ASTM A 424 Type II, VIT-PLUS® DS 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 II, VIT-PLUS® DS Enameling Carbon Steel Flange Product Information -:- For detailed product information, please contact sales. -: AK Steel Flange ASTM A 424 Type II, VIT-PLUS® DS Enameling Carbon Steel Flange Synonyms -:- For detailed product information, please contact sales. -:

AK Steel ASTM A 424 Type II, VIT-PLUS® DS Enameling Carbon Steel Product Information -:- For detailed product information, please contact sales. -: **Product Name:** AK Steel ASTM A424 Type II, VIT-PLUS® DS Enameling Carbon Steel --- ### **1. Overview** AK Steel's VIT-PLUS® DS is a specialized, fully stabilized enameling steel conforming to **ASTM A424 Type II**. Designed for single-coat **Direct-On (DS)** porcelain enameling processes, this product offers a superior balance of formability, surface quality, and enamel defect resistance. The "VIT-PLUS" designation signifies its enhanced performance over standard enameling steels, particularly in its ability to withstand the demanding direct application of a single porcelain layer without common flaws such as fishscaling or reboil. It is engineered for high-volume production of durable, high-gloss enameled components where cost efficiency and performance are critical. --- ### **2. International Standards** This product is manufactured to meet or exceed the specifications of the following standards: - **Primary Standard:** **ASTM A424 / A424M** – Standard Specification for Steel Sheet for Porcelain Enameling. - Compliant with **Type II**: Steel intended for direct-on enameling, requiring controlled chemistry for fishscale resistance. - **Industry Reference:** Often aligns with typical automotive and appliance material specifications for porcelain enameling substrates. --- ### **3. Chemical Composition (Typical)** The chemistry is tightly controlled to ensure optimal enamel adherence and resistance to defects during the high-temperature firing process. | Element | Content (Weight %, Max or Typical) | Role in Enameling Performance | | :------------- | :-------------------------------------------------------------- | :-------------------------------------------------------------- | | **Carbon (C)** | 0.005% max (Ultra-Low) | **Critical.** Minimizes gas evolution (CO/CO₂) during firing, preventing blisters, boils, and black specking. | | **Manganese (Mn)** | 0.35% max | Maintains steel strength and solidity; kept low to aid formability and enamel adherence. | | **Phosphorus (P)** | 0.020% max | Kept very low to promote good weldability and enamel bond. | | **Sulfur (S)** | 0.025% max | Controlled for steel cleanliness and surface quality. | | **Titanium (Ti)** | 0.15 - 0.25% (Typical) | **Key Stabilizer.** Forms stable carbides and nitrides, effectively "locking up" residual interstitials to prevent fishscaling and strain aging. | | **Nitrogen (N)** | Controlled to very low levels | Minimized and stabilized to prevent enamel defects. | | **Aluminum (Al)** | May be present as a deoxidizer | Contributes to a clean steel microstructure. | **Key Characteristic:** This is a **Titanium-Stabilized, Ultra-Low Carbon (ULC)** steel. The Ti to C/N ratio is optimized for direct-on enameling. --- ### **4. Physical & Mechanical Properties (As-Supplied, Temper Rolled)** | Property | Typical Value / Range | Notes | | :-------------------------- | :------------------------------------------------- | :-------------------------------------------------------------------- | | **Yield Strength** | 25 - 35 ksi (170 - 240 MPa) | Provides a good balance of strength and formability. | | **Tensile Strength** | 40 - 52 ksi (275 - 360 MPa) | | | **Elongation (in 2")** | 30% - 40% (minimum typically ≥ 28%) | Good ductility for moderate forming and drawing operations. | | **Hardness (Rockwell B)** | 45 - 65 HRB | | | **Surface Finish** | **Enameling Quality (EQ)** – Extra Smooth (XS) | A pristine, defect-free surface is essential for direct-on enamel application. | | **Primary Enameling Property** | **Excellent Fishscale Resistance** | Certified to pass standard fishscale tests due to Ti stabilization. | | **Suitability** | Optimized for **Direct-On Single-Coat** Enameling | Eliminates the need for a ground coat, reducing process steps and cost. | --- ### **5. Key Features & Advantages** - **Direct-On Enameling Efficiency:** Engineered specifically for single-coat application, reducing material consumption, furnace firing time, and overall production costs compared to two-coat systems. - **Superior Fishscale Resistance:** The titanium-stabilized, ultra-low carbon chemistry provides inherent and reliable protection against fishscaling, a primary failure mode in enameling. - **Excellent Surface Quality:** Produced with a superior surface finish (XS) essential for achieving a high-gloss, defect-free porcelain appearance directly on the steel. - **Good Formability & Consistency:** Offers reliable ductility for forming into typical appliance and architectural shapes, with consistent batch-to-batch performance. - **Weldability:** Suitable for standard resistance spot welding, facilitating assembly in appliance manufacturing. --- ### **6. Product Applications** VIT-PLUS® DS is the preferred substrate for a wide range of high-quality, single-coat porcelain enameled products. - **Major Appliances:** Oven and range cavities, broiler drawers, cooktop panels, dishwasher tub interiors, and microwave oven liners. - **Water Heaters & Heat Exchangers:** Interior tanks and components requiring a durable, corrosion-resistant glass lining. - **Architectural & Building Products:** Interior wall panels, decorative panels, and signage. - **Commercial/Residential:** Cookware, barbecue grills, fireplace surrounds, and sanitaryware. --- ### **7. Fabrication & Processing Notes** - **Forming:** Should be formed in the as-supplied temper-rolled condition. The steel is suitable for moderate drawing and bending. - **Cleaning & Pretreatment:** **Critical Step.** Must undergo thorough alkaline cleaning, rinsing, acid pickling (sulfuric or hydrochloric), and a nickel flash pretreatment to ensure proper enamel adherence. - **Firing:** Typical direct-on enamel firing is performed at temperatures between **1450°F - 1550°F (790°C - 845°C)**. The steel's properties remain stable in this range. - **Welding:** Resistance spot welding is standard. For arc welding, specific procedures are required, and coating the weld zone with enamel may be challenging. --- **Disclaimer:** *VIT-PLUS® is a registered trademark of Cleveland-Cliffs Inc. (formerly AK Steel).* The information provided is for general reference. For production use, always consult the latest official **Technical Data Sheet (TDS)** from Cleveland-Cliffs Inc. and the complete **ASTM A424** standard. Successful enameling depends on the entire system—steel, pretreatment, enamel slip, and firing cycle—all of which must be precisely controlled. -:- For detailed product information, please contact sales. -: AK Steel ASTM A 424 Type II, VIT-PLUS® DS Enameling Carbon Steel Specification Dimensions Size： Diameter 20-1000 mm Length <4580 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 II, VIT-PLUS® DS Enameling Carbon Steel Properties -:- For detailed product information, please contact sales. -:

Applications of AK Steel Flange ASTM A 424 Type II, VIT-PLUS® DS Enameling Carbon Steel Flange -:- For detailed product information, please contact sales. -: Chemical Identifiers AK Steel Flange ASTM A 424 Type II, VIT-PLUS® DS Enameling Carbon Steel Flange -:- For detailed product information, please contact sales. -:

Packing of AK Steel Flange ASTM A 424 Type II, VIT-PLUS® DS 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 1051 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