Cast Stainless Steel Flange HK40, ACI

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. -: Cast Stainless Steel Flange HK40, ACI Product Information -:- For detailed product information, please contact sales. -: Cast Stainless Steel Flange HK40, ACI Synonyms -:- For detailed product information, please contact sales. -:

Cast Stainless Steel HK40, ACI Product Information -:- For detailed product information, please contact sales. -: ### **Technical Data Sheet: Cast Stainless Steel ACI HK-40** **Product Overview** ACI HK-40 is a high-carbon, austenitic heat-resistant cast steel defined by the Alloy Casting Institute (ACI). It is renowned for its exceptional high-temperature strength, outstanding resistance to oxidation (scaling), and good resistance to carburizing atmospheres. The "HK" designation signifies the 25% Chromium - 12% Nickel family, and the "40" indicates a nominal carbon content of 0.40%. This elevated carbon content is the key differentiator from HK30, providing superior creep and rupture strength, making HK-40 a premier choice for heavily loaded components in prolonged high-temperature service. --- #### **1. International Standards & Designations** ACI HK-40 is recognized globally under several major standards systems. | Standard Organization | Designation | Key Scope / Note | | :--- | :--- | :--- | | **ACI / SFSA (USA)** | **HK-40** | **Foundational Specification** | | **UNS (Unified Numbering System)** | **J94204** | Unified Number | | **ASTM International** | A297 Grade HK40 | General Heat-Resistant Castings | | **ASTM International** | A351/A351M Grade HK40 | Pressure-Containing Parts | | **European Norm (EN)** | **1.4848** | EN 10295 (Commonly used equivalent) | | **German (DIN)** | **G-X 40 CrNiSi 25-12** | - | | **Japanese (JIS)** | **SCH 22** | JIS G5121 | --- #### **2. Chemical Composition (Weight % per ACI)** The chemical composition is precisely balanced to deliver optimal high-temperature performance. | Element | Composition (%) | | :--- | :--- | | **Carbon (C)** | 0.35 - 0.45 | | **Chromium (Cr)** | 23.0 - 27.0 | | **Nickel (Ni)** | 19.0 - 22.0 | | **Silicon (Si)** | 1.75 max | | **Manganese (Mn)** | 2.00 max | | **Phosphorus (P)** | 0.04 max | | **Sulfur (S)** | 0.04 max | | **Iron (Fe)** | Balance | **Key Composition Rationale:** * **Chromium (Cr):** Forms a dense, adherent surface layer of chromium oxide (Cr₂O₃) that provides exceptional protection against oxidation and carburization at temperatures up to **1150°C (2100°F)**. * **Nickel (Ni):** Stabilizes the face-centered cubic (FCC) austenitic matrix, which provides inherent high-temperature strength, ductility, and remarkable resistance to thermal fatigue and creep deformation. * **Carbon (C):** The high carbon content is critical for enhancing elevated temperature strength. It contributes to solid solution strengthening and promotes the formation of stable chromium carbides, which significantly improve creep and rupture resistance. --- #### **3. Typical Physical & Mechanical Properties** **Physical Properties (At Room Temperature):** * **Density:** 7.78 g/cm³ (0.281 lb/in³) * **Melting Range:** ~1350 - 1400 °C (2460 - 2550 °F) * **Specific Heat:** 500 J/kg·K * **Thermal Conductivity:** ~14.0 W/m·K (at 100°C) * **Coefficient of Thermal Expansion:** ~16.0 x 10⁻⁶ /K (20 - 100°C) **Room Temperature Mechanical Properties (As-Cast or Heat-Treated):** * **Tensile Strength:** 620 MPa (90 ksi) min * **Yield Strength (0.2% Offset):** 310 MPa (45 ksi) min * **Elongation (% in 2in/50mm):** 10% min * **Hardness (Brinell):** 170 - 240 HB **High-Temperature Performance:** * **Oxidation Resistance:** Excellent, capable of withstanding continuous operation in oxidizing furnace atmospheres up to 1150°C. * **Creep & Rupture Strength:** Outstanding. HK-40 offers superior long-term load-bearing capability at high temperatures compared to lower-carbon grades like HK-30, making it ideal for pressure-containing parts. * **Carburization Resistance:** Good resistance to degradation in carbon-rich environments, such as those found in carburizing furnaces. --- #### **4. Product Applications** ACI HK-40 is utilized for complex, static cast components that operate under high mechanical loads and severe thermal conditions. **Primary Industry Applications:** * **Petrochemical & Refining:** * Fittings, valves, and pump casings for reformer furnace systems. * Tube headers, return bends, and manifolds. * Reactor components. * **Heat Treatment & Industrial Furnaces:** * Radiant tubes, retorts, and muffles. * Furnace trays, baskets, and grid fixtures. * Carburizing boxes and fixtures. * **Power Generation:** * Components for boiler systems and waste-to-energy plants. * High-temperature burner parts and support systems. --- #### **5. Fabrication & Heat Treatment** * **Casting:** Excellently suited for all static casting methods, including sand casting and investment casting, to produce intricate shapes. * **Machining:** Challenging due to its austenitic toughness, work-hardening tendency, and abrasive carbides. Requires powerful machinery, rigid setups, carbide tooling, and appropriate cutting parameters. * **Welding:** Weldable using processes like SMAW (Stick) and GTAW (TIG). Matching or over-alloyed filler metals (e.g., ENiCrFe-3) are recommended. **Post-weld heat treatment (Solution Annealing) is crucial** to dissolve detrimental carbides precipitated in the heat-affected zone and restore maximum ductility and corrosion resistance. * **Heat Treatment:** The standard practice is **Solution Annealing** at **1149°C - 1204°C (2100°F - 2200°F)**, followed by rapid cooling (water quench or fast air). This treatment ensures carbides are dissolved into the austenitic matrix, achieving optimal high-temperature properties and ductility. --- **Disclaimer:** The information provided herein is for reference purposes. Material properties can vary based on casting section size, heat treatment, and foundry process. For critical applications, consultation with the material supplier and reference to the full, published ACI and ASTM specifications is essential. -:- For detailed product information, please contact sales. -: Cast Stainless Steel HK40, ACI Specification Dimensions Size： Diameter 20-1000 mm Length <4217 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. -: Cast Stainless Steel HK40, ACI Properties -:- For detailed product information, please contact sales. -:

Applications of Cast Stainless Steel Flange HK40, ACI -:- For detailed product information, please contact sales. -: Chemical Identifiers Cast Stainless Steel Flange HK40, ACI -:- For detailed product information, please contact sales. -:

Packing of Cast Stainless Steel Flange HK40, ACI -:- 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 688 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