A213 Seamless Carbon Steel Pipe Product Overview
ASTM A213 Seamless Pipes are quenched & tempered chromium-molybdenum alloy tubes engineered for ultra-high-pressure boilers (650°C/1,202°F), superheaters, and refinery hydrocrackers. Available in creep-resistant grades like T91 (9Cr-1Mo-V) and T92 (9%Cr-0.5%Mo-W), these pipes achieve 620+ MPa tensile strength with ISO 9331 compliance for ±5% wall thickness tolerances. H-graded variants (e.g., T22H) offer 15% higher stress rupture strength vs. standard T22 at 593°C.
Key Technical Specifications
1. Dimensional & Metallurgical Properties
- Size Range:
- OD: 6.35 mm (¼”) – 127 mm (5″) | Wall Thickness: 1.25–40 mm
- Length: 3–12 m (standard), up to 18 m (custom)
- Heat Treatments:
- T91/T92: Normalized (1,040°C) + Tempered (760°C)
- T22: Full Annealed (900°C) for 25 HRC max hardness
- Tolerances:
- OD: ±0.75% (ASTM A213 Section 12)
- Decarburization: ≤0.075 mm depth (T91/T92)
2. Chemical & Mechanical Performance
Chemical Composition:
| Grade | Cr | Mo | V | C | Key Trait |
|---|---|---|---|---|---|
| T22 | 1.90–2.60% | 0.87–1.13% | – | ≤0.15% | Sulfidation resistance |
| T91 | 8.0–9.5% | 0.85–1.05% | 0.18–0.25% | 0.07–0.14% | 100,000h creep life @ 600°C |
| T92 | 8.5–9.5% | 0.30–0.60% | 0.15–0.25% | 0.07–0.13% | 35% higher stress rupture vs. T91 |
Mechanical Properties:
| Grade | Tensile (MPa) | Yield (MPa) | Elongation (%) | Hardness (HBW) | Creep Temp Limit |
|---|---|---|---|---|---|
| T22 | ≥415 | ≥205 | ≥30 | ≤163 | 550°C |
| T91 | ≥585 | ≥415 | ≥20 | ≤250 | 625°C |
| T92 | ≥620 | ≥440 | ≥20 | ≤250 | 650°C |
Stress Rupture Data:
| Grade | Temperature | Stress (MPa) | Rupture Time |
|---|---|---|---|
| T91 | 600°C | 100 | 100,000h |
| T92 | 650°C | 85 | 30,000h |
Applications by Industry
| Industry | Use Case | Grade | Key Benefit |
|---|---|---|---|
| Power Generation | Ultra-supercritical (USC) boilers | T92 | 650°C steam service |
| Petrochemical | Hydrocracker reactor effluent lines | T91 | H2S resistance (NACE MR0175) |
| Nuclear | Steam generator U-tubes | TP304H | 195 MPa yield @ 400°C |
| Waste-to-Energy | Municipal incinerator superheaters | T22 | 0.15% carbon for weldability |
Global Standard Equivalents
| ASTM A213 | EN 10216-2 | JIS G3462 | ISO 9331 |
|---|---|---|---|
| T22 | 13CrMo4-5 | STBA 24 | 15CrMo5 |
| T91 | X10CrMoVNb9-1 | STPA 26 | X10CrMoVNb9 |
| T92 | – | – | X11CrMoWVNb9 |
Certifications & Compliance
- Processing: ASME Section II (Material) + Section IX (Welding)
- Testing: Ultrasonic (ASTM A213 15.2), Flattening (ASTM A370)
- Certifications: PED 2014/68/EU Category IV, NACE MR0103
Packing And Delivery
