ASTM A148 Grade 150-135 Cast Steel Flange

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 A148 Grade 150-135 Cast Steel Flange Product Information -:- For detailed product information, please contact sales. -: ASTM A148 Grade 150-135 Cast Steel Flange Synonyms -:- For detailed product information, please contact sales. -:

ASTM A148 Grade 150-135 Cast Steel Product Information -:- For detailed product information, please contact sales. -: ### **Product Technical Datasheet: ASTM A148 Grade 150-135 Cast Steel** **1. Product Overview** ASTM A148 Grade 150-135 is a premium-grade, high-strength, low-alloy steel casting specified under the ASTM A148 standard. It represents the highest strength class within this specification, designed for the most demanding structural applications where extreme mechanical properties and weight reduction are paramount. The grade designation "150-135" explicitly defines its minimum mechanical performance: **150 ksi (1035 MPa) tensile strength** and **135 ksi (930 MPa) yield strength**. Castings of this grade are invariably supplied in the heat-treated (quenched and tempered) condition to achieve this exceptional combination of strength and toughness. **2. Governing International Standard** The definitive standard for this product is **ASTM A148 / A148M - Standard Specification for Steel Castings, High Strength, for Structural Purposes**. This standard categorizes cast steels by their minimum tensile and yield strength requirements. Grade 150-135 sits at the top of this hierarchy, intended for components subjected to severe stress and dynamic loading. **3. Chemical Composition** While ASTM A148 primarily mandates mechanical properties, allowing foundries flexibility in chemistry to meet them, Grade 150-135 typically requires a carefully balanced low-alloy steel composition to achieve its hardenability and strength. A representative chemical analysis is as follows (in weight %, maximum unless range is given): * **Carbon (C):** 0.40 - 0.50% * **Manganese (Mn):** 0.70 - 1.00% * **Silicon (Si):** 0.30 - 0.60% * **Phosphorus (P):** 0.025% max * **Sulfur (S):** 0.025% max * **Chromium (Cr):** 0.90 - 1.20% * **Nickel (Ni):** 1.60 - 2.20% * **Molybdenum (Mo):** 0.25 - 0.40% * **(Optional) Vanadium (V):** 0.03 - 0.08% (may be added for grain refinement) **Note:** Final alloy composition is optimized by the foundry to ensure the required properties are consistently met in the specified casting section sizes. **4. Physical & Mechanical Properties** * **Minimum Mechanical Properties (as per ASTM A148):** * **Tensile Strength:** 150 ksi (1035 MPa) * **Yield Strength (0.2% Offset):** 135 ksi (930 MPa) * **Elongation in 2" (50 mm):** 6% * **Reduction of Area:** 25% * **Typical Achieved Properties (After Quench & Temper):** * **Hardness:** 321 - 375 HBW (Brinell Hardness) * **Modulus of Elasticity:** 29 x 10⁶ psi (200 GPa) * **Poisson's Ratio:** 0.29 * **Density:** 7.85 g/cm³ * **Heat Treatment:** **Quenching and Tempering (Q&T)** is mandatory. The precise quenching medium (oil or water) and tempering temperature are critically controlled to develop the required martensitic/bainitic microstructure that delivers this exceptional strength-toughness balance. **5. Key Characteristics & Engineering Advantages** * **Ultra-High Strength:** Provides the highest load-bearing capacity among ASTM A148 grades, enabling the design of lighter, more compact components. * **Good Fracture Toughness:** For its strength level, it maintains valuable ductility and resistance to crack propagation, crucial for dynamic loading. * **Good Wear and Abrasion Resistance:** The high hardness and strength make it suitable for components in contact with abrasive materials. * **Machinability:** **Difficult.** Requires powerful machinery, rigid setups, premium cutting tools (carbide or ceramic), and appropriate feeds/speeds due to its high hardness and strength. * **Weldability:** **Poor to Very Difficult.** Welding requires extreme caution. **Mandatory procedures** include high preheat (300-400°F / 150-200°C), strict control of interpass temperature, use of high-strength, low-hydrogen electrodes, and **mandatory Post-Weld Heat Treatment (PWHT)** to restore properties and relieve stresses in the Heat-Affected Zone (HAZ). Fabrication welding is generally discouraged; repair welding must follow qualified procedures. **6. Typical Applications** This grade is specified for critical, highly stressed components in severe service environments: * **Mining & Aggregate Processing:** Gyratory crusher mantles/cones, jaw crusher parts, shovel dipper teeth and adapters, dredge pump casings, heavy-duty chain links. * **Construction & Heavy Equipment:** Critical pins, bushings, and links for excavators and draglines, high-stress structural weldments, crane sheave wheels. * **Oil, Gas & Geothermal:** High-pressure valve bodies and components, wellhead equipment parts, drilling tool joints (where specified). * **Defense & Aerospace:** Armored vehicle components, tank track links, heavy-duty landing gear and suspension parts for aircraft. * **Power Generation:** High-integrity structural components for turbines and generators, where high strength-to-weight ratio is critical. **7. Summary** ASTM A148 Grade 150-135 is the pinnacle of high-strength structural cast steels within the A148 specification. It delivers unmatched tensile and yield strength, making it an engineering choice for applications where performance and reliability under extreme stress are non-negotiable. Its use demands careful consideration of manufacturing constraints, particularly regarding machining and welding. When applied appropriately, it enables innovative, weight-optimized designs for the world's most challenging industrial equipment. -:- For detailed product information, please contact sales. -: ASTM A148 Grade 150-135 Cast Steel Specification Dimensions Size： Diameter 20-1000 mm Length <5852 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 A148 Grade 150-135 Cast Steel Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A148 Grade 150-135 Cast Steel Flange -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A148 Grade 150-135 Cast Steel Flange -:- For detailed product information, please contact sales. -:

Packing of ASTM A148 Grade 150-135 Cast Steel Flange -:- 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 2323 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