ASTM A213 T11 Seamless Alloy Tubes
Material:T5,T9,T11,T22,T23,T91,T92
OD Size:1/2" - 48"
Wall Thickness: 2 - 30mm
Length: 6M Or As the Client requests
Type: Seamless
Delivery Time：15-35 Days
Payment Terms: T/T, L/C
Packaging Details： According to client requirements/Bundle with plastic Cap
ASTM A213 T11 Seamless Steel Tube for High-Pressure Boilers
ASTM A213 T11 is a premier seamless ferritic alloy-steel tube designed specifically for high-pressure boilers, superheaters, and heat exchangers. As a low-alloy "Chrome-Moly" steel, it offers exceptional heat resistance and mechanical strength, making it the industry standard for power generation and petrochemical processing.
ASTM A213 Grade T11 is manufactured using the seamless process, ensuring a uniform structure capable of withstanding extreme internal pressures without the risk of weld-seam failure. ASTM A213 T11 Seamless Alloy Tubes are either hot-finished or cold-drawn and undergo specific heat treatments-typically full or isothermal annealing or normalized and tempered achieve the required grain structure for high-temperature service.
Technical Specifications
| Parameter | Specification |
|---|---|
| Standard | ASTM A213/A213M |
| Grade | T11 (1.25Cr-0.5Mo-Si) |
| Manufacturing Process | Hot Extruded, Cold Drawn & Annealed |
| Outside Diameter | 12.7 mm to 127 mm (0.5" to 5.0") |
| Wall Thickness | 1.65 mm to 12.7 mm (0.065" to 0.5") |
| Length | Up to 18 meters (random or cut lengths) |
| Surface Finish | Bare, Pickled & Oiled, or Black Finish |
| End Finish | Plain, Beveled, or Threaded as required |
Dimensional Tolerances
Outside Diameter Tolerance: ±0.10 mm for OD < 25.4 mm; ±0.15 mm for OD ≥ 25.4 mm
Wall Thickness Tolerance: ±10% of nominal thickness
Straightness Tolerance: Maximum 1.5 mm per meter length
Length Tolerance: +10 mm / -0 mm for random lengths; ±3 mm for cut lengths
Chemical Composition
| Element | Minimum | Maximum |
|---|---|---|
| Carbon (C) | 0.05 | 0.15 |
| Manganese (Mn) | 0.30 | 0.60 |
| Phosphorus (P) | - | 0.025 |
| Sulfur (S) | - | 0.025 |
| Silicon (Si) | 0.50 | 1.00 |
| Chromium (Cr) | 1.00 | 1.50 |
| Molybdenum (Mo) | 0.44 | 0.65 |
| Residual Elements | - | - |
Note: The controlled low carbon content minimizes carbide precipitation and ensures good weldability. The balanced chromium-molybdenum-silicon composition provides excellent oxidation resistance and high-temperature strength.
Mechanical Properties
| Property | Requirement | Typical Value |
|---|---|---|
| Tensile Strength | ≥415 MPa | 440-550 MPa |
| Yield Strength (0.2% offset) | ≥205 MPa | 230-310 MPa |
| Elongation in 2 inches | ≥30% | 35-45% |
| Hardness (Brinell) | ≤163 HB | 125-150 HB |
Elevated Temperature Properties
ASTM A213 T11 Seamless Alloy Tubes maintains significant strength retention at elevated temperatures:
510°C (950°F): Minimum Creep Rupture Strength: 100 MPa
540°C (1000°F): Minimum Creep Rupture Strength: 70 MPa
Maximum Recommended Service Temperature: 650°C (1200°F)
Heat Treatment
All T11 tubes undergo full annealing treatment at temperatures between 730°C to 760°C (1346°F to 1400°F), followed by controlled cooling to ensure optimal microstructure with tempered bainite/martensite structure, providing the best combination of strength, ductility, and toughness.
Applications
Due to its high thermal stability, ASTM A213 T11 Seamless Alloy Tubes are essential for various high-temperature energy sectors.
Power Plants: High-pressure boiler tubes and superheater coils.
Petrochemical Industry: Heat exchanger tubes and condenser units.
Energy Recovery: Economizers and waste heat recovery systems.
Refineries: High-temperature piping for crude oil processing.
Quality Control System
Raw Material Verification: Spectroscopic analysis of every heat of steel
Process Control: Statistical process control at every manufacturing stage
Final Inspection: 100% dimensional, visual, and non-destructive examination
Traceability: Complete heat-to-heat traceability with unique identification marking
Customization Capabilities
Wide range of sizes and specifications tailored to project requirements
Special surface treatments and protective coatings are available
Custom cutting, beveling, and threading services
Just-in-time delivery scheduling to match project timelines
Product Testing & Quality Assurance
Non-Destructive Testing (NDT)
Every length of the T11 tube undergoes comprehensive NDT:
- Eddy Current Testing: For the detection of surface and near-surface defects
- Ultrasonic Testing: For internal flaw detection and wall thickness verification
- Hydrostatic Testing: Pressure testing to 1.5 times design pressure or as specified
- Dimensional Inspection: Laser micrometers and ultrasonic thickness gauges for precision measurement
Destructive Testing
Batch testing performed according to ASTM A450 requirements:
- Tensile Testing: On samples from both ends of finished tubes
- Flattening Test: To evaluate ductility and soundness
- Flaring Test: To assess tube expandability
- Hardness Testing: At multiple locations along the tube length
Documentation & Certification
We provide comprehensive documentation with every shipment:
- Mill Test Certificate 3.1: Certified to EN 10204 standard with full chemical and mechanical test results
- Material Traceability: Complete records from raw material to finished product
- Third-Party Inspection: Available from recognized agencies (TÜV, SGS, Bureau Veritas)
- Origin Certification: Country of origin and customs documentation
Contact us today for quotations, technical data sheets, or to discuss your ASTM A213 T11 Seamless Alloy Tubes requirements.
Need a technical quote or a material sample? Contact Our Engineering Team Today for a prompt and professional response to your ASTM A213 T11 requirements.
Email:baohui@bhsteelpipe.com
Hot Tags: astm a213 t11 seamless alloy tubes, China astm a213 t11 seamless alloy tubes manufacturers, suppliers, factory, seamless carbon steel pipe
Previous
No InformationYou Might Also Like
Send Inquiry