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

AISI 8822H Steel, normalized Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: AISI 8822H Steel, Normalized Condition** #### **1. Overview** AISI 8822H is a **hardenability-controlled (H-grade) nickel-chromium-molybdenum (Ni-Cr-Mo) alloy steel** belonging to the premium 8800 series, characterized by its **elevated nickel content**. Supplied in the **normalized condition**—heated to approximately 900-925°C (1650-1700°F) and uniformly air-cooled—this material represents a high-grade, pre-conditioned stock engineered for maximum consistency and reliability. The "H" designation guarantees that the steel's transformation characteristics fall within a narrow, specified band as verified by end-quench (Jominy) testing, ensuring **exceptional batch-to-batch uniformity** in final core properties after carburizing. Combined with the inherent **superior toughness and hardenability** imparted by higher nickel levels, normalized AISI 8822H provides an optimal foundation for manufacturing critical components where performance predictability, impact resistance, and dimensional stability are paramount. #### **2. International Standards & Designations** This material condition conforms to international standards governing both composition and guaranteed hardenability. | Region/System | Standard Designation | Title / Purpose | | :--- | :--- | :--- | | **USA (AISI/SAE)** | **AISI 8822H, SAE J404 & SAE J1268** | Chemical Composition & Hardenability Bands | | **USA (ASTM)** | **ASTM A304** | Standard Specification for Steel Bars Subject to End-Quench Hardenability Requirements | | **Heat Treatment Reference** | **SAE AMS-H-6875** | Heat Treatment of Steel, General Requirements | | **UNS Number** | **H88220** | Unified Numbering System for H-Steels | | **Europe (EN)** | **1.6524H / 22NiCrMoS2-2H** | Hardenability-controlled Equivalent | | **Quality Assurance** | **AMS 2300** | Premium Aircraft-Quality Steel Cleanliness (Optional) | #### **3. Chemical Composition & Hardenability Guarantee** The composition is tightly controlled, with elevated nickel as the key differentiator, and the entire chemistry optimized to meet precise H-band specifications. **Core Composition (% by Weight, AISI 8822H):** | Element | Content Range | Metallurgical Significance | | :--- | :--- | :--- | | **Carbon (C)** | 0.19 - 0.25 | Provides base strength; tightly controlled for H-band consistency. | | **Manganese (Mn)** | 0.75 - 1.00 | Enhances hardenability; range adjusted for predictable Jominy curve. | | **Phosphorus (P)** | ≤ 0.025 | Reduced impurity level for improved ductility. | | **Sulfur (S)** | ≤ 0.025 | Controlled impurity level for optimal balance of machinability and properties. | | **Silicon (Si)** | 0.15 - 0.35 | Deoxidizer; solid solution strengthener. | | **Nickel (Ni)** | **0.50 - 0.80** | **Primary Differentiator:** Significantly enhances core toughness and hardenability; content stabilized for exceptional consistency. | | **Chromium (Cr)** | 0.40 - 0.65 | Increases hardenability; promotes wear-resistant carbides. | | **Molybdenum (Mo)** | 0.20 - 0.30 | Strong hardenability element; suppresses temper embrittlement. | **Key Feature: Guaranteed Hardenability Band** The material is supplied with certified Jominy end-quench test results guaranteed to fall within a specified narrow hardness band. This ensures **predictable and uniform core hardness and microstructure** after final heat treatment, with minimal lot-to-lot variation—a critical advantage for high-reliability manufacturing. #### **4. Mechanical & Physical Properties (Normalized Condition)** Normalization produces a fine, homogeneous ferritic-pearlitic structure with enhanced and consistent properties. **Typical As-Normalized Properties:** * **Hardness:** **187 - 229 HB** (Brinell) or **89 - 97 HRB**. Provides excellent machinability with superior consistency. * **Ultimate Tensile Strength (UTS):** **620 - 800 MPa** (90 - 116 ksi) * **Yield Strength (0.2% Offset):** **430 - 620 MPa** (62 - 90 ksi) * **Elongation:** **18% - 22%** * **Reduction of Area:** **45% - 55%** * **Charpy V-Notch Impact Toughness (20°C):** **70 - 100 J** (52 - 74 ft-lbf) – **Exceptional due to high nickel content.** * **Charpy V-Notch Impact Toughness (-40°C):** **40 - 70 J** (30 - 52 ft-lbf) * **Machinability Rating:** **~55%** of B1112 steel. Offers predictable tool wear and excellent surface finish. * **Microstructure:** Fine, uniform distribution of pearlite in a ferrite matrix; ASTM grain size 7-8. **Physical Properties:** * **Density:** **7.85 g/cm³** * **Modulus of Elasticity:** **205 GPa** * **Poisson's Ratio:** **0.29** * **Thermal Conductivity:** **~45 W/m·K** at 100°C * **Coefficient of Thermal Expansion:** **12.2 × 10⁻⁶/°C** (20-100°C) #### **5. Product Applications** Normalized AISI 8822H is specified for the most demanding applications where guaranteed material consistency, superior toughness, and high reliability are non-negotiable. * **Aerospace Critical Components:** Landing gear parts, actuator components, and transmission gears where material consistency is certified. * **High-Performance Automotive:** Racing transmission gears, high-stress drivetrain components, and critical fasteners. * **Oil & Gas Drilling Equipment:** Heavy-duty downhole tools, blowout preventer components, and valve parts for extreme environments. * **Energy Sector:** Gears and shafts for wind turbine gearboxes, critical pump components, and compressor parts. * **Defense Applications:** Tank transmission components, weapon system parts, and armored vehicle drive train elements. * **Heavy Industrial Machinery:** Critical gears for mining excavators, large crushers, and draglines where failure is catastrophic. #### **6. Key Characteristics & Advantages** * **Guaranteed Core Consistency:** The **primary H-grade advantage** ensures uniform core properties after heat treatment, eliminating batch-to-batch performance variation. * **Exceptional Impact Toughness:** The high nickel content provides superior resistance to shock and impact loading, significantly outperforming 8620H-series steels. * **Superior Low-Temperature Performance:** Maintains excellent ductility and toughness at temperatures as low as -40°C to -60°C. * **Enhanced Hardenability:** The combined effect of higher alloy content and H-grade control allows through-hardening of large, complex sections with predictable results. * **Optimal Manufacturing Foundation:** The normalized condition provides exceptional dimensional stability and uniform machinability, reducing distortion during subsequent processing. * **High Reliability:** The combination of H-grade consistency and superior intrinsic properties makes this material ideal for applications with severe safety or economic consequences of failure. * **Reduced Quality Assurance Costs:** The certified hardenability band minimizes the need for extensive destructive testing of finished components. **Process Considerations:** * **Normalization Integrity:** Requires precise temperature control and uniform cooling to achieve specified microstructure. * **Machining Optimization:** Benefits from rigid tooling and appropriate cutting parameters due to higher strength. * **Subsequent Heat Treatment:** Provides an ideal, consistent starting condition for carburizing, carbonitriding, or through-hardening processes. **Conclusion:** **AISI 8822H in the normalized condition represents the pinnacle of pre-conditioned alloy steel stock for high-reliability applications.** It successfully combines the **inherent toughness and hardenability advantages of high-nickel steel** with the **production certainty of H-grade certification**. This material is not merely a commodity but a **comprehensive engineering solution** that addresses the critical needs of advanced manufacturing: predictability, performance, and risk mitigation. For industries where component failure carries unacceptable consequences—aerospace, defense, energy, and high-performance transportation—normalized AISI 8822H provides the material assurance needed to achieve design margins with confidence. By offering both superior intrinsic properties and guaranteed consistency, this material enables manufacturers to produce components that deliver identical performance characteristics across all production batches, making it an essential choice for the most demanding engineering applications where quality and reliability cannot be compromised. -:- For detailed product information, please contact sales. -: AISI 8822H Steel, normalized Specification Dimensions Size： Diameter 20-1000 mm Length <5750 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 8822H Steel, normalized Properties -:- For detailed product information, please contact sales. -:

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

Packing of AISI 8822H 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 2221 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