ASTM A 424 Type III, I-F Enamel Enameling Carbon Steel Flange

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. -: AK Steel Flange ASTM A 424 Type III, I-F Enamel Enameling Carbon Steel Flange Product Information -:- For detailed product information, please contact sales. -: AK Steel Flange ASTM A 424 Type III, I-F Enamel Enameling Carbon Steel Flange Synonyms -:- For detailed product information, please contact sales. -:

AK Steel ASTM A 424 Type III, I-F Enamel Enameling Carbon Steel Product Information -:- For detailed product information, please contact sales. -: **Product Name:** AK Steel ASTM A424 Type III, I-F Grade Enameling Steel --- ### **1. Overview** AK Steel's ASTM A424 Type III, based on Interstitial-Free (I-F) steelmaking technology, represents the premium tier of enameling steels engineered for exceptional formability and enamelability. This grade is specifically designed for the most demanding **two-coat cover coat enameling** processes, where severe deep drawing is required before porcelain application. The I-F chemistry virtually eliminates interstitial atoms (carbon and nitrogen), providing outstanding ductility and non-aging characteristics, which are critical for preventing defects like fishscaling after forming and firing. ### **2. International Standards** This product is manufactured to meet or exceed the requirements of the following primary standard: * **ASTM A424 / A424M:** Standard Specification for Steel Sheet for Porcelain Enameling. * This product specifically conforms to **Type III**, which is designated for steels requiring exceptional formability and resistance to fishscaling in two-coat systems. ### **3. Chemical Composition (Typical, Key Controlled Elements)** The hallmark of I-F steel is the ultra-low level of interstitial elements, stabilized by strong carbide/nitride formers. | Element | Content (Typical Weight %) | Purpose in Enameling & Forming | | :--- | :--- | :--- | | Carbon (C) | 0.005% max (Ultra-Low) | **Critical.** Minimized to eliminate strain aging and prevent carbon-related enamel defects (boiling, black specking). | | Nitrogen (N) | 0.004% max (Ultra-Low) | **Critical.** Minimized to eliminate strain aging, ensuring consistent ductility and preventing fishscaling. | | Titanium (Ti) | 0.05 - 0.15% | **Critical Stabilizer.** Added to tie up any residual carbon and nitrogen as stable Ti(C,N), rendering them inert. This is the core of the I-F (Interstitial-Free) mechanism. | | Niobium (Nb) | May be used alone or with Ti | Alternative/complementary stabilizer to Ti. Also forms stable carbides/nitrides and refines grain structure. | | Manganese (Mn) | 0.25% max | Kept low to maintain excellent formability and surface quality. | | Phosphorus (P) | 0.020% max | Kept very low for good weldability and enamel adherence. | | Sulfur (S) | 0.025% max | Controlled for steel cleanliness. | | **Note:** | This is a fully stabilized, ultra-low interstitial (ULI) steel. The combined (Ti+Nb) to (C+N) ratio is carefully controlled. | | ### **4. Physical & Mechanical Properties (As-Supplied, typically in Enameling Quality "EQ" Temper)** Properties are optimized for maximum drawability. | Property | Value / Description | Condition / Note | | :--- | :--- | :--- | | **Yield Strength** | 20 - 30 ksi (140 - 205 MPa) | Very low yield point, ideal for deep drawing. | | **Tensile Strength** | 35 - 45 ksi (240 - 310 MPa) | | | **Elongation (min)** | 40% - 50% (in 2") | **Exceptional ductility.** Enables the most severe deep-drawing operations. | | **Strain-Hardening Exponent (n-value)** | ≥ 0.22 | High, indicating excellent uniform elongation and resistance to thinning during stretching. | | **Plastic Strain Ratio (r-value)** | ≥ 1.8 | High, indicating excellent deep-drawing ability and resistance to earring. | | **Key Enameling Property** | **Fishscale Resistance:** Excellent. The elimination of interstitial elements makes it inherently immune to strain-age embrittlement, the primary cause of fishscaling. | Ideally suited for parts that undergo severe deformation before enameling. | | **Surface Finish** | **Extra Smooth (XS)** or specific enamel-grade finish. Critical for a flawless final porcelain appearance. | | ### **5. Key Features & Advantages (I-F Enameling Steel)** * **Unmatched Formability:** Offers the highest level of deep drawability and stretchability among enameling steels. Capable of producing complex, deeply drawn parts (e.g., kitchen sinks, bathtubs) without cracking or tearing. * **Non-Aging & Consistent Properties:** The I-F stabilization locks in ductility. The steel does not age-harden at room temperature, ensuring consistent forming behavior over time. * **Superior Fishscale Resistance:** The complete stabilization of carbon and nitrogen provides inherent and guaranteed protection against fishscaling, even after severe forming. * **Optimized for Two-Coat Systems:** Designed as the ideal substrate for high-quality ground-coat/base-coat + cover-coat enameling processes, where formability and defect resistance are paramount. * **Excellent Surface Quality:** Produced to stringent surface standards necessary for high-gloss, decorative porcelain finishes. ### **6. Product Applications** This premium-grade steel is used for the most form-intensive and high-value enameled products. * **Deep-Drawn Appliances:** Bathroom sinks (lavatories), kitchen sinks, bathtubs, shower bases. * **Major Appliances:** Complexly formed oven cavities, dishwasher tubs, and refrigerator liners where severe draws are required. * **Architectural Panels:** Formed cladding elements and signage requiring both deep draws and a durable enamel finish. * **High-End Cookware & Sanitaryware.** ### **7. Fabrication & Processing Notes** * **Forming:** Can be subjected to extreme deep-drawing and stretching operations. Due to its non-aging nature, parts can be stored between forming and enameling without loss of properties. * **Enameling Process:** **Exclusively recommended for two-coat systems.** A ground coat (which contains adherence-promoting oxides like CoO and NiO) must be applied first to ensure proper bond, followed by the decorative cover coat. * **Cleaning & Pretreatment:** Standard alkaline cleaning and acid pickling (often with a nickel flash) are essential before applying the ground coat. * **Welding:** Resistance spot welding is common. The I-F composition provides good weldability, but parameters may need optimization for the ultra-low carbon content. --- **Disclaimer:** The information provided is for reference purposes. For critical applications, always consult the official Technical Data Sheets (TDS) from AK Steel (now part of **Cleveland-Cliffs Inc.**) and the relevant ASTM standards for the most current and precise specifications, processing guidelines, and performance guarantees. The successful application of this steel depends on a controlled enameling system (pretreatment, ground coat, firing cycle). -:- For detailed product information, please contact sales. -: AK Steel ASTM A 424 Type III, I-F Enamel Enameling Carbon Steel Specification Dimensions Size： Diameter 20-1000 mm Length <4579 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. -: AK Steel ASTM A 424 Type III, I-F Enamel Enameling Carbon Steel Properties -:- For detailed product information, please contact sales. -:

Applications of AK Steel Flange ASTM A 424 Type III, I-F Enamel Enameling Carbon Steel Flange -:- For detailed product information, please contact sales. -: Chemical Identifiers AK Steel Flange ASTM A 424 Type III, I-F Enamel Enameling Carbon Steel Flange -:- For detailed product information, please contact sales. -:

Packing of AK Steel Flange ASTM A 424 Type III, I-F Enamel Enameling Carbon Steel Flange -:- 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 1050 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