Cast Stainless Steel Flange HK30, 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 HK30, ACI Product Information -:- For detailed product information, please contact sales. -: Cast Stainless Steel Flange HK30, ACI Synonyms -:- For detailed product information, please contact sales. -:

Cast Stainless Steel HK30, ACI Product Information -:- For detailed product information, please contact sales. -: ### **Technical Data Sheet: Cast Stainless Steel HK30 / ACI HK-30** **Overview** HK30 is a heat-resistant austenitic stainless steel supplied in the static cast form. It is part of the 25Cr-12Ni family and is renowned for its exceptional strength and resistance to oxidation (scaling) at high temperatures. Its primary use is in applications involving prolonged exposure to temperatures ranging from 650°C to 1150°C (1200°F to 2100°F). The "HK" designation is from the Alloy Casting Institute (ACI), now part of the Steel Founders' Society of America (SFSA). --- #### **1. International Standards & Designations** HK30 is recognized under several international standards systems. The most common equivalents are: | Standard Organization | Designation | | :--- | :--- | | **ACI / SFSA (USA)** | **HK-30** | | **UNS (Unified Numbering System)** | **J94203** | | **ASTM A297 / A351** | **HK30** | | **EN (European Norm)** | **1.4836** | | **DIN (Germany)** | **G-X 40 CrNiSi 25-12** | | **JIS (Japan)** | **SCH 21** | --- #### **2. Chemical Composition** The chemical composition (in weight percent) is a key factor in HK30's high-temperature performance. Typical ranges are as follows: | Element | Composition (%) | | :--- | :--- | | **Carbon (C)** | 0.25 - 0.35 | | **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 Notes:** * **High Chromium:** Provides excellent resistance to oxidation and carburization. * **High Nickel:** Stabilizes the austenitic structure, providing strength and resistance to thermal fatigue and creep. * **Controlled Carbon:** The carbon content enhances high-temperature strength through solid solution strengthening. --- #### **3. Physical & Mechanical Properties** The properties of HK30 are highly dependent on temperature. The values below are typical for material in the as-cast or solution-annealed condition. **Physical Properties (at Room Temperature):** * **Density:** 7.75 - 7.80 g/cm³ * **Melting Range:** ~ 1400 - 1450 °C * **Specific Heat:** 500 J/kg·K * **Thermal Conductivity:** ~ 15 W/m·K * **Coefficient of Thermal Expansion:** ~ 16.0 x 10⁻⁶ /K (20 - 100°C) **Mechanical Properties (Room Temperature - Typical):** * **Tensile Strength:** 510 MPa (74 ksi) min * **Yield Strength (0.2% Offset):** 240 MPa (35 ksi) min * **Elongation (% in 2 inches):** 10% min * **Hardness (Brinell):** 170 - 220 HB **High-Temperature Performance:** * **Oxidation Resistance:** Excellent up to 1150°C (2100°F). The high chromium content forms a stable, adherent layer of chromium oxide (Cr₂O₃) that protects the underlying metal from further degradation. * **Creep Strength:** Good resistance to deformation under sustained mechanical load at high temperatures. * **Thermal Fatigue Resistance:** The austenitic structure provides good resistance to cracking caused by repeated heating and cooling cycles. --- #### **4. Product Applications** HK30 is the material of choice for demanding high-temperature components across various industries. Its castability allows for the production of complex shapes that are difficult or impossible to form by other methods. **Primary Applications:** * **Heat Treatment Industry:** * Radiant tubes for carburizing, carbonitriding, and annealing furnaces. * Furnace rolls, trays, baskets, and fixtures. * Muffles and retorts. * **Petrochemical & Refining:** * Tube hangers and supports in refinery heaters and steam methane reformers. * Reformers and cracking furnace components. * **Power Generation:** * Components for boiler systems, such as burner nozzles and supports. * Parts for waste-to-energy and biomass power plants. * **Glass Manufacturing:** * Mold components for glass container production. --- #### **5. Fabrication & Heat Treatment** * **Casting:** HK30 is readily cast using standard foundry practices for austenitic stainless steels, such as investment casting and sand casting. * **Machining:** It has low machinability compared to carbon steels due to its toughness and work-hardening tendency. Carbide tools and rigid setups are recommended. * **Welding:** It can be welded using matching or over-alloyed filler metals (e.g., ENiCrFe-3). Pre-heating is generally not required, and post-weld heat treatment (solution annealing) is often recommended to restore corrosion and oxidation resistance. * **Heat Treatment:** The standard heat treatment is **Solution Annealing**, typically performed at 1065°C - 1150°C (1950°F - 2100°F), followed by rapid cooling (quenching) in water or air to prevent carbide precipitation and maintain optimal properties. --- **Disclaimer:** The information provided herein is for reference purposes only. 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 specifications (e.g., ASTM A297) is essential. -:- For detailed product information, please contact sales. -: Cast Stainless Steel HK30, ACI Specification Dimensions Size： Diameter 20-1000 mm Length <4213 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 HK30, ACI Properties -:- For detailed product information, please contact sales. -:

Applications of Cast Stainless Steel Flange HK30, ACI -:- For detailed product information, please contact sales. -: Chemical Identifiers Cast Stainless Steel Flange HK30, ACI -:- For detailed product information, please contact sales. -:

Packing of Cast Stainless Steel Flange HK30, 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 684 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