ASTM A213 T9 9Cr-1Mo Steel Flange TUBES FOR BOILERS AND HEAT EXCHANGERS (STBA 26)

1,We Manufacturing processes are primarily classified into four types: 1:Forging, 2:Casting, 3:Cutting, 4:Rolling. 2,We can manufacture in accordance with these standards. Standards: GB Series (Chinese Standards), JB Series (Machinery Standards), HG Series (Chemical Industry Standards), ASME B16.5 (American Standards), BS4504 (British Standards), DIN (German Standards), and JIS (Japanese Standards). Internationally, there are two primary systems of pipe flange standards: the European system, represented by the German DIN standards (including those of the former Soviet Union), and the American system, represented by the US ANSI pipe flange standards. Other common standards include: the Chinese Ministry of Machinery Industry standards (JB series), the Ministry of Chemical Industry standards (HG series), the Chinese National Standard *GB/T 9112–9124-2010 Steel Pipe Flanges*, as well as US standards (ASME B16.5), British standards (BS4504), German standards (DIN), Japanese standards (JIS), and marine standards (CBM), among others. The nominal pressure ratings for the PN series are designated by "PN" and comprise the following nine levels: PN2.5, PN6, PN10, PN16, PN25, PN40, PN63, PN100, and PN160. The nominal pressure ratings for the Class series are designated by "Class" and comprise the following six levels: Class150, Class300, Class600, Class900, Class1500, and Class2500. Flange Classification 1. **According to Chemical Industry Standards:** Flanges are classified as follows: Plate Flat Welding Flange (PL), Necked Flat Welding Flange (SO), Necked Butt Welding Flange (WN), Integral Flange (IF), Socket Welding Flange (SW), Threaded Flange (Th), Butt Welding Ring Loose Flange (PJ/SE), Blind Flange (BL), Flat Welding Ring Loose Flange (PJ/PJ), and Lined Blind Flange (BL(s)). 2. **According to Petrochemical (SH) Industry Standards:** Flanges are classified as follows: Threaded Flange (PL), Butt Welding Flange (WN), Flat Welding Flange (SO), Socket Welding Flange (SW), Loose Flange (LJ), and Blind Flange (no specific designation). 3. **According to Machinery (JB) Industry Standards:** Flanges are classified as follows: Integral Flange, Butt Welding Flange, Plate Flat Welding Flange, Butt Welding Ring Plate Loose Flange, Flat Welding Ring Plate Loose Flange, Lap Joint Ring Plate Loose Flange, and Blind Flange. 4. **According to Connection Method/Type:** Flanges are classified as follows: Plate Flat Welding Flange, Necked Flat Welding Flange, Necked Butt Welding Flange, Socket Welding Flange, Threaded Flange, Blind Flange, Necked Butt Welding Ring Loose Flange, Flat Welding Ring Loose Flange, Ring-Type Joint (RTJ) Flange and Blind Flange, Large-Diameter Plate Flange, Large-Diameter High-Neck Flange, Figure-8 Blind Plate, Butt Welding Ring Loose Flange, etc. 5. **According to the Component Being Connected:** Flanges can be classified into Vessel Flanges and Pipe Flanges. 6. **According to Structural Type:** Flanges include Integral Flanges, Threaded Flanges, Flat Welding Flanges, Butt Welding Flanges, Lap Joint (Loose/Swivel) Flanges, and Blind Flanges. A flange—also referred to as a flange plate or rim—is a component used to connect shafts to one another, or, more commonly, to join the ends of pipes. Flanges are also utilized at the inlet and outlet ports of equipment to facilitate connections between two devices—for instance, the flange on a speed reducer. A "flange connection" or "flanged joint" refers to a detachable joint assembly comprising three interconnected elements—a flange, a gasket, and bolts—that together form a sealed structural unit. In the context of piping systems, a "pipe flange" specifically denotes a flange used for plumbing within the installation; when applied to equipment, it refers to the inlet or outlet flange of that specific device. Flanges feature a series of holes through which bolts are inserted to securely fasten the two flanges together, while a gasket placed between the flanges ensures a leak-proof seal. Flanges are broadly categorized into three types: threaded (screw-in) flanges, welded flanges, and clamp-type flanges. Flanges are invariably used in pairs; threaded flanges are suitable for low-pressure piping applications, whereas welded flanges are required for systems operating at pressures exceeding 4 kilograms per square centimeter. A sealing gasket is inserted between the two flange plates, which are then firmly secured using bolts. The thickness of a flange—as well as the specifications of the bolts used to fasten it—vary depending on the specific pressure rating required for the application. When connecting equipment such as water pumps or valves to piping systems, the corresponding connection points on these devices are often manufactured in the shape of a matching flange; this method of attachment is also referred to as a "flange connection." Generally, any connecting component that utilizes bolts to join and seal the perimeters of two flat surfaces—such as the joints in ventilation ducts—is termed a "flange"; such components may collectively be classified as "flange-type parts." However, since such a connection often constitutes merely a *portion* of a larger device—for instance, the interface between a flange and a water pump—it would be inappropriate to classify the entire water pump itself as a "flange-type part." Conversely, smaller components—such as valves—that feature such flanged interfaces may indeed be appropriately categorized as "flange-type parts." -:- For detailed product information, please contact sales. -: ASTM A213 T9 9Cr-1Mo Steel Flange TUBES FOR BOILERS AND HEAT EXCHANGERS (STBA 26) Product Information -:- For detailed product information, please contact sales. -: ASTM A213 T9 9Cr-1Mo Steel Flange TUBES FOR BOILERS AND HEAT EXCHANGERS (STBA 26) Synonyms -:- For detailed product information, please contact sales. -:

ASTM A213 T9 9Cr-1Mo STEEL TUBES FOR BOILERS AND HEAT EXCHANGERS (STBA 26) Product Information -:- For detailed product information, please contact sales. -: ## **Product Datasheet: ASTM A213 T9 / 9Cr-1Mo Alloy Steel Tube (STBA 26)** **Product Overview** ASTM A213 T9, commercially designated as **9Cr-1Mo** steel, is a **high-chromium ferritic/martensitic alloy steel** seamless tube engineered for **ultra-high temperature service** in aggressive environments. With a nominal composition of 9% chromium and 1% molybdenum, this grade represents a major advancement in elevated temperature performance, offering exceptional **creep strength, oxidation resistance, and microstructural stability** at temperatures up to 1200°F (650°C). It bridges the gap between conventional low-alloy steels and austenitic stainless steels, providing superior thermal fatigue resistance and lower thermal expansion than austenitics. T9 is a critical material for advanced superheater/reheater sections in high-efficiency power plants and for high-severity process heater tubes. Its Japanese Industrial Standard (JIS) designation is **STBA 26**. **Key International Standards** * **Primary Standard:** **ASTM A213 / A213M** - Standard Specification for Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes. * **Governing Specification:** This product conforms to the requirements for **Grade T9** within ASTM A213. * **ASME Designation:** **SA-213 T9** - The mandatory ASME Boiler and Pressure Vessel Code (BPVC) designation. * **Commercial/Alternate Designations:** * **9Cr-1Mo** (Common industry name) * **JIS G 3462 STBA 26** (Japanese Standard) * **DIN 17175 X12CrMo9-1** * **EN 10216-2 X11CrMo9-1** * **Heat Treatment:** Supplied in the **normalized and tempered** condition to develop a fine, tempered martensitic microstructure, which is essential for its high-temperature properties. **Chemical Composition (Weight % - ASTM A213 T9 Requirements)** | Element | ASTM A213 T9 Requirement | Typical Range / Aim (STBA 26) | | :--- | :--- | :--- | | **Carbon (C)** | 0.15% max | 0.08 - 0.12% | | **Manganese (Mn)** | 0.30 - 0.60% | 0.40 - 0.60% | | **Phosphorus (P)** | 0.025% max | ≤ 0.020% | | **Sulfur (S)** | 0.025% max | ≤ 0.015% | | **Silicon (Si)** | 0.25 - 1.00% | 0.50 - 0.80% | | **Chromium (Cr)** | **8.00 - 10.00%** | 8.50 - 9.50% | | **Molybdenum (Mo)** | **0.90 - 1.10%** | 0.95 - 1.05% | | **Carbon Equivalent (C.E. IIW)** | -- | Typically 0.55 - 0.65 | **Physical & Mechanical Properties (Room Temperature)** | Property | Requirement (ASTM A213 T9) | Typical Performance / Notes | | :--- | :--- | :--- | | **Tensile Strength** | 60 ksi (415 MPa) min | 75 - 95 ksi (517 - 655 MPa) | | **Yield Strength (0.2% Offset)** | 30 ksi (205 MPa) min | 45 - 60 ksi (310 - 414 MPa) | | **Elongation in 2" (Min)** | 30% | 25 - 30% | | **Hardness (Approx., HB)** | -- | ~180-230 HB | | **Maximum Recommended Metal Temperature** | -- | **Up to ~1200°F (650°C)** for prolonged service. The high chromium content provides outstanding oxidation and hot corrosion resistance, while the martensitic structure offers excellent creep strength. | | **Key Feature** | **High-Temperature Martensitic Alloy:** Combines the oxidation resistance of a high-chromium steel with the thermal conductivity and low thermal expansion of a ferritic/martensitic alloy, making it ideal for advanced high-temperature heat exchangers and boilers where thermal cycling is a concern. | **Product Applications** ASTM A213 T9 / STBA 26 tubes are specified for the most severe high-temperature services in power and process industries. * **Superheater & Reheater Tubes:** Final-stage, highest-temperature sections in **advanced supercritical and ultra-supercritical (USC) coal-fired boilers**. * **Process Heater Tubes:** Radiant and convection tubes in high-temperature refinery heaters (e.g., ethylene cracking furnaces, reformer heaters). * **Heat Exchanger Tubes:** For high-temperature gas-to-gas or gas-to-liquid exchangers in syngas, hydrogen, and chemical processing. * **Steam Piping & Headers** for high-temperature steam lines. * **Waste-to-Energy and Biomass Boiler Tubes** where chloride and alkali corrosion are concerns. **Advantages & Fabrication Notes** * **Critical Welding & Heat Treatment:** Welding T9 is a specialized operation due to its high hardenability and martensitic structure. It is prone to cold cracking and requires precise thermal control. * **Preheat:** Mandatory and high, typically **450-600°F (232-316°C)**. * **Low-Hydrogen Practice:** Essential. Matching filler metals (e.g., AWS ER505, E505-XX) are required. * **Post-Weld Heat Treatment (PWHT):** **Always required.** Temperatures are typically **1350-1450°F (732-788°C)**. **Controlled heating and cooling rates are critical** to achieve proper tempering of the martensitic HAZ and base metal without causing excessive grain growth or re-hardening. * **Exceptional Oxidation & Creep Resistance:** The 9% Cr content provides a highly protective, stable oxide layer, offering superior resistance to steam-side oxidation and exfoliation compared to lower alloys. Its creep rupture strength surpasses that of T22 and T91 at temperatures above ~1050°F (566°C). * **Good Thermal Fatigue Resistance:** Lower coefficient of thermal expansion compared to austenitic stainless steels reduces thermal stresses during startup/shutdown cycles. * **Potential for Temper Embrittlement:** Can be susceptible if improperly heat-treated or if residual elements are not controlled. Proper PWHT and chemistry control are essential. * **Code Compliance:** Fully recognized in the **ASME BPVC, Section I** and **Section VIII**, with published allowable stresses up to 1200°F (650°C). **Disclaimer:** This datasheet provides general information on **ASTM A213 T9 (9Cr-1Mo) / STBA 26** alloy steel tubes. For procurement, specify the complete standard and grade (T9). **Design must be based on ASME BPVC allowable stress values.** Welding and PWHT of T9 require expert knowledge; procedures **must be rigorously qualified per ASME Section IX**, often involving advanced techniques like temper bead welding for repairs. The material's high hardenability makes it crack-sensitive; improper handling will lead to failure. Material selection should be validated for the specific service environment, considering both temperature and corrosivity. Fabrication must be overseen by personnel with specialized experience in high-chromium martensitic steels. This material is a precursor to the more advanced **T91/P91 (9Cr-1Mo-V-Nb)** grade, which offers enhanced creep strength. -:- For detailed product information, please contact sales. -: ASTM A213 T9 9Cr-1Mo STEEL TUBES FOR BOILERS AND HEAT EXCHANGERS (STBA 26) Specification Dimensions Size： Diameter 20-1000 mm Length <4708 mm Size:We can customized as required Standard： Per your request or drawing We can customized as required Properties（Theoretical） Chemical Composition -:- For detailed product information, please contact sales. -: ASTM A213 T9 9Cr-1Mo STEEL TUBES FOR BOILERS AND HEAT EXCHANGERS (STBA 26) Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A213 T9 9Cr-1Mo Steel Flange TUBES FOR BOILERS AND HEAT EXCHANGERS (STBA 26) -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A213 T9 9Cr-1Mo Steel Flange TUBES FOR BOILERS AND HEAT EXCHANGERS (STBA 26) -:- For detailed product information, please contact sales. -:

Packing of ASTM A213 T9 9Cr-1Mo Steel Flange TUBES FOR BOILERS AND HEAT EXCHANGERS (STBA 26) -:- For detailed product information, please contact sales. -: Standard Packing: -:- For detailed product information, please contact sales. -: Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and Steel Flange drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 1179 gallon liquid totes Special package is available on request. E FORUs’ is carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition