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| Property | Parameter | Description |
|---|---|---|
| Product Name | Alloy Steel Boiler Tube | Seamless alloy steel tube designed for high-temperature and high-pressure boiler service |
| Material Grade | ASTM A213 T11 / T22 / T91 | Equivalent to EN 10216-2 13CrMo4-5, 10CrMo9-10, X10CrMoVNb9-1; JIS G3462 STBA 24/26; GB 5310 12Cr1MoV, 15CrMo |
| Standard Compliance | ASTM A213 / ASME SA213 | Also conforming to EN 10216-2, JIS G3462, GB 5310 upon request |
| Carbon (C) | 0.05 – 0.15% | Varies by grade; T22 typical max 0.15%, T91 range 0.08–0.12% |
| Chromium (Cr) | 1.00 – 9.50% | T11: 1.00–1.50%; T22: 1.90–2.60%; T91: 8.00–9.50% |
| Molybdenum (Mo) | 0.44 – 1.10% | T11: 0.44–0.65%; T22: 0.87–1.13%; T91: 0.85–1.05% |
| Manganese (Mn) / Silicon (Si) | Mn: 0.30 – 0.60% / Si: 0.25 – 0.50% | Controlled within ASTM A213 specification limits for each grade |
| Tensile Strength | 415 – 620 MPa | T11: ≥415 MPa; T22: ≥415 MPa; T91: ≥585 MPa per ASTM A213 |
| Yield Strength | 205 – 415 MPa | T11: ≥205 MPa; T22: ≥205 MPa; T91: ≥415 MPa per ASTM A213 |
| Elongation | ≥20% | Minimum elongation in 50 mm gauge length, varies slightly by grade and wall thickness |
| Outer Diameter (OD) | 6.0 – 219.1 mm (1/4'' – 8'') | Custom OD available upon request; tight tolerance per ASTM A213 |
| Wall Thickness (WT) | 1.0 – 30.0 mm | Scheduled or custom wall thickness; minimum wall tolerance per standard |
| Length | 5,000 – 18,000 mm | Random, fixed, or cut-to-length; typically supplied in random lengths |
| Surface Finish | Pickled / Oiled / Black Painted | Inner and outer surfaces cleaned; ID may be honed or polished on request |
| Application | Power plant boilers, superheaters, reheaters, heat exchangers | Suitable for high-temperature steam service up to 600 °C depending on grade |
| Certification | ISO 9001, PED 2014/68/EU, TÜV, Mill Test Certificate EN 10204 3.1 | Third-party inspection (SGS, BV, Lloyd's) available upon request |
| Packaging | Bundled with steel strips, plastic caps on ends | Wrapped in waterproof cloth or packed in wooden cases for export |
| MOQ | 1 Metric Ton | Smaller quantities negotiable for trial orders; stock items may ship immediately |
Precision Cut-to-Length T22 Tubes Saved Us Fabrication Time
Needed 7 tons of ASTM A213 T22 reheater tubes, 50.8mm OD x 6.35mm, cut to 4,250mm lengths with beveled ends for direct welding. Kuaima delivered exactly to spec—length tolerance was within ±0.5mm, tighter than the ±1mm they advertise. This eliminated our in-house cutting step entirely and sped up coil assembly by two days. All 3.1 certificates and ECT reports were bundled electronically before the cargo even arrived at Felixstowe. Genuinely impressed with the attention to detail on this order.
Needed 7 tons of ASTM A213 T22 reheater tubes, 50.8mm OD x 6.35mm, cut to 4,250mm lengths with beveled ends for direct welding. Kuaima delivered exactly to spec—length tolerance was within ±0.5mm, tighter than the ±1mm they advertise. This eliminated our in-house cutting step entirely and sped up coil assembly by two days. All 3.1 certificates and ECT reports were bundled electronically before the cargo even arrived at Felixstowe. Genuinely impressed with the attention to detail on this order.
