ASTM A209 T1 Boiler Tubes
ASTM A209 T1 Boiler Tubes (UNS K11522) are seamless carbon-molybdenum (C-Mo) alloy-steel tubes used in boilers, superheaters, and heat exchangers. These tubes offer excellent strength, thermal stability, and resistance to oxidation under elevated temperatures. With superior mechanical properties and dimensional accuracy, ASTM A209 T1 tubes are widely used in power generation, petrochemical, and refinery industries.
Key Features
- Seamless carbon-molybdenum steel construction
- Excellent high-temperature strength
- Superior thermal stability
- Good creep resistance
- High weldability and formability
- Suitable for boilers, superheaters, and heat exchangers
Equivalent Grades
| Standard | Equivalent Grade |
|---|---|
| UNS | K11522 |
| ASTM | A209 T1 |
| ASME | SA209 T1 |
| European (EN) | 15Mo3 (Nearest Equivalent) |
Available Sizes
- Outer Diameter: 12.7 mm – 127 mm
- Wall Thickness: 1.5 mm – 25 mm
- Lengths: 4m, 6m, 12m & Customized
T1 Chemical Composition
| Element | T1 Composition (%) |
|---|---|
| Carbon (C) | 0.10 – 0.20 |
| Manganese (Mn) | 0.30 – 0.80 |
| Phosphorus (P) | 0.025 max |
| Sulfur (S) | 0.025 max |
| Silicon (Si) | 0.10 – 0.50 |
| Molybdenum (Mo) | 0.44 – 0.65 |
Gr T1 Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | 415 MPa (min) |
| Yield Strength | 255 MPa (min) |
| Elongation | 30% (min) |
| Hardness | 85 HRB (max) |
Gr T1 Physical Properties
| Property | Value |
|---|---|
| Density | 7.85 g/cm³ |
| Melting Point | 1425 – 1540°C |
| Thermal Conductivity | 26 W/m·K |
| Modulus of Elasticity | 207 GPa |
| Electrical Resistivity | 0.15 μΩ·m |
Types of ASTM A209 T1 Tubes
- Seamless Boiler Tubes
- Superheater Tubes
- Heat Exchanger Tubes
- High-Pressure Boiler Tubes
- Medium-Thickness & Heavy-Thick Wall Tubes
- Annealed / Normalized Tubes
Applications
- High-pressure boilers
- Superheaters
- Heat exchangers
- Petrochemical heaters
- Power plants
- Refineries
- Industrial steam piping
- Thermal plants
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