
| Si | ≤1.00 | ≤1.00 | ≤1.00 |
| Mn | ≤2.00 | ≤2.00 | ≤2.00 |
| P | ≤0.045 | ≤0.045 | ≤0.045 |
| S | ≤0.030 | ≤0.030 | ≤0.030 |
Mechanical Properties
| Tensile Strength (σb) | ≥520 MPa |
| Yield Strength (σ0.2) | ≥205 MPa |
| Elongation (δ5) | ≥40% |
| Hardness | HB ≤187 / HRB ≤90 / HV ≤200 |
Physical Properties of 304 Stainless Steel (Annealed Condition)
| Grade | Density (kg/m³) | Elastic Modulus (GPa) | Thermal Expansion Coefficient (μm/m/°C) | Thermal Expansion Coefficient (μm/m/°C) | Specific Heat 0-100°C (J/kg·K) | Electrical Resistivity (nΩ·m) |
| 0-100°C / 0-315°C / 0-538°C | at 100°C / at 500°C | |||||
| 304/L/H | 8000 | 193 | 17.2 / 17.8 / 18.4 | 16.2 / 21.5 | 500 | 720 |
| 304 stainless steel pipe | 304 cold drawn pipe | ASTM A312 TP304 seamless stainless steel pipe | ASTM A213 TP304 seamless stainless steel pipe |
| 304 stainless steel seamless pipe | TP304 seamless pipe | TP304 seamless stainless steel pipe | 304 stainless steel cold drawn pipe |
Petrochemical Industry
Pipelines for transporting moderately corrosive media, flange pipe fittings, and instrument tubing.
Food and Pharmaceutical Industry
Pipelines for milk, beer, and beverage transportation, as well as pharmaceutical equipment and sanitary pipelines.
Power and Boilers
Heat exchangers, superheater tubes (within suitable temperature limits), and condensers.
Mechanical Structures
Hydraulic systems, rollers, and structural components in shipbuilding and paper-making machinery.
Water Treatment
Drinking water transportation and seawater desalination pretreatment systems.
Architectural Decoration
Handrails, landscape structures, and curtain wall supports.
When purchasing seamless stainless steel pipes, TP304 (standard carbon) and TP304L (low carbon) are the two most commonly used grades.
TP304 corresponds to 304 stainless steel, while TP304L is its low-carbon version (304L stainless steel).
| Comparison Item | TP304 Stainless Steel Pipe | TP304L Stainless Steel Pipe |
| Carbon Content | ≤0.08% | ≤0.03% |
| Welding Performance | Requires attention during welding; thick-wall or long welding may cause sensitization | More stable welding; usually no post-weld annealing required |
| Intergranular Corrosion | Possible after welding | Low carbon reduces risk of intergranular corrosion |
| Typical Applications | General industrial pipelines, food equipment | Chemical equipment, welded structural pipelines |
| Mechanical Properties | ≥515 MPa, slightly higher strength | ≥485 MPa, slightly lower strength but better ductility |
| Price | Standard and cost-effective | Slightly higher, preferred for demanding environments |
Summary
TP304: Balanced performance, suitable for general industrial environments.
TP304L: Low carbon design with better welding performance, more suitable for chemical and highly corrosive environments.
We are a professional manufacturer of seamless stainless steel pipes. We supply ASTM A213 TP304 stainless steel seamless pipes conforming to ASME SA / ASTM A269, A312, and A213 standards, as well as other grades such as 202, 304, 304L, 304H, 304LN, 309s, 310s, 316, 316L, 316H, 316Ti, 316LN, 317L, 321, 321H, 347, 347H, and 904L. We also provide 304 pipes in different sizes, thicknesses, and standards according to customer customization requirements. Factory direct sales, exporting to over forty countries and regions worldwide, offering competitive prices.
01
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