ASTM A553 Alloy Steel Flange, Grade I

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 A553 Alloy Steel Flange, Grade I Product Information -:- For detailed product information, please contact sales. -: ASTM A553 Alloy Steel Flange, Grade I Synonyms -:- For detailed product information, please contact sales. -:

ASTM A553 Alloy Steel, Grade I Product Information -:- For detailed product information, please contact sales. -: ### **ASTM A553 Grade I: High-Strength Quenched and Tempered Alloy Steel Plate** #### **1. Overview** ASTM A553 Grade I is a **high-strength quenched and tempered alloy steel plate** specifically designed for **pressure vessel applications** requiring excellent notch toughness at cryogenic temperatures. This specification covers 8% and 9% nickel steel plates primarily used for **cryogenic service** where temperatures can reach as low as -320°F (-196°C). Grade I represents the standard strength level within this specification, providing an optimal balance of strength, toughness, and fabricability for liquefied gas storage and handling equipment. #### **2. Chemical Composition** The chemical composition is carefully controlled for cryogenic performance: | Element | Composition (%) | |---------|-----------------| | Carbon (C) | 0.13 max | | Manganese (Mn) | 0.90 max | | Phosphorus (P) | 0.035 max | | Sulfur (S) | 0.035 max | | Silicon (Si) | 0.15 - 0.40 | | Nickel (Ni) | 8.00 - 9.00 | | Chromium (Cr) | 0.25 max | | Molybdenum (Mo) | 0.12 max | **Key Composition Features:** - **High Nickel Content (8.00-9.00%)**: Provides exceptional toughness at cryogenic temperatures - **Low Carbon Content**: Ensures excellent weldability and notch toughness - **Controlled Manganese**: Optimizes strength and toughness balance - **Low Residual Elements**: Minimizes impairment of cryogenic properties #### **3. Physical & Mechanical Properties** **Mechanical Properties (Quenched & Tempered Condition):** | Property | Requirement | |----------|-------------| | **Tensile Strength** | 100 - 120 ksi (690 - 830 MPa) | | **Yield Strength** | 75 ksi min (515 MPa min) | | **Elongation in 2 inches** | 20% min | | **Charpy V-Notch Impact** | 25 ft-lb min at -320°F (-196°C) | **Exceptional Cryogenic Performance:** - **Outstanding Low-Temperature Toughness**: Maintains excellent impact properties at liquid nitrogen temperatures - **Stable Microstructure**: Retains austenitic characteristics at cryogenic conditions - **Good Fatigue Resistance**: Suitable for cyclic loading in cryogenic service - **Excellent Fracture Toughness**: Superior resistance to brittle fracture **Physical Properties (Typical):** - **Density**: 0.287 lb/in³ (7,950 kg/m³) - **Modulus of Elasticity**: 28,500 ksi (197 GPa) at room temperature - **Thermal Expansion Coefficient**: 5.8 × 10⁻⁶/°F (10.4 × 10⁻⁶/°C) at -320°F to 68°F - **Thermal Conductivity**: 12.5 W/m·K at -320°F (-196°C) - **Magnetic Permeability**: Typically less than 1.05 at cryogenic temperatures #### **4. Product Applications** Grade I is specifically designed for cryogenic applications: **Liquefied Gas Storage:** - LNG (Liquefied Natural Gas) storage tanks - Liquid nitrogen and oxygen containers - Liquid argon storage vessels - Cryogenic liquid transport tanks **Industrial and Process:** - Cryogenic process vessels - Low-temperature heat exchangers - Industrial gas production equipment - Superconducting system components **Energy and Research:** - Cryogenic energy storage systems - Research laboratory equipment - Space simulation chambers - Advanced scientific instruments #### **5. International Standards & Equivalents** | Region/Country | Standard | Equivalent Grade | Notes | |----------------|----------|------------------|-------| | **International** | **ISO 9328-4** | X8Ni9 | Similar 9% nickel steel | | **Europe** | **EN 10028-4** | X8Ni9 | Cryogenic nickel steel | | **Japan** | **JIS G3127** | SL9N590 | 9% nickel steel equivalent | | **Germany** | **DIN 17280** | X8Ni9 | Cryogenic application steel | **Grade Comparison within A553:** | Parameter | Grade I | Grade II | |-----------|---------|----------| | **Nickel Content** | 8.00-9.00% | 8.50-9.50% | | **Yield Strength Minimum** | 75 ksi | 85 ksi | | **Tensile Strength Range** | 100-120 ksi | 110-130 ksi | | **Primary Applications** | Standard Cryogenic | Enhanced Cryogenic | #### **6. Fabrication & Quality Assurance** **Welding and Fabrication:** - **Pre-heat requirement**: Generally not required due to low carbon content - **Post-weld heat treatment**: Optional, typically not specified - **Welding consumables**: Nickel-based electrodes recommended - **Welding processes**: All standard processes applicable with proper procedures **Heat Treatment:** - **Double Normalizing and Tempering**: Standard heat treatment - **Normalizing temperature**: 1475-1525°F (802-829°C) - **Tempering temperature**: 1050-1150°F (566-621°C) - **Quenching**: Water quenching may be specified for enhanced properties **Quality Control Requirements:** - **Impact testing**: Mandatory at -320°F (-196°C) - **Tension tests**: From each heat treatment charge - **Ultrasonic examination**: Typically required for pressure vessel applications - **Hardness testing**: Usually 200-240 HBW --- **Technical Advantages:** - **Excellent toughness** at cryogenic temperatures down to -320°F (-196°C) - **Good weldability** without pre-heat requirements - **High strength-to-weight ratio** - **Proven reliability** in cryogenic service **Design Considerations:** - **ASME Section VIII** design rules applicable - **Cryogenic service** capability to -320°F (-196°C) - **Fracture mechanics analysis** recommended for critical applications - **Thermal stress analysis** essential for design **Service Limitations:** - **Minimum design temperature**: -320°F (-196°C) - **Maximum service temperature**: 500°F (260°C) - **Corrosion resistance**: Limited in aggressive environments - **Fabrication control**: Proper procedures essential for maintaining cryogenic properties **Disclaimer:** This technical information is for reference purposes only. For cryogenic pressure vessel applications, consult the latest ASTM A553 specification and applicable ASME Code requirements. Material selection and fabrication must be approved by qualified engineers experienced in cryogenic applications and must comply with all relevant regulatory standards and quality assurance protocols. -:- For detailed product information, please contact sales. -: ASTM A553 Alloy Steel, Grade I Specification Dimensions Size： Diameter 20-1000 mm Length <4460 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 A553 Alloy Steel, Grade I Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A553 Alloy Steel Flange, Grade I -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A553 Alloy Steel Flange, Grade I -:- For detailed product information, please contact sales. -:

Packing of ASTM A553 Alloy Steel Flange, Grade I -:- 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 931 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