ASTM A517 Low Alloy Steel Flange, Grade J

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 A517 Low Alloy Steel Flange, Grade J Product Information -:- For detailed product information, please contact sales. -: ASTM A517 Low Alloy Steel Flange, Grade J Synonyms -:- For detailed product information, please contact sales. -:

ASTM A517 Low Alloy Steel, Grade J Product Information -:- For detailed product information, please contact sales. -: ### **ASTM A517 Grade J: High-Strength Quenched and Tempered Alloy Steel** #### **1. Overview** ASTM A517 is a standard specification for high-strength, quenched and tempered alloy steel plates used in demanding applications such as pressure vessels, bridges, and other structural components. **Grade J** is a specific grade within this family, distinguished by its unique chemical composition that provides an excellent combination of ultra-high strength, good toughness, and **enhanced atmospheric corrosion resistance**. This combination makes it particularly suitable for applications where both high mechanical strength and longevity in exposed environments are required. #### **2. Chemical Composition** The chemical composition for ASTM A517 Grade J is carefully balanced to achieve high hardenability and its characteristic corrosion resistance. A key differentiator is the inclusion of Copper and Chromium, which contribute to its weathering properties. The following table outlines the required percentages (by heat analysis): | Element | Composition (%) | | :--- | :--- | | Carbon (C) | 0.15 - 0.21 | | Manganese (Mn) | 0.95 - 1.30 | | Phosphorus (P) | 0.035 max | | Sulfur (S) | 0.035 max | | Silicon (Si) | 0.15 - 0.35 | | Nickel (Ni) | 0.70 - 1.00 | | Chromium (Cr) | 0.40 - 0.65 | | Molybdenum (Mo) | 0.18 - 0.28 | | Boron (B) | 0.0015 - 0.0050 | | Vanadium (V) | 0.03 - 0.08 | | **Copper (Cu)** | **0.20 - 0.35** | **Key Alloying Roles:** * **Carbon & Manganese:** Provide base strength and hardenability. * **Nickel, Chromium, Molybdenum:** These elements work synergistically to increase hardenability, strength, and toughness. Chromium also enhances corrosion resistance. * **Copper:** A key element that, along with Chromium, Phosphorus, and Nickel, promotes the formation of a dense, adherent rust patina that retards further atmospheric corrosion. This is the defining feature of Grade J. * **Boron:** A powerful hardenability intensifier. * **Vanadium:** Contributes to grain refinement and secondary hardening. #### **3. Physical & Mechanical Properties** ASTM A517 Grade J is supplied in the quenched and tempered condition. The following mechanical properties are typically required for plates up to 2.5 inches (63.5 mm) in thickness: | Property | Requirement | | :--- | :--- | | **Tensile Strength** | 115 - 135 ksi (790 - 930 MPa) | | **Yield Strength (min)** | 100 ksi (690 MPa) | | **Elongation in 2-in (50 mm) (min)** | 16% | | **Reduction of Area (min)** | 50% | | **Hardness (Brinell)** | Typically 235 - 293 HBW | **Impact Toughness:** * **Charpy V-Notch (CVN) Impact Test:** Required at **-50°F (-46°C)**. * **Minimum Average Value:** 15 ft-lb (20 J) for longitudinal specimens. **Physical Properties (Typical Values):** * **Density:** 0.284 lb/in³ (7850 kg/m³) * **Modulus of Elasticity:** 29,000 ksi (200 GPa) * **Poisson's Ratio:** 0.29 * **Coefficient of Thermal Expansion:** ~6.5 x 10^-6/°F (11.7 x 10^-6/°C) #### **4. Product Applications** The combination of high strength and improved atmospheric corrosion resistance makes ASTM A517 Grade J ideal for applications where structural components are exposed to the elements, and where the weight savings of high-strength steel are critical. * **Pressure Vessels for Corrosive Environments:** Storage tanks and vessels in coastal or industrial atmospheres. * **Construction & Mining Equipment:** Structural booms, frames, and platforms for cranes and excavators that operate outdoors, reducing the need for frequent painting and maintenance. * **Unpainted Structural Applications:** In bridges, transmission towers, and building frames where a weathering steel appearance is acceptable or desired. * **Transportation:** Frame members and trailers for heavy-duty vehicles exposed to road salts and weather. * **Wind Turbine Towers:** Where high strength reduces material usage for the tall tower sections, and corrosion resistance is beneficial. #### **5. International Standards & Equivalents** ASTM A517 Grade J is a unique grade due to its corrosion-resistant properties. While other standards have high-strength and weathering steel grades, a direct, single-equivalent grade is less common. | Standard | Equivalent / Similar Grade | Key Differences / Notes | | :--- | :--- | :--- | | **ASTM A517** | **Grade J** | The base specification. | | **ASTM A871** | **Grade 65** | This is a specification for high-strength, corrosion-resistant steel plates. The chemistry and intent are very similar, making it a close functional relative. | | **EN 10025-5** | **S690Q** | A European high-strength steel. **This is not a weathering steel.** For corrosion resistance, one would need to look at grades like S355J2W per EN 10025-5, but these have much lower strength. | | **ASTM A588** | **Grade A/K** | A well-known weathering steel specification, but with a typical yield strength of 50 ksi (345 MPa), which is significantly lower than A517 Grade J. | **Important Note on Fabrication:** Fabricating ASTM A517 Grade J requires the same stringent controls as other A517 grades, with additional consideration for its copper content. * **Welding:** Requires strict procedures including **pre-heating**, use of **low-hydrogen electrodes**, and often **Post-Weld Heat Treatment (PWHT)** to avoid hydrogen-induced cracking. * **Copper Caution:** While copper adds corrosion resistance, it can promote surface hot shortness during thermal cutting or welding if not properly controlled. Proper practices must be followed to avoid this issue. --- **Disclaimer:** This information is for reference purposes only. For critical design and fabrication, the latest version of the official **ASTM A517** standard and consultation with qualified materials engineers are essential. -:- For detailed product information, please contact sales. -: ASTM A517 Low Alloy Steel, Grade J Specification Dimensions Size： Diameter 20-1000 mm Length <4413 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 A517 Low Alloy Steel, Grade J Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A517 Low Alloy Steel Flange, Grade J -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A517 Low Alloy Steel Flange, Grade J -:- For detailed product information, please contact sales. -:

Packing of ASTM A517 Low Alloy Steel Flange, Grade J -:- 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 884 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