Iron Flange grade 80-55-06

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. -: Ductile Iron Flange grade 80-55-06 Product Information -:- For detailed product information, please contact sales. -: Ductile Iron Flange grade 80-55-06 Synonyms -:- For detailed product information, please contact sales. -:

Ductile Iron grade 80-55-06 Product Information -:- For detailed product information, please contact sales. -: ### **Product Technical Data Sheet: Ductile Iron (Nodular Iron) Grade 80-55-06** --- #### **1. Product Overview** Ductile Iron Grade 80-55-06 is a **high-strength, predominantly pearlitic grade** engineered to deliver superior tensile and yield strength while retaining a valuable degree of ductility. The grade designation defines its minimum mechanical properties: **80 ksi (550 MPa) tensile strength, 55 ksi (380 MPa) yield strength, and 6% elongation**. This grade is typically produced through a **normalizing heat treatment** to achieve a consistent, refined pearlitic matrix, resulting in excellent **fatigue strength, wear resistance, and stiffness**. It serves as a critical upgrade from lower-strength grades like 65-45-12 for applications subjected to higher stresses, more severe wear, or where component lightweighting through higher allowable stresses is desired. #### **2. Governing International Standards** This high-performance grade is recognized under major international standards, with close alignment between systems. * **Primary Designation: ASTM A536** - *Standard Specification for Ductile Iron Castings*. The grade is designated as **80-55-06**. * **Alternative Designations:** * **ISO 1083:** Designated as **EN-GJS-600-5** or **JS/1050-05** (600 MPa tensile, 370 MPa yield, 5% elongation). This is the closest commercial and technical equivalent, though minor property differences exist. * **EN 1563:** (European Standard) **EN-GJS-600-5**. * **SAE J434:** (Automotive) **D5506** (Note: SAE D5506 covers 80-55-06; D5506 can also cover 80-60-03 depending on elongation specification). * **Key Testing Standards:** * **Tensile Test:** ASTM E8 / ISO 6892-1. * **Microstructure:** ASTM A247 / ISO 945 (High nodularity with a matrix of >80% pearlite is typical). #### **3. Typical Chemical Composition (Normalized Condition)** The chemistry is designed to respond effectively to normalizing, producing a strong, pearlitic microstructure. | Element | Target Range (%) | Functional Role | | :--- | :--- | :--- | | **Carbon (C)** | 3.4 - 3.7 | Slightly lower than ferritic grades to reduce carbon in the matrix, strengthening the pearlite. | | **Silicon (Si)** | 2.0 - 2.4 | Controlled to limit ferrite formation and achieve the target pearlite content post-normalizing. | | **Manganese (Mn)** | 0.3 - 0.6 | A key pearlite stabilizer. Ensures a fully pearlitic structure, especially in the core of thicker sections after normalizing. | | **Magnesium (Mg)** | 0.03 - 0.05 | Essential nodulizing element. | | **Copper (Cu)** | 0.4 - 0.8 | **Primary alloying element.** A strong and uniform pearlite promoter, critical for achieving consistent high strength and hardness throughout varying casting sections. | | **Molybdenum (Mo)** | 0 - 0.25 | May be added to increase hardenability in very heavy sections, preventing unwanted ferrite. | | **Phosphorus (P)** | ≤ 0.04 | Kept low. | | **Sulfur (S)** | ≤ 0.015 | Kept very low. | #### **4. Physical & Mechanical Properties** This grade is defined by high strength and good wear resistance. | Property | Minimum / Typical Value | Test Standard & Notes | | :--- | :--- | :--- | | **Tensile Strength, min.** | **80 ksi (550 MPa)** | ASTM A536 | | **Yield Strength (0.2% offset), min.** | **55 ksi (380 MPa)** | High yield strength is a key design advantage, providing a high safety factor against deformation. | | **Elongation, min.** | **6%** (in 2 inches or 50mm) | Maintains measurable ductility, important for absorbing shock loads and stress concentrations. | | **Hardness (Brinell)** | 207 - 255 HBW | Typically 217-241 HBW. The higher hardness contributes to excellent abrasion and adhesive wear resistance. | | **Modulus of Elasticity** | 24 - 25 x 10⁶ psi (165 - 172 GPa) | High stiffness, beneficial for components requiring dimensional stability under load. | | **Charpy Impact (Unnotched) @ 23°C** | 15 - 25 J (Typical) | Adequate impact resistance for many high-strength applications, though lower than ferritic grades. | | **Fatigue Endurance Limit** | ~260 - 290 MPa (≈ 0.47-0.53 x UTS) | **Excellent fatigue performance**, a standout feature of this grade, making it ideal for cyclically loaded parts. | | **Density** | 0.256 lb/in³ (7.1 g/cm³) | | | **Microstructure** | **>80% Pearlite** matrix with **>80% Nodularity**. The balance is typically bull's eye ferrite surrounding the graphite nodules. | The refined pearlite from normalizing is responsible for the high strength and fatigue resistance. | #### **5. Product Applications** Grade 80-55-06 is specified for demanding applications where increased load-bearing capacity, wear life, and fatigue resistance are paramount. * **Automotive & Truck (Primary Market):** **Crankshafts (especially for mid-range engines), camshafts, high-pressure diesel engine cylinder heads, gearbox cases, heavy-duty differential carriers, and ring gears.** Its fatigue strength is critical for powertrain components. * **Heavy Machinery & Construction:** **Drive gears, track rollers and links for excavators, hydraulic pump bodies, compressor crankshafts, and large bearing housings.** * **Industrial Equipment:** **Press columns, machine tool spindles, feed screws, rollers for rolling mills, and heavy-duty valve bodies.** * **Agriculture:** **Final drive gear housings, combine harvester gearboxes, and high-stress implement components.** * **Energy:** **Components for wind turbine gearboxes** where high fatigue strength under variable loads is essential. #### **6. Fabrication & Heat Treatment Notes** * **Primary Condition:** **Normalized.** The standard production route involves heating to 870-900°C, followed by air cooling. This refines the grain structure, ensures a uniform and controlled pearlitic matrix, and optimizes the mechanical properties, particularly fatigue strength. * **Machinability:** **Fair to Good.** More demanding than ferritic grades but generally good for its strength level. The pearlitic structure is abrasive, requiring appropriate tool materials (e.g., carbide) and coolants. * **Weldability:** **Poor.** Not recommended for fabrication. Repair welding is possible but requires extreme caution: high pre-heat (500-600°C), specialized nickel-based filler metals, controlled interpass temperature, and mandatory post-weld stress relief to avoid cracking in the hardened heat-affected zone (HAZ). #### **7. Ordering Information** Specify: **"Ductile Iron Castings, ASTM A536 Grade 80-55-06 (Normalized)"**. Key details to include: * **Condition:** Explicitly state "Normalized". * **Drawing/Part Specification.** * **Required certifications:** Foundry Test Report must include tensile properties and hardness. Microstructure verification (pearlite content) is often requested. * **Special Requirements:** For critical components, specify non-destructive testing (NDT) such as ultrasonic testing for internal soundness or magnetic particle inspection for surface quality. Fatigue testing may be specified for validation. **Grade 80-55-06 represents a premium engineering material, offering a near-ideal balance of very high strength, good fatigue resistance, and retained ductility, making it a first-choice upgrade for components where performance limits are being pushed.** -:- For detailed product information, please contact sales. -: Ductile Iron grade 80-55-06 Specification Dimensions Size： Diameter 20-1000 mm Length <6521 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. -: Ductile Iron grade 80-55-06 Properties -:- For detailed product information, please contact sales. -:

Applications of Ductile Iron Flange grade 80-55-06 -:- For detailed product information, please contact sales. -: Chemical Identifiers Ductile Iron Flange grade 80-55-06 -:- For detailed product information, please contact sales. -:

Packing of Ductile Iron Flange grade 80-55-06 -:- 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 2992 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