Iron Flange torsion grade 120-90-02

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 torsion grade 120-90-02 Product Information -:- For detailed product information, please contact sales. -: Ductile Iron Flange torsion grade 120-90-02 Synonyms -:- For detailed product information, please contact sales. -:

Ductile Iron torsion grade 120-90-02 Product Information -:- For detailed product information, please contact sales. -: ### **Product Technical Data Sheet: Ductile Iron – Grade 120-90-02 (Ultra-High-Strength) for Extreme Torsion Applications** --- #### **1. Product Overview** **Ductile Iron Grade 120-90-02** represents the **ultimate tier of torsional performance** achievable with ductile iron technology, engineered for applications demanding **maximum shear strength, exceptional fatigue resistance under cyclic torque, and superior resistance to torsional deformation**. To achieve these properties, the material **must undergo specialized heat treatment**—typically **Austempering (ADI) or Quenching & Tempering (QT)**—resulting in an ausferritic or tempered martensitic microstructure. This grade delivers torsional performance that rivals or exceeds many alloy steels, making it suitable for the most critical, highly stressed power transmission components where failure is not an option and weight savings are paramount. --- #### **2. Governing International Standards & Specifications** This grade's exceptional torsional capability is a direct result of specific heat treatment processes. * **Primary Reference (Tensile Basis): ASTM A536** - Includes **Grade 120-90-02** as a performance target for heat-treated material. * **Governing Heat Treatment Standards (Critical for Properties):** * **ASTM A897 / A897M** - *Austempered Ductile Iron (ADI) Castings*. Grades such as **900/650/08, 1050/700/05, or 1200/850/04** provide the microstructure for extreme torsional performance. * **ISO 17804:** *Austempered spheroidal graphite cast irons*. Grades like **JS/1000/5/400/12** are relevant. * **Proprietary QT Specifications:** For Quenched & Tempered ductile iron achieving this performance level. * **Key Referenced Testing Standards:** * **Torsional Testing:** ASTM A938 / ISO 7800. * **Tensile & Hardness (for certification):** ASTM E8, E10/E18. * **Fatigue Testing:** Torsional fatigue validation per SAE J1099 or custom specifications is mandatory for critical parts. --- #### **3. Typical Chemical Composition (Base Iron for ADI/QT)** Chemistry is meticulously designed for extreme hardenability and microstructural control under heat treatment. | Element | Target Range (%) | Functional Role for Extreme Torsion Performance | | :--- | :--- | :--- | | **Carbon (C)** | 3.5 - 3.7 | Provides carbon for matrix strengthening and stable graphite formation. | | **Silicon (Si)** | **2.4 - 2.8** | **Crucial.** In ADI, enables formation of high-carbon stabilized austenite within ausferrite, enhancing fracture toughness under shear. | | **Manganese (Mn)** | **0.20 - 0.40** | Controlled to ensure hardenability while minimizing segregation that could create brittle paths under high shear stress. | | **Magnesium (Mg)** | 0.03 - 0.05 | Ensures very high nodularity (>90%) for optimal shear stress distribution. | | **Copper (Cu)** | **0.8 - 1.2** | Strong hardenability agent; ensures uniform high strength to the core under torsional load. | | **Molybdenum (Mo)** | **0.3 - 0.6** | **Essential.** Provides deep hardenability to achieve fully martensitic or ausferritic matrix in thick sections, preventing soft core zones. | | **Nickel (Ni)** | 0.5 - 1.5 | Used with Mo to improve hardenability and toughness, critical for shock torque resistance. | | **Phosphorus (P)** | **≤ 0.030** | Extremely low to eliminate grain boundary embrittlement under triaxial stress states. | --- #### **4. Physical & Mechanical Properties (Torsion Focus)** This material operates at the frontier of cast material torsional performance. | Property | Value / Performance | Significance for Extreme Torsion Applications | | :--- | :--- | :--- | | **Shear Modulus (G)** | **~66 - 69 GPa (9.6 - 10.0 x 10⁶ psi)** | Very high stiffness minimizes angular deflection, critical for precision and timing. | | **Torsional Yield Strength (approx.)** | **~500 - 600 MPa (73 - 87 ksi)** | Estimated as **0.8 - 1.0 x Tensile Yield Strength (620 MPa)**. Exceptionally high resistance to plastic twist. | | **Ultimate Torsional Strength (approx.)** | **~750 - 850 MPa (109 - 123 ksi)** | Estimated as **0.9 - 1.0 x Tensile Strength (830 MPa)**. | | **Tensile Properties (Certification Basis)** | **830 MPa UTS, 620 MPa YS, 2% Elongation (min)** | The baseline for qualification. | | **Fatigue Limit (Torsional)** | **~350 - 420 MPa** | **Exceptional.** The ausferritic/martensitic microstructure provides outstanding resistance to failure under high-cycle reversed torsion. | | **Hardness** | **280 - 360 HBW (30-38 HRC)** | Provides supreme resistance to fretting, wear, and brinelling in splines and bearing areas. | | **Damping Capacity** | **2-3 times greater than steel** | A significant advantage over steel, reducing noise and high-frequency torsional vibrations. | --- #### **5. Product Applications (Extreme Torsion-Dominant)** This grade is reserved for the most critical, highly loaded torsional components in demanding industries. * **High-Performance & Racing:** **Driveshafts, half-shafts, and torsion bars** for high-horsepower automotive and motorsport applications. * **Heavy-Duty Powertrain:** **Main transmission input/output shafts for mining trucks, locomotive drive shafts, and high-torque PTO shafts** for oilfield equipment. * **Aerospace & Defense:** **Actuator drive shafts, rotor mast components, and torsion-critical linkages** in aerospace systems. * **Industrial Machinery:** **Main spindle shafts for high-power machining centers, rolls in heavy rolling mills, and mixer shafts for high-viscosity materials.** * **Energy & Marine:** **High-speed compressor shafts, turbine coupling shafts, and propulsion shafting components** for demanding marine applications. --- #### **6. Fabrication & Design Notes** * **Condition:** **Exclusively Supplied Heat-Treated (ADI or QT).** The specific heat treatment cycle is integral to the material specification. * **Design Philosophy:** Can utilize the **extremely high torsional yield strength** for maximum power density. **Advanced FEA modeling**, including fatigue analysis, is mandatory. **Surface compressive stresses** induced by processes like shot peening or roller burnishing are highly beneficial for fatigue life. Attention to **geometric stress concentrators** is absolutely critical. * **Machinability:** **Very Difficult.** All significant machining must be performed in a soft, annealed state prior to final heat treatment. Post-heat treatment finishing is limited to grinding, honing, or hard machining with PCBN/PCD tooling. * **Surface Enhancement:** **Induction hardening** or **nitriding** can be applied to specific areas (e.g., splines, bearing journals) to achieve surface hardness >55 HRC for extreme wear resistance, while the ADI/QT core provides the strength. --- #### **7. Ordering Information** Specification must be unambiguous and process-defined. **Specify:** **"Austempered Ductile Iron (ADI) Castings, per ASTM A897 Grade 1050/700/05 [or equivalent], for Extreme Torsional Application"** OR **"Quenched & Tempered Ductile Iron Castings, Grade 120-90-02, per [Proprietary Specification]."** **Mandatory Requirements:** * **Exact Heat Treatment Process & Standard.** * **Minimum Mechanical Properties** (Tensile, Yield, Hardness). * **Torsional Performance Requirements** (design torque, fatigue life cycles). * **Section Size & Geometry** (for hardenability validation). * **Certification:** Full traceability with MTR, heat treatment charts, mechanical tests, microstructure report, and mandated NDT reports (100% UT & MPI). * **Validation Testing:** **Component-level torsion and fatigue testing** is typically required for design qualification. **Grade 120-90-02 (ADI/QT) transcends conventional ductile iron, enabling the design of ultra-high-strength torsional components that withstand forces once exclusive to premium alloy steel forgings, while offering unique benefits in damping, complexity, and cost.** -:- For detailed product information, please contact sales. -: Ductile Iron torsion grade 120-90-02 Specification Dimensions Size： Diameter 20-1000 mm Length <6542 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 torsion grade 120-90-02 Properties -:- For detailed product information, please contact sales. -:

Applications of Ductile Iron Flange torsion grade 120-90-02 -:- For detailed product information, please contact sales. -: Chemical Identifiers Ductile Iron Flange torsion grade 120-90-02 -:- For detailed product information, please contact sales. -:

Packing of Ductile Iron Flange torsion grade 120-90-02 -:- 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 3013 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