High-Nickel Gray Iron Flange, corrosion resistant

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. -: High-Nickel Gray Iron Flange, corrosion resistant Product Information -:- For detailed product information, please contact sales. -: High-Nickel Gray Iron Flange, corrosion resistant Synonyms -:- For detailed product information, please contact sales. -:

High-Nickel Gray Iron, corrosion resistant Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: High-Nickel Gray Iron, Corrosion Resistant (Ni-Resist)** High-Nickel Gray Iron, commonly known as **Ni-Resist**, is a family of austenitic cast irons specifically engineered for superior corrosion resistance and performance in extreme environments. By incorporating significant amounts of nickel (and often chromium and copper), these alloys develop a stable austenitic matrix, effectively resisting graphitic corrosion, growth, and scaling at elevated temperatures, while providing excellent resistance to a wide range of corrosive media, including acids, alkalis, and saline solutions. This material uniquely combines the casting ease and machinability of gray iron with the durability typically associated with high-alloy materials, making it a cost-effective solution for demanding applications. --- ### **1. Chemical Composition** The corrosion resistance is primarily achieved through a carefully balanced chemistry. A typical specification for the most common corrosion-resistant grade is outlined below, along with key alloying elements' roles. **Typical Composition (Grade D-2S / ASTM A436 Type 1b):** | Element | Content (%) | Primary Function | | :--- | :--- | :--- | | **Nickel (Ni)** | 18.0 - 22.0 | Stabilizes the austenitic matrix, provides fundamental corrosion resistance, improves toughness. | | **Chromium (Cr)** | 2.0 - 3.0 | Enhances resistance to oxidation, scaling, and pitting corrosion; strengthens the matrix. | | **Copper (Cu)** | 0.5 - 1.5 | Improves corrosion resistance in sulfuric acid and seawater; aids in matrix stabilization. | | **Silicon (Si)** | 1.0 - 2.0 | Promotes graphitization, improves castability, and enhances oxidation resistance. | | **Carbon (C)** | 3.0 - 3.5 | Ensures graphite formation for machinability, damping, and thermal conductivity. | | **Manganese (Mn)** | 0.5 - 1.5 | Counteracts sulfur, aids in deoxidation. | | **Phosphorus (P)** | ≤ 0.08 | Low level to maintain toughness and corrosion resistance. | | **Sulfur (S)** | ≤ 0.12 | Controlled to prevent embrittlement. | | **Iron (Fe)** | Balance | Base metal. | *Note: Various grades exist with compositional adjustments to target specific corrosion types (e.g., high-silicon versions for severe acid service).* --- ### **2. Physical & Mechanical Properties** Ni-Resist exhibits a distinct set of properties derived from its austenitic structure. | Property | Typical Value / Description | | :--- | :--- | | **Microstructure** | Austenitic matrix with flake graphite (Type A distribution is preferred). | | **Density** | ~7.1 g/cm³ (Slightly lower than plain gray iron). | | **Tensile Strength** | 170 - 240 MPa (24 - 35 ksi) | | **Yield Strength (0.2% Offset)** | 140 - 190 MPa (20 - 28 ksi) | | **Elongation** | 1 - 2% (Limited, but higher than standard gray iron) | | **Hardness** | 140 - 250 HB | | **Thermal Expansion** | High (~18 x 10⁻⁶/°C), similar to austenitic stainless steel. | | **Magnetic Properties** | Essentially non-magnetic (austenitic). | | **Machinability** | Good to excellent (similar to or better than standard gray iron). | | **Damping Capacity** | Excellent, inheriting the good damping characteristics of gray iron. | --- ### **3. Key Product Advantages & Characteristics** * **Superior Corrosion Resistance:** Outstanding resistance to seawater, alkaline solutions, dilute sulfuric, acetic, and phosphoric acids, and many organic compounds. Highly resistant to **graphitization** (selective leaching of iron), a common failure mode for plain cast iron in wet environments. * **Heat & Oxidation Resistance:** Performs well in intermittent service up to ~800°C (1470°F), resisting scaling and growth. * **Non-Magnetic:** Ideal for applications requiring minimal magnetic permeability. * **Dimensional Stability:** Maintains size and shape under thermal cycling due to the stable austenitic structure. * **Casting Performance:** Excellent fluidity and castability, allowing for the production of complex, thin-walled components. --- ### **4. Product Applications** Ni-Resist is specified across industries where corrosion is a primary concern: * **Marine & Offshore:** Pump bodies, valve casings, seawater piping, fittings, stern tubes, desalination components. * **Chemical Processing:** Mixing tanks, reactor parts, acid pumps, valve bodies, pipe fittings, and equipment handling corrosive chemicals. * **Power Generation:** FGD (Flue Gas Desulfurization) system components, scrubber parts, condenser covers. * **Food & Pharmaceutical:** Equipment requiring frequent cleaning with aggressive sanitizers (e.g., caustic solutions). * **Automotive & Transportation:** Turbocharger housings, exhaust manifolds (for certain diesel engines), brake components in corrosive environments. * **General Engineering:** Any application where standard cast iron fails due to corrosion or oxidation. --- ### **5. International Standards** High-Nickel Gray Irons are covered by well-established international standards, ensuring consistent quality and performance. The most common standards include: | Standard | Title / Scope | Common Grades | | :--- | :--- | :--- | | **ASTM A436** | *Standard Specification for Austenitic Gray Iron Castings* | **Type 1, Type 1b (D-2S), Type 2, etc.** This is the primary ASTM standard. | | **ISO 2892** | *Austenitic cast irons* | **JLW/CR/A2Ni20Cr2** (similar to ASTM Type 1b). Provides a global designation system. | | **EN 13835** | *Founding - Austenitic cast irons* (European Standard) | **EN-GJLA-XNiCuCr15-6-2** (Example designation). Replaces older national standards like BS 3468. | | **DIN EN 13835** | German adoption of EN 13835. | Same as EN 13835. | | **JIS G5510** | *Austenitic cast irons* (Japanese Standard) | **FCA-Ni20Cr2** | **Note:** When specifying material, it is crucial to indicate both the standard and the grade (e.g., ASTM A436, Type 1b) to ensure the correct chemistry and properties are supplied. --- ### **Conclusion** High-Nickel Gray Iron (Ni-Resist) is a versatile and proven engineering material that bridges the gap between standard cast iron and high-nickel alloys. Its optimal blend of **castability, machinability, mechanical strength, and exceptional corrosion/heat resistance** makes it a first-choice material for designers and engineers tackling durability challenges in harsh operating conditions. When sourced to established international standards like ASTM A436 or ISO 2892, it provides a reliable and cost-effective solution for long-term performance. -:- For detailed product information, please contact sales. -: High-Nickel Gray Iron, corrosion resistant Specification Dimensions Size： Diameter 20-1000 mm Length <6479 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. -: High-Nickel Gray Iron, corrosion resistant Properties -:- For detailed product information, please contact sales. -:

Applications of High-Nickel Gray Iron Flange, corrosion resistant -:- For detailed product information, please contact sales. -: Chemical Identifiers High-Nickel Gray Iron Flange, corrosion resistant -:- For detailed product information, please contact sales. -:

Packing of High-Nickel Gray Iron Flange, corrosion resistant -:- 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 2950 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