NUCu Steel Flange - ASTM A710 Grade B

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. -: NUCu Steel Flange - ASTM A710 Grade B Product Information -:- For detailed product information, please contact sales. -: NUCu Steel Flange - ASTM A710 Grade B Synonyms -:- For detailed product information, please contact sales. -:

NUCu Steel - ASTM A710 Grade B Product Information -:- For detailed product information, please contact sales. -: # **Product Introduction: ASTM A710 Grade B (NUCu) Low-Carbon Precipitation-Hardening Steel** **ASTM A710 Grade B**, commonly referred to as **NUCu Steel**, is an advanced **low-carbon, copper-precipitation-hardened alloy steel** designed for **welded structures requiring an exceptional combination of high strength, excellent toughness, and superior atmospheric corrosion resistance**. Unlike conventional HSLA steels, NUCu steel derives its primary strength from the precipitation of fine, coherent copper-rich particles during a controlled **aging heat treatment**. This unique mechanism allows it to achieve **high yield strengths (typically 70-100 ksi / 485-690 MPa) while maintaining an extremely low carbon content (<0.07%)**, resulting in unparalleled weldability and notch toughness, even in thick sections. It is often specified for critical applications in **bridge construction, offshore platforms, pressure vessels, and military vehicles**. --- ## **International Standard & Key Specifications** * **Primary Standard:** **ASTM A710/A710M** - Standard Specification for Precipitation-Strengthened Low-Carbon Nickel-Copper-Chromium-Molybdenum-Columbium Alloy Structural Steel Plates. * **Key Distinction:** The specification defines steels that gain strength primarily from **precipitation hardening (aging)**, not from carbon content or conventional heat treatment like quenching. * **ASME Code Equivalent:** **SA-710/SA-710M** in ASME Boiler and Pressure Vessel Code, Section II, Part A, for pressure equipment. * **Related Specifications:** * **ASTM A20/A20M** - General Requirements for Steel Plates. * **ASTM A770** - Through-Thickness Tension Testing (often specified for thick plates). * **MIL-S-24645A (SH)** - Military specification for HSLA-100 steel, a related naval application. * **Common Tempers:** Supplied in different heat-treated conditions (e.g., **Class 1: Aged; Class 3: Quenched & Aged**) to achieve various strength-toughness combinations. --- ## **Chemical Composition (Weight %, max unless range is specified) - Grade B** The hallmark of NUCu steel is its ultra-low carbon, high-copper, nickel-alloyed composition designed for precipitation hardening. | Element | Composition (%) | Role in Performance | | :--- | :--- | :--- | | **Carbon (C)** | **0.07 max** | **Ultra-low.** The defining feature, ensuring exceptional weldability and base metal toughness. Shifts strengthening to precipitation. | | **Manganese (Mn)** | 0.40 - 0.70 | Solid solution strengthener, aids in sulfide shape control. | | **Phosphorus (P)** | 0.025 max | Impurity, kept very low. | | **Sulfur (S)** | 0.025 max | Impurity, tightly controlled for Z-direction ductility. | | **Silicon (Si)** | 0.15 - 0.50 | Deoxidizer. | | **Nickel (Ni)** | 0.70 - 1.00 | Enhances hardenability, low-temperature toughness, and complements copper's corrosion resistance. | | **Copper (Cu)** | **1.00 - 1.30** | **Primary precipitation-hardening element.** Forms nano-scale Cu-rich precipitates during aging, providing major strength increase. | | **Chromium (Cr)** | 0.40 - 0.65 | Improves atmospheric corrosion resistance and hardenability. | | **Molybdenum (Mo)** | 0.15 - 0.25 | Enhances hardenability and strength, particularly at elevated temperatures; reduces temper embrittlement risk. | | **Columbium (Cb/Nb)** | 0.02 - 0.10 | **Critical microalloy.** Provides grain refinement and additional precipitation strengthening via Nb(CN). | | **Vanadium (V)** | 0.03 - 0.08 | Optional microalloy for additional precipitation strengthening. | | **Aluminum (Al)** | 0.06 max | Grain refining deoxidizer. | | **Carbon Equivalent (CE)** | **Typically ≤ 0.40** | Extremely low, indicating excellent weldability. | --- ## **Typical Physical & Mechanical Properties** Properties depend on the specific class (heat treatment). **Grade B** typically corresponds to a yield strength of **70 ksi (485 MPa) minimum** in the aged condition (Class 1). | Property | Value / Description (Class 1 - Aged) | | :--- | :--- | | **Tensile Strength** | 585 - 725 MPa (85,000 - 105,000 psi) | | **Yield Strength (min)** | **485 MPa (70,000 psi)** | | **Elongation in 2-in (50 mm) (min)** | 20% | | **Reduction of Area (min)** | 50% | | **Modulus of Elasticity** | ~200 GPa (29 x 10⁶ psi) | | **Density** | ~7.85 g/cm³ | | **Charpy V-Notch Impact Toughness** | **Test Temperature:** **-100°F (-73°C)**. **Minimum Avg.:** **35 ft·lbf (48 J)**. *Exceptional toughness at cryogenic temperatures is a key advantage.* | | **Atmospheric Corrosion Resistance** | **4-6 times** greater than carbon steel (due to Cu, Ni, Cr content), functioning as a weathering steel. | | **Through-Thickness (Z-Direction) Ductility** | Excellent due to very low sulfur content; often exceeds 40% Reduction of Area in ASTM A770 tests. | | **Weldability (Pcm)** | **Pcm typically < 0.20**. Can often be welded **without preheat**, even in thick sections. | --- ## **Product Applications** NUCu (A710 Grade B) steel is specified for the most demanding structural and containment applications where weight savings, fabrication efficiency, and extreme environment performance are critical. **Primary Industries and Structures:** 1. **Advanced Bridge Construction:** * **Fracture-critical members** in long-span bridges. * **Components** for bridges in severe cold climates or coastal environments. 2. **Naval & Offshore Marine:** * **Hull structures** for naval ships (e.g., U.S. Navy's HSLA-100 is a derivative). * **Critical nodes and braces** in offshore oil & gas platforms. 3. **Pressure Vessels & Energy:** * **High-pressure vessels** for hydrogen storage and transportation. * **Cryogenic storage tanks** (LNG, industrial gases). * **Components in nuclear power plants**. 4. **Military & Aerospace:** * **Armored vehicle hulls** and structural components. * **Launch support structures** and missile components. 5. **Heavy Construction Equipment:** * **Booms and frames** for high-capacity cranes and excavators. --- ## **Advantages and Critical Fabrication Considerations** * **Advantages:** * **Unmatched Weldability:** The ultra-low carbon content allows welding **with little or no preheat**, drastically reducing fabrication cost, time, and distortion. * **Exceptional Toughness:** Maintains high impact energy down to cryogenic temperatures (-100°F). * **High Strength-to-Weight Ratio:** Enables lighter, more efficient designs. * **Excellent Corrosion Resistance:** Functions as a high-performance weathering steel. * **Resistance to Lamellar Tearing:** Superior Z-direction properties due to low S and fine microstructure. * **Critical Fabrication Considerations:** * **Heat Treatment Sensitivity:** Final properties are achieved through a **precise aging treatment**. Fabrication processes (e.g., welding, thermal cutting) must not expose the material to temperatures that would **over-age** (typically >1150°F / 620°C) and cause softening. A **post-weld aging** treatment may be required to restore full strength in the HAZ. * **Welding Procedure:** Although weldable without preheat, **low-hydrogen practices are still mandatory**. Filler metal selection is critical; Ni-Cu alloyed consumables are often used to match corrosion resistance and toughness. * **Thermal Cutting:** Plasma or laser cutting is preferred. If flame cutting is used, preheat is recommended to avoid hydrogen pickup, despite the low CE. * **Higher Material Cost:** The advanced alloying and processing result in a premium material cost, justified by lifecycle and fabrication savings. **In summary, ASTM A710 Grade B (NUCu) steel represents a paradigm shift in structural steel technology. By decoupling strength from carbon content, it achieves a previously unattainable synergy of ultra-high strength, outstanding toughness, and phenomenal weldability. It is the material of choice for engineers designing the next generation of safer, lighter, and more durable critical infrastructure under the most challenging environmental and loading conditions.** -:- For detailed product information, please contact sales. -: NUCu Steel - ASTM A710 Grade B Specification Dimensions Size： Diameter 20-1000 mm Length <4553 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. -: NUCu Steel - ASTM A710 Grade B Properties -:- For detailed product information, please contact sales. -:

Applications of NUCu Steel Flange - ASTM A710 Grade B -:- For detailed product information, please contact sales. -: Chemical Identifiers NUCu Steel Flange - ASTM A710 Grade B -:- For detailed product information, please contact sales. -:

Packing of NUCu Steel Flange - ASTM A710 Grade B -:- 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 1024 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