Cast Stainless Steel Flange HK30, UNS J94203

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, UNS J94203 Product Information -:- For detailed product information, please contact sales. -: Cast Stainless Steel Flange HK30, UNS J94203 Synonyms -:- For detailed product information, please contact sales. -:

Cast Stainless Steel HK30, UNS J94203 Product Information -:- For detailed product information, please contact sales. -: ### **Technical Data Sheet: Cast Stainless Steel HK30 (UNS J94203)** **Product Overview** Cast Stainless Steel HK30, standardized as UNS J94203, is a high-carbon, austenitic heat-resistant alloy. It is specifically designed for sustained service at high temperatures, offering exceptional resistance to oxidation (scaling) and creep strength. Its common "HK" designation originates from the Alloy Casting Institute (ACI), and it is a cornerstone material for critical components in heat processing, petrochemical, and power generation industries. --- #### **1. International Standard Equivalents** HK30 is recognized globally under the following standard specifications: | Standard Organization | Designation | Applicable Specification | | :--- | :--- | :--- | | **UNS (Unified Numbering System)** | **J94203** | - | | **ACI / SFSA (USA)** | **HK-30** | - | | **ASTM International** | **HK30** | ASTM A297 / ASTM A351 (for pressure-containing parts) | | **European Norm (EN)** | **1.4836** | EN 10295 | | **German (DIN)** | **G-X 40 CrNiSi 25-12** | DIN 17445 | | **Japanese (JIS)** | **SCH 21** | JIS G5121 | --- #### **2. Chemical Composition (Weight %)** The composition is balanced to maximize high-temperature performance. | Element | Minimum (%) | Maximum (%) | | :--- | :--- | :--- | | **Carbon (C)** | 0.25 | 0.35 | | **Chromium (Cr)** | 23.0 | 27.0 | | **Nickel (Ni)** | 19.0 | 22.0 | | **Silicon (Si)** | - | 1.75 | | **Manganese (Mn)** | - | 2.00 | | **Phosphorus (P)** | - | 0.04 | | **Sulfur (S)** | - | 0.04 | | **Iron (Fe)** | Balance | | **Key Composition Rationale:** * **Chromium (Cr):** Provides superior oxidation and carburization resistance by forming a protective, adherent layer of chromium oxide (Cr₂O₃). * **Nickel (Ni):** Stabilizes the austenitic matrix, providing high-temperature strength, ductility, and resistance to thermal cycling and creep deformation. * **Carbon (C):** Enhances elevated temperature strength through solid solution strengthening. The higher carbon content (compared to the "H" grade) is key to its creep resistance. --- #### **3. Typical Physical & Mechanical Properties** **Physical Properties (At Room Temperature):** * **Density:** 7.78 g/cm³ (0.281 lb/in³) * **Melting Point:** ~1400 - 1450 °C (2550 - 2640 °F) * **Specific Heat (20°C):** 500 J/kg·K * **Thermal Conductivity:** ~14.5 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 Solution Annealed - Typical):** * **Tensile Strength:** 510 MPa (74 ksi) min * **Yield Strength (0.2% Offset):** 240 MPa (35 ksi) min * **Elongation (% in 2in/50mm):** 10% min * **Hardness (Brinell):** 170 - 220 HB **High-Temperature Performance:** * **Maximum Service Temperature:** Up to **1150°C (2100°F)** in oxidizing environments. * **Oxidation Resistance:** Excellent. The stable chromium oxide layer provides long-term protection against scaling. * **Creep & Rupture Strength:** Excellent resistance to deformation under stress at high temperatures, making it suitable for load-bearing applications like radiant tubes and furnace supports. --- #### **4. Product Applications** HK30 is the preferred material for complex, load-bearing components operating under severe thermal stress. Its castability allows for intricate geometries not feasible with wrought products. **Primary Industry Applications:** * **Heat Treatment & Industrial Furnaces:** * **Radiant Tubes** (for carburizing, carbonitriding, and annealing furnaces) * Furnace Rolls, Trays, Baskets, and Fixtures * Muffles and Retorts * Burner Nozzles * **Petrochemical & Refining:** * Tube Hangers and Supports in Pyrolysis Heaters & Steam Methane Reformers (SMR) * Transfer Lines and Fittings * **Power Generation:** * Components in boiler systems * Parts for waste-to-energy and biomass incineration plants * **Glass Manufacturing:** * Molds and hardware for glass container production. --- #### **5. Fabrication Notes** * **Casting:** Excellently suited for sand casting and investment casting processes. * **Machining:** Difficult due to its austenitic structure and work-hardening tendency. Requires rigid setups, slow speeds, high feeds, and carbide tooling. * **Welding:** Weldable using shielded metal arc welding (SMAW) or gas tungsten arc welding (GTAW) with matching or over-alloyed filler metals (e.g., ENiCrFe-3). Post-weld heat treatment (solution annealing) is recommended to restore optimum properties. * **Heat Treatment:** The standard heat treatment is **Solution Annealing** at **1065°C - 1150°C (1950°F - 2100°F)**, followed by rapid cooling to dissolve carbides and ensure maximum corrosion and oxidation resistance. --- **Disclaimer:** The values provided are typical and for informational purposes. Actual properties may vary based on casting section size, heat treatment, and foundry practice. For design and procurement, the relevant ASTM, EN, or other international material specifications must be consulted. -:- For detailed product information, please contact sales. -: Cast Stainless Steel HK30, UNS J94203 Specification Dimensions Size： Diameter 20-1000 mm Length <4214 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, UNS J94203 Properties -:- For detailed product information, please contact sales. -:

Applications of Cast Stainless Steel Flange HK30, UNS J94203 -:- For detailed product information, please contact sales. -: Chemical Identifiers Cast Stainless Steel Flange HK30, UNS J94203 -:- For detailed product information, please contact sales. -:

Packing of Cast Stainless Steel Flange HK30, UNS J94203 -:- 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 685 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