ASTM A213 TP309H Stainless Steel Tubes (UNS S30909)
ASTM A213 TP309H Stainless Steel Tubes (UNS S30909) are high-temperature austenitic stainless steel tubes designed for demanding environments involving elevated temperatures and corrosive atmospheres. The higher chromium and nickel content, along with controlled carbon levels, provide excellent oxidation resistance, creep strength, and thermal stability up to 1100°C.
These tubes are ideally suited for boilers, heat exchangers, furnaces, reheaters, superheaters, and petrochemical processing equipment.
Key Features
- High-temperature strength and durability
- Excellent oxidation & scaling resistance up to 1100°C
- Superior corrosion resistance in carburizing & reducing atmospheres
- High nickel & chromium content for thermal stability
- Good weldability and structural stability
- Ideal for continuous high-temperature service
Equivalent Grade
| Standard | Grade |
|---|---|
| UNS | S30909 |
| EN / DIN | 1.4833 / X12CrNi23-13 |
| JIS | SUS 309H |
| GB | 12Cr23Ni13 |
| BS | 309S / 309H |
| ISO | 309H |
Available Sizes
- Outside Diameter: 6 mm to 114 mm
- Wall Thickness: 0.5 mm to 12 mm
- Length: 1–12 meters (custom lengths on request)
- Special Shapes: U-bend, coil-form tubes
ASTM A213 TP309H Chemical Composition
| Element | Content (%) |
|---|---|
| Carbon (C) | 0.04 – 0.10 |
| Manganese (Mn) | ≤ 2.00 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.030 |
| Silicon (Si) | ≤ 0.75 |
| Chromium (Cr) | 22.0 – 24.0 |
| Nickel (Ni) | 12.0 – 15.0 |
| Nitrogen (N) | ≤ 0.10 |
| Iron (Fe) | Balance |
ASTM A213 TP309H Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | ≥ 620 MPa |
| Yield Strength (0.2%) | ≥ 310 MPa |
| Elongation (%) | ≥ 40 |
| Hardness (HBW) | ≤ 192 |
| Creep Strength | Excellent, suitable for high-temperature service |
Physical Properties
| Property | Value |
|---|---|
| Density | 7.9 g/cm³ |
| Melting Point | 1390–1440°C |
| Thermal Conductivity @100°C | 14.2 W/m•K |
| Electrical Resistivity | 0.78 μΩ•m |
| Modulus of Elasticity | 200 GPa |
| Coefficient of Expansion | 15.4 μm/m°C |
Types of ASTM A213 TP309H Tubes
- Seamless Tubes
- Boiler Tubes
- Superheater Tubes
- Reheater Tubes
- Heat Exchanger Tubes
- U-Bend Tubes
- Cold Drawn Tubes
- Polished Tubes (180 / 240 / 320 / 400 Grit)
Applications
- High-Temperature Boilers
- Furnace & Kiln Components
- Superheaters & Reheaters
- Heat Exchangers
- Petrochemical Processing Units
- Refining Heaters & Cracking Furnaces
- Power Generation Plants
- Thermal Oxidizers & Exhaust Systems
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