ASTM A213 TP304 Alloy Austenitic Stainless Steel Tubes (UNS S30400)
ASTM A213 TP304 Seamless Tubes are premium-grade austenitic stainless steel tubes designed for high-temperature and corrosion-resistant applications such as heat exchangers, superheaters, boilers, and industrial processing systems. Known for its outstanding weldability, formability, oxidation resistance, and durability, ASTM A213 TP304 (UNS S30400) is one of the most widely used stainless steel grades across industries.
These tubes offer excellent resistance to chemicals, heat, and atmospheric corrosion—making them ideal for thermal processing, food processing, petrochemicals, and power generation.
Key Features
- Excellent corrosion & oxidation resistance
- Superior strength at elevated temperatures
- High ductility, weldability & formability
- Smooth inner surface ensures better fluid flow
- Ideal for heat exchanger & boiler applications
- Resistance to chloride stress corrosion cracking
- Hygienic & easy to clean — suitable for food & pharma
Equivalent Grades
| Standard |
Grade |
| UNS |
S30400 |
| WNR |
1.4301 |
| EN |
X5CrNi18-10 |
| JIS |
SUS 304 |
| BS |
304S15 / 304S31 |
| GOST |
08Ch18N10 |
Available Sizes
| Category |
Size Range |
| Outside Diameter |
6 mm – 120 mm |
| Wall Thickness |
0.5 mm – 12.7 mm |
| Length |
Up to 12 meters (custom lengths available) |
ASTM A213 TP304 Chemical Composition
| Element |
Percentage (%) |
| Carbon (C) |
≤ 0.08 |
| Manganese (Mn) |
≤ 2.00 |
| Phosphorus (P) |
≤ 0.045 |
| Sulfur (S) |
≤ 0.030 |
| Silicon (Si) |
≤ 1.00 |
| Chromium (Cr) |
18.0 – 20.0 |
| Nickel (Ni) |
8.0 – 11.0 |
| Nitrogen (N) |
≤ 0.10 |
| Iron (Fe) |
Balance |
ASTM A213 TP304 Mechanical Properties
| Property |
Value |
| Tensile Strength (min) |
515 MPa |
| Yield Strength (min) |
205 MPa |
| Elongation |
35% |
| Hardness (Max) |
90 HRB |
| Modulus of Elasticity |
193 GPa |
Physical Properties
| Property |
Value |
| Density |
8.0 g/cm³ |
| Melting Range |
1400–1450°C |
| Thermal Conductivity |
16.2 W/m·K |
| Coefficient of Expansion |
17.3 × 10⁻⁶ /°C |
| Electrical Resistivity |
0.72 μΩ·m |
Types of ASTM A213 TP304 Tubes
- Seamless Stainless Steel Tubes
- Heat Exchanger Tubes
- Superheater Tubes
- Boiler Tubes
- Condenser Tubes
- U-Bend Tubes
- Polished Tubes (180 / 240 / 320 / 400 Grit)
- Instrumentation Tubes
- Custom Fabricated Tubes
Applications
- Heat Exchangers
- Superheaters & Reheaters
- Boilers & Condensers
- Petrochemical Industry
- Oil & Gas Processing
- Food & Dairy Equipment
- Pharmaceutical Processing
- Power Generation
- Chemical Industry
- Water Treatment Plants
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