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| Nguồn gốc: | Trung Quốc |
| Hàng hiệu: | YUHONG |
| Chứng nhận: | ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008 |
| Số mô hình: | ASTM A213 T9 |
| Số lượng đặt hàng tối thiểu: | 100 kg |
|---|---|
| Giá bán: | Có thể đàm phán |
| chi tiết đóng gói: | Case-Wooden Case / Iron Case / Gói có nắp nhựa |
| Thời gian giao hàng: | 5-80 ngày |
| Điều khoản thanh toán: | T/T, L/C ở tầm nhìn |
| Khả năng cung cấp: | 1500 tấn / Tháng |
| Tiêu chuẩn: | ASTM A213/ASME SA213 | Vật liệu: | T9 |
|---|---|---|---|
| Kiểu: | Liền mạch | Kỹ thuật: | Nóng cuộn |
| Bề mặt: | Tranh đen | Ứng dụng: | Nồi hơi/Thiết bị trao đổi nhiệt/Dầu khí |
| Làm nổi bật: | ASTM A213 T9 alloy steel tube,seamless heat exchange tube,alloy steel seamless tube |
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ASTM A213 Grade T9 Alloy Steel Seamless Tube Heat Exchange Tube
ASTM A213 Grade T9 is a classic medium-chromium alloy steel with a long history of use in high-temperature and high-pressure industries. It strikes an excellent balance between high-temperature strength, oxidation resistance, and cost, making it a key material for the manufacture of power plant boiler superheater tubes and petrochemical furnace tubes. Although replaced in some applications by newer steel grades like T91, which offer superior performance, T9 remains widely used in many existing equipment and design conditions.
Comparison with Other Common Grades
Comparison with T5 (5Cr-0.5Mo): T9's higher chromium and molybdenum content improves its high-temperature strength and oxidation resistance compared to T5.
Comparison with T11 (1.25Cr-0.5Mo) / T22 (2.25Cr-1.0Mo): T9's chromium content is significantly higher than that of T11 and T22, resulting in improved oxidation and corrosion resistance, but also a higher cost.
Compared to T91 (9Cr-1Mo-V-Nb): T91 is a modern, improved version of T9 that incorporates vanadium (V) and niobium (Nb). Through precipitation strengthening, its high-temperature strength is far superior to that of traditional T9. It is currently one of the preferred materials for supercritical and ultra-supercritical power plants. T9 can be considered the predecessor of T91.
| C, % | Mn, % | P, % | S, % | Si, % | Cr, % | Mo, % |
| 0.15 max | 0.30-0.60 | 0.025 max | 0.025 max | 0.25-1.00 | 8.0-10.0 | 0.90-1.10 |
The mechanical strength of ASTM A213 Gr T9 Seamless Tubes makes them suitable for demanding service:
| Property | Value (Minimum, unless stated) |
| Tensile Strength | 60,000 psi (415 MPa) |
| Yield Strength | 30,000 psi (205 MPa) |
| Elongation (in 2in/50mm) | 30% |
| Hardness | Rockwell B: 85 max / Brinell: 179 ma |
| T5, T9, T11, T22 and T91 | |||
| Grade | Heat Treatment Type | Normalizing Temperature Range F [C] | Subcritical Annealing or Tempering Temperature Range F [C] |
| T5 (b,c) | Full or Isothermal Anneal | ||
| Normalize and Temper | ***** | 1250 [675] | |
| Subcritical Anneal (T5c only) | ***** | 1325 - 1375 [715 - 745] | |
| T9 | Full or Isothermal Anneal | ||
| Normalize and Temper | ***** | 1250 [675] | |
| T11 | Full or Isothermal Anneal | ||
| Normalize and Temper | ***** | 1200 [650] | |
| T22 | Full or Isothermal Anneal | ||
| Normalize and Temper | ***** | 1250 [675] | |
| T91 | Normalize and Temper | 1900-1975 [1040 - 1080] | 1350-1470 [730 - 800] |
| Quench and Temper | 1900-1975 [1040 - 1080] | 1350-1470 [730 - 800] |
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