ASTM A533 Low Alloy Steel Flange, Grade A, Class 1

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. -: ASTM A533 Low Alloy Steel Flange, Grade A, Class 1 Product Information -:- For detailed product information, please contact sales. -: ASTM A533 Low Alloy Steel Flange, Grade A, Class 1 Synonyms -:- For detailed product information, please contact sales. -:

ASTM A533 Low Alloy Steel, Grade A, Class 1 Product Information -:- For detailed product information, please contact sales. -: ### **ASTM A533 Grade A Class 1: High-Strength Quenched and Tempered Alloy Steel Plate** #### **1. Overview** ASTM A533 is a standard specification for **pressure vessel plates**, alloy steel, quenched and tempered. **Grade A, Class 1** is a specific category within this specification, designed to provide exceptional **strength and toughness** for critical applications, particularly in nuclear and heavy-wall pressure vessels. This steel undergoes rigorous heat treatment (quenching and tempering) to achieve a fine-grained microstructure that delivers superior mechanical properties and reliable performance in demanding service environments. #### **2. Chemical Composition** The chemical composition is carefully balanced to achieve high hardenability and excellent toughness in thick sections. | Element | Composition (%) | |---------|-----------------| | Carbon (C) | 0.25 max | | Manganese (Mn) | 0.95 - 1.30 | | Phosphorus (P) | 0.035 max | | Sulfur (S) | 0.035 max | | Silicon (Si) | 0.15 - 0.40 | | Nickel (Ni) | 0.70 - 1.00 | | Molybdenum (Mo) | 0.45 - 0.60 | | Copper (Cu) | 0.25 max (when specified) | **Key Alloying Roles:** - **Nickel-Molybdenum Combination:** Provides deep hardenability and enhances toughness - **Controlled Carbon:** Balances strength and weldability - **Manganese:** Increases hardenability and strength - **Low Impurities:** Restricted phosphorus and sulfur improve toughness #### **3. Physical & Mechanical Properties** **Mechanical Properties (Up to 2½ inches / 63 mm thickness):** | Property | Requirement | |----------|-------------| | **Tensile Strength** | 80 - 100 ksi (550 - 690 MPa) | | **Yield Strength** | 50 ksi min (345 MPa min) | | **Elongation in 2 inches** | 18% min | | **Reduction of Area** | 45% min | | **Charpy V-Notch Impact** | 40 ft-lb min at -75°F (-60°C) | **Physical Properties (Typical):** - **Density:** 0.284 lb/in³ (7,850 kg/m³) - **Modulus of Elasticity:** 29,000 ksi (200 GPa) - **Poisson's Ratio:** 0.29 - **Thermal Expansion Coefficient:** 6.5 × 10⁻⁶/°F (11.7 × 10⁻⁶/°C) #### **4. Product Applications** ASTM A533 Grade A Class 1 is primarily used in critical applications requiring exceptional reliability: **Nuclear Power Industry:** - Reactor pressure vessels - Nuclear containment structures - Steam generators and pressurizers - Primary coolant system components **Pressure Vessel Applications:** - Heavy-wall chemical reactors - High-pressure storage vessels - Hydrocracking units in refineries - Large-diameter high-pressure piping **Specialized Equipment:** - Heavy construction machinery - Mining equipment components - Research and test facilities #### **5. International Standards & Equivalents** | Region/Country | Standard | Equivalent Grade | Notes | |----------------|----------|------------------|-------| | **International** | **ISO 9328-2** | 13MnNiMo5-4 | Similar chemistry and properties | | **Europe** | **EN 10028-2** | 13MnNiMo5-4 | Close equivalent for pressure vessels | | **Japan** | **JIS G3120** | SOV 2A | Similar application scope | | **Germany** | **DIN 17155** | 13MnNiMo54 | Historical equivalent | **Key International Comparisons:** - **European EN 10028-2:** 13MnNiMo5-4 offers similar strength and toughness - **Japanese JIS G3120:** SOV series provides comparable nuclear applications - **Chinese GB/T 30062:** Similar alloy steel plates for pressure vessels #### **6. Fabrication & Welding Considerations** **Heat Treatment:** - Supplied in quenched and tempered condition - Post-weld heat treatment typically required - Maximum tempering temperature: 1150°F (621°C) **Welding Requirements:** - Low-hydrogen welding processes mandatory - Pre-heat and interpass temperature control critical - Post-weld heat treatment essential for stress relief - Welding procedures must be qualified per ASME Section IX **Quality Assurance:** - Strict non-destructive testing requirements - Ultrasonic examination per ASTM A578 - Impact testing at specified temperatures - Chemical analysis and mechanical testing for each heat --- **Special Notes:** - **Nuclear Certification:** Often supplied with supplementary requirements for nuclear applications - **Traceability:** Complete material traceability required for critical applications - **Quality Documentation:** Certified Material Test Reports (CMTR) with full traceability **Disclaimer:** This information is for reference purposes only. For nuclear and other critical applications, consult the latest ASTM A533 standard and applicable nuclear codes (ASME Section III). Material selection should be made in consultation with qualified materials engineers. -:- For detailed product information, please contact sales. -: ASTM A533 Low Alloy Steel, Grade A, Class 1 Specification Dimensions Size： Diameter 20-1000 mm Length <4423 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. -: ASTM A533 Low Alloy Steel, Grade A, Class 1 Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A533 Low Alloy Steel Flange, Grade A, Class 1 -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A533 Low Alloy Steel Flange, Grade A, Class 1 -:- For detailed product information, please contact sales. -:

Packing of ASTM A533 Low Alloy Steel Flange, Grade A, Class 1 -:- 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 894 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