AISI 8822 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. -: AISI 8822 Steel Flange, normalized Product Information -:- For detailed product information, please contact sales. -: AISI 8822 Steel Flange, normalized Synonyms -:- For detailed product information, please contact sales. -:

AISI 8822 Steel, normalized Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: AISI 8822 Steel, Normalized Condition** #### **1. Overview** AISI 8822 is a **nickel-chromium-molybdenum (Ni-Cr-Mo) alloy steel** belonging to the 8800 series, distinguished by its **elevated nickel content** compared to the 8600 series grades. In the **normalized** condition—achieved by heating to approximately 900-925°C (1650-1700°F) followed by uniform air cooling—this material exhibits a **refined, homogeneous ferritic-pearlitic microstructure**. This thermal treatment enhances mechanical uniformity, improves dimensional stability, and provides an optimal foundation for machining and subsequent heat treatment. The higher nickel content (nominally 0.50-0.80%) imparts **superior core toughness and hardenability**, making normalized AISI 8822 a premium stock material for components requiring exceptional impact resistance and reliability in demanding service environments. #### **2. International Standards & Designations** AISI 8822 in normalized condition is recognized under various international standards. | Region/System | Standard Designation | Title / Purpose | | :--- | :--- | :--- | | **USA (AISI/SAE)** | **AISI 8822, SAE J404** | Standard Chemical Composition | | **USA (ASTM)** | **ASTM A322** | Standard Specification for Steel Bars, Alloy, Standard Grades | | **UNS Number** | **G88220** | Unified Numbering System | | **Heat Treatment Reference** | **SAE AMS-H-6875** | Heat Treatment of Steel, General Requirements | | **Europe (EN)** | **1.6524 / 22NiCrMoS2-2** | Equivalent Material Standard (Note: European grades often have slightly different S ranges) | | **Germany (DIN/W-Nr.)** | **22NiCrMoS2-2 / 1.6524** | Equivalent Designation | | **Japan (JIS)** | **SNCM420** (Close Equivalent) | Similar Material Standard | #### **3. Chemical Composition** The composition is characterized by a balanced carbon content and significantly higher nickel levels than comparable 8620-series steels. | Element | Content (% by Weight) | Metallurgical Role in Normalized State | | :--- | :--- | :--- | | **Carbon (C)** | 0.20 - 0.25 | Provides base strength; forms fine, uniformly distributed pearlite during air cooling. | | **Manganese (Mn)** | 0.75 - 1.00 | Enhances hardenability; refines pearlitic structure. | | **Phosphorus (P)** | ≤ 0.035 | Impurity control. | | **Sulfur (S)** | ≤ 0.040 | Impurity control; may be at upper limit for improved machinability. | | **Silicon (Si)** | 0.15 - 0.35 | Deoxidizer; strengthens ferrite matrix. | | **Nickel (Ni)** | **0.50 - 0.80** | **Key Differentiator:** Significantly enhances toughness and hardenability; lowers ductile-to-brittle transition temperature; promotes fine, uniform microstructure. | | **Chromium (Cr)** | 0.40 - 0.60 | Increases hardenability; contributes to fine carbide distribution. | | **Molybdenum (Mo)** | 0.20 - 0.30 | Inhibits grain growth during high-temperature exposure; improves hardenability and tempering response. | | **Iron (Fe)** | Balance | Base metal. | #### **4. Mechanical & Physical Properties (Normalized Condition)** Normalization produces consistent, enhanced properties ideal for intermediate manufacturing stages. **Typical As-Normalized Properties:** * **Hardness:** **187 - 229 HB** (Brinell) or **89 - 97 HRB** (Rockwell B). Slightly higher than normalized 8620 due to higher alloy content. * **Ultimate Tensile Strength (UTS):** **620 - 800 MPa** (90 - 116 ksi) * **Yield Strength (0.2% Offset):** **430 - 620 MPa** (62 - 90 ksi) * **Elongation in 2 inches:** **18% - 22%** * **Reduction of Area:** **45% - 55%** * **Charpy V-Notch Impact Toughness (20°C):** **60 - 90 J** (44 - 66 ft-lbf) – **Notably higher than 8620 series due to increased nickel.** * **Machinability Rating:** **~55%** of B1112 steel. Good chip control with consistent tool wear. * **Microstructure:** Fine, homogeneous mixture of pearlite and ferrite with ASTM grain size typically 7-8. **Physical Properties:** * **Density:** 7.85 g/cm³ (0.284 lb/in³) * **Modulus of Elasticity:** 205 GPa (29,700 ksi) * **Poisson's Ratio:** 0.29 * **Thermal Conductivity:** ~46 W/m·K (at 100°C) * **Coefficient of Thermal Expansion:** 12.2 x 10⁻⁶/°C (20-100°C) #### **5. Product Applications** Normalized AISI 8822 is specified for high-integrity components where superior toughness and reliability are required, often in demanding environments. * **Critical Gearing Preforms:** Blanks for heavy-duty transmission gears, mining equipment gears, and wind turbine gear components where impact resistance is paramount. * **High-Stress Shafting:** Camshafts, crankshafts, and drive shafts for performance automotive, heavy truck, and off-highway applications. * **Oil & Gas Equipment:** Components for drilling tools, valves, and pumps operating in low-temperature or high-shock environments. * **Aerospace & Defense Components:** Structural parts, landing gear components, and actuator parts requiring high toughness-to-strength ratio. * **Heavy Machinery:** Pins, bushings, and linkages in construction and mining equipment subject to impact loading. * **Tooling & Fixtures:** Dies, jigs, and fixtures requiring high strength and excellent toughness. #### **6. Key Characteristics & Advantages (as Normalized Stock)** * **Exceptional Toughness:** The **primary advantage** derived from higher nickel content. Provides superior resistance to impact and shock loading compared to 8620-series steels in the same condition. * **Enhanced Hardenability:** Higher alloy content ensures deeper and more uniform hardening during subsequent quenching operations, suitable for larger section sizes. * **Excellent Low-Temperature Properties:** Maintains good ductility and impact strength at sub-zero temperatures, making it suitable for arctic or cryogenic service applications. * **Superior Microstructural Uniformity:** Normalization produces a fine, homogeneous structure free from banding, ensuring consistent mechanical properties in all directions. * **Good Dimensional Stability:** The stress-relieving effect of normalization minimizes distortion during subsequent machining and heat treatment. * **Optimized for Severe Service:** The combination of strength and toughness makes it an ideal precursor for components that will undergo carburizing and serve in high-stress, high-reliability applications. **Conclusion:** **AISI 8822 in the normalized condition represents a premium-grade engineering steel for applications demanding exceptional toughness and reliability.** Its higher nickel content elevates it above standard 8620-series steels, providing **significantly improved impact resistance and low-temperature performance** while maintaining good strength and machinability. This material is particularly valuable for components operating in demanding environments—such as mining, heavy transportation, energy, and defense—where failure from impact or shock loading is a critical concern. By starting with normalized AISI 8822 stock, manufacturers gain a material with **inherently better toughness characteristics**, providing an additional safety margin and performance advantage in the final heat-treated component. For engineers designing critical systems where material performance cannot be compromised, normalized AISI 8822 offers a robust and reliable foundation for manufacturing high-integrity components. -:- For detailed product information, please contact sales. -: AISI 8822 Steel, normalized Specification Dimensions Size： Diameter 20-1000 mm Length <5749 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. -: AISI 8822 Steel, normalized Properties -:- For detailed product information, please contact sales. -:

Applications of AISI 8822 Steel Flange, normalized -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI 8822 Steel Flange, normalized -:- For detailed product information, please contact sales. -:

Packing of AISI 8822 Steel Flange, normalized -:- 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 2220 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