ASTM A213 TP304S Stainless Steel Tubes (UNS S30400)
ASTM A213 TP304S Stainless Steel Tubes (UNS S30400) are seamless austenitic stainless steel tubes designed primarily for high-temperature and corrosion-resistant applications. TP304S is similar to TP304 but specifically optimized for superheater and heat-exchanger service, offering excellent formability, weldability, and heat resistance.
TP304S is widely used across industries for its reliability, durability, and resistance to oxidation in elevated-temperature conditions.
Key Features
- Excellent corrosion & oxidation resistance
- Good high-temperature strength
- Superior weldability & formability
- Durable structure for superheater & boiler applications
- High resistance to scaling up to 870°C
- Stable austenitic microstructure
Equivalent Grades
| Standard | Equivalent Grade |
|---|---|
| UNS | S30400 |
| EN / DIN | 1.4301 |
| JIS | SUS 304 |
| GB | 06Cr19Ni10 |
| BS | 304S15 / 304S31 |
| GOST | 08Х18Н10 |
Available Sizes
- OD: 6 mm to 101.6 mm
- Wall Thickness: 0.5 mm to 12.7 mm
- Length: 1–12 meters (custom lengths available)
ASTM A213 TP304S Chemical Composition
| Element | Content (%) |
|---|---|
| Carbon (C) | ≤ 0.08 |
| Manganese (Mn) | ≤ 2.00 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.030 |
| Silicon (Si) | ≤ 0.75 |
| Chromium (Cr) | 18.0 – 20.0 |
| Nickel (Ni) | 8.0 – 11.0 |
| Nitrogen (N) | ≤ 0.10 |
ASTM A213 TP304S Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength (MPa) | ≥ 515 |
| Yield Strength 0.2% (MPa) | ≥ 205 |
| Elongation (%) | ≥ 35 |
| Hardness (HBW) | ≤ 192 |
Physical Properties
| Property | Value |
|---|---|
| Density | 8.0 g/cm³ |
| Melting Point | 1400–1450°C |
| Thermal Conductivity | 16.2 W/m•K |
| Electrical Resistivity | 0.72 μΩ•m |
| Modulus of Elasticity | 193 GPa |
| Coefficient of Expansion | 17.2 μm/m°C |
Types of ASTM A213 TP304S Tubes
- Seamless Tubes
- Heat Exchanger Tubes
- Superheater Tubes
- Boiler Tubes
- U-Bend Tubes
- Cold Drawn Seamless Tubes
- Polished Stainless Steel Tubes (180–400 Grit)
Applications
- Heat Exchangers
- Superheater & Reheater Tubes
- High-Temperature Boilers
- Petrochemical Industry
- Chemical Processing Equipment
- Food & Beverage Processing
- Nuclear Power Plants
- Oil & Gas Refinery Components
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