Cast Stainless Steel Flange CB7Cu-2, ASTM A747

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. -: Cast Stainless Steel Flange CB7Cu-2, ASTM A747 Product Information -:- For detailed product information, please contact sales. -: Cast Stainless Steel Flange CB7Cu-2, ASTM A747 Synonyms -:- For detailed product information, please contact sales. -:

Cast Stainless Steel CB7Cu-2, ASTM A747 Product Information -:- For detailed product information, please contact sales. -: ### **Product Datasheet: Cast Stainless Steel CB7Cu-2, ASTM A747** #### **1. Product Overview** Cast Stainless Steel CB7Cu-2 under ASTM A747 specification is a precipitation-hardening martensitic stainless steel designed to provide an optimal balance of high strength, good corrosion resistance, and excellent mechanical properties. As an enhanced version of the CB7Cu series, this alloy offers improved performance characteristics through optimized chemical composition and heat treatment response. The material is particularly suitable for applications requiring superior strength-to-weight ratio and resistance to corrosive environments. **Key Advantages:** - **Enhanced Strength Properties:** Higher strength capabilities compared to standard precipitation-hardening grades - **Good Corrosion Resistance:** Excellent performance in various corrosive environments - **Precipitation Hardening Capability:** Achieves high strength through simple aging treatment - **Excellent Fatigue Strength:** Superior resistance to dynamic loading conditions - **Good Dimensional Stability:** Minimal distortion during heat treatment --- #### **2. International Standard** This product conforms to the latest edition of: - **ASTM A747/A747M:** Standard Specification for Steel Castings, Stainless, Precipitation Hardening Additional applicable standards: - **UNS J92180:** Unified Numbering System designation (shared with CB7Cu-1) - **ASME SA747:** ASME Boiler and Pressure Vessel Code equivalent - **AMS 5355:** Aerospace Material Specification --- #### **3. Chemical Composition (Heat Analysis, %)** The chemical composition is carefully balanced to enhance precipitation hardening response and mechanical properties. | Element | Composition (%) | |---------|-----------------| | Carbon (C) | 0.07 max | | Manganese (Mn) | 1.00 max | | Silicon (Si) | 1.00 max | | Phosphorus (P), max | 0.04 | | Sulfur (S), max | 0.03 | | Chromium (Cr) | 14.0-15.5 | | Nickel (Ni) | 4.5-5.5 | | Copper (Cu) | 2.5-3.5 | | Columbium + Tantalum (Cb+Ta) | 0.15-0.35 | | Molybdenum (Mo) | 0.5-1.0 | *Note: The modified composition provides enhanced strength and corrosion resistance properties.* --- #### **4. Mechanical Properties** Mechanical properties are achieved through specific aging treatments as defined in ASTM A747. **Condition H1150 (Aged at 1150°F/620°C):** - **Tensile Strength:** 1100 MPa (160 ksi) min - **Yield Strength (0.2% Offset):** 950 MPa (138 ksi) min - **Elongation in 2" (50 mm):** 10% min - **Reduction of Area:** 35% min - **Hardness:** 311-375 HBW **Condition H1100 (Aged at 1100°F/595°C):** - **Tensile Strength:** 1200 MPa (174 ksi) min - **Yield Strength:** 1100 MPa (160 ksi) min - **Elongation:** 8% min - **Hardness:** 352-401 HBW **Condition H1075 (Aged at 1075°F/580°C):** - **Tensile Strength:** 1275 MPa (185 ksi) min - **Yield Strength:** 1170 MPa (170 ksi) min - **Elongation:** 6% min - **Hardness:** 388-444 HBW --- #### **5. Physical Properties (Typical Values)** - **Density:** 7.78 g/cm³ (0.281 lb/in³) - **Modulus of Elasticity:** 200 GPa (29,000 ksi) - **Poisson's Ratio:** 0.27-0.30 - **Thermal Conductivity:** 19.5 W/m·K (at 100°C) - **Specific Heat Capacity:** 460 J/kg·K (at 0-100°C) - **Coefficient of Thermal Expansion:** 10.9 × 10⁻⁶/°C (20-100°C) - **Magnetic Permeability:** Magnetic in all heat-treated conditions --- #### **6. Heat Treatment** **Standard Heat Treatment Sequence:** **Solution Annealing:** - Temperature: 1040-1060°C (1900-1940°F) - Soak time: 1-2 hours per inch of thickness - Cooling: Air cool or forced air cool **Precipitation Hardening (Aging):** - **Condition H1150:** 620°C ± 10°C (1150°F ± 20°F) for 4 hours - **Condition H1100:** 595°C ± 10°C (1100°F ± 20°F) for 4 hours - **Condition H1075:** 580°C ± 10°C (1075°F ± 20°F) for 4 hours - Cooling: Air cool to room temperature --- #### **7. Corrosion Resistance** - **Atmospheric:** Excellent resistance to industrial and marine environments - **Aqueous Solutions:** Good performance in fresh water, steam, and mild chemical solutions - **Chemical Media:** - Good resistance to organic acids and alkaline solutions - Moderate resistance to dilute mineral acids - Enhanced pitting resistance due to molybdenum content - **Stress Corrosion Cracking:** Improved resistance compared to standard martensitic grades - **Oxidation Resistance:** Good scaling resistance up to 600°C (1112°F) --- #### **8. Product Applications** CB7Cu-2 under ASTM A747 is utilized in high-performance applications requiring superior mechanical properties and corrosion resistance. **Primary Applications Include:** - **Aerospace Components:** Structural fittings, actuator components, and engine parts - **Defense Industry:** Weapon systems components, armored vehicle parts - **Marine Technology:** Propeller shafts, submarine components, naval hardware - **Oil & Gas Equipment:** Valve bodies, wellhead components, downhole tools - **Chemical Processing:** Pump shafts, mixer components, reactor parts - **Power Generation:** Turbine blades, compressor components, fasteners - **High-Performance Automotive:** Racing components, turbocharger parts --- #### **9. Fabrication & Welding Characteristics** **Casting Characteristics:** - Good castability with proper foundry techniques - Pattern shrinkage: 20-22 mm/m - Requires adequate feeding system design - Suitable for complex geometries and thin sections **Machining:** - Recommended in solution-treated condition - Use carbide tools with positive rake geometry - Cutting speeds: 15-25 m/min (50-80 SFM) - Adequate cooling and lubrication essential **Welding:** - **Weldability:** Good with proper procedures - Preheating: 150-200°C (300-400°F) recommended - Post-weld heat treatment: Full solution and aging treatment required - Filler metals: Matching composition or AWS E/ER630 --- #### **10. Quality Assurance & Testing** - **Chemical Analysis:** Per ASTM A751 specifications - **Mechanical Testing:** Tensile tests according to ASTM A370 - **Hardness Testing:** Multiple location verification - **Non-Destructive Examination:** - Radiographic testing per ASTM E94 - Liquid penetrant testing per ASTM E165 - Magnetic particle testing per ASTM E709 - **Heat Treatment Documentation:** Complete traceability of thermal cycles - **Certification:** Comprehensive mill test certificates with full traceability --- **Disclaimer:** This technical datasheet provides general information for reference purposes only. CB7Cu-2 stainless steel requires specific heat treatment to achieve the desired mechanical properties. Performance characteristics may vary based on casting design, heat treatment parameters, and service conditions. Always consult the complete ASTM A747 standard and qualified materials engineers for critical applications. Proper selection of aging condition is crucial for achieving the required balance of strength, toughness, and corrosion resistance. -:- For detailed product information, please contact sales. -: Cast Stainless Steel CB7Cu-2, ASTM A747 Specification Dimensions Size： Diameter 20-1000 mm Length <4173 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. -: Cast Stainless Steel CB7Cu-2, ASTM A747 Properties -:- For detailed product information, please contact sales. -:

Applications of Cast Stainless Steel Flange CB7Cu-2, ASTM A747 -:- For detailed product information, please contact sales. -: Chemical Identifiers Cast Stainless Steel Flange CB7Cu-2, ASTM A747 -:- For detailed product information, please contact sales. -:

Packing of Cast Stainless Steel Flange CB7Cu-2, ASTM A747 -:- 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 644 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