Class II Type C 15% Cr-Mo-HC Martensitic White Cast Iron 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. -: Class II Type C 15% Cr-Mo-HC Martensitic White Cast Iron Flange Product Information -:- For detailed product information, please contact sales. -: Class II Type C 15% Cr-Mo-HC Martensitic White Cast Iron Flange Synonyms -:- For detailed product information, please contact sales. -:

Class II Type C 15% Cr-Mo-HC Martensitic White Cast Iron Product Information -:- For detailed product information, please contact sales. -: ## **Product Introduction: Class II Type C 15% Cr-Mo-HC Martensitic White Cast Iron** Class II Type C 15% Cr-Mo-HC Martensitic White Cast Iron is a premier abrasion-resistant alloy engineered to deliver maximum wear resistance in severe grinding and gouging environments. As a high-carbon ("HC") variant within the ASTM A532 15% chromium-molybdenum family, this material prioritizes peak hardness and volumetric abrasion resistance above all else. The elevated carbon content drives the formation of a high volume fraction of hard, interconnected chromium carbides within a strong martensitic matrix, creating a microstructure optimized to withstand extreme mechanical wear. It is designed for applications where abrasive wear is the dominant failure mechanism and impact forces, while present, are less severe than those experienced by lower-carbon grades. This grade represents the pinnacle of pure abrasion resistance within the widely-used 15% Cr white iron class, offering extended service life in high-wear, moderate-impact applications. --- ### **1. Chemical Composition** The composition is defined by high carbon content paired with sufficient chromium to form carbides and molybdenum to ensure martensitic hardenability. **Typical Composition Range (ASTM A532 Class II Type C):** | Element | Content (%) | Primary Function | | :--- | :--- | :--- | | **Chromium (Cr)** | **14.0 - 18.0** | **Primary carbide former and corrosion resistor.** Combines with carbon to form a high volume of hard (Cr,Fe)₇C₃ carbides. Provides inherent resistance to oxidation and corrosion, protecting both the matrix and carbide interfaces. | | **Molybdenum (Mo)** | **2.3 - 3.5** | **Essential hardenability agent.** Crucial for suppressing pearlite formation during cooling, enabling the transformation of the austenitic matrix to martensite upon heat treatment, even in thick casting sections. | | **Carbon (C)** | **3.2 - 3.6** | **High Carbon ("HC") carbide former.** This is the defining characteristic. High carbon ensures a maximum volume fraction of hard, primary and eutectic chromium carbides, directly translating to superior abrasion resistance. | | **Manganese (Mn)** | 0.5 - 1.5 | Supports hardenability and acts as a deoxidizer. | | **Silicon (Si)** | 0.5 - 1.2 | Deoxidizer; kept low to prevent graphite formation which would compromise wear resistance. | | **Nickel (Ni)** | **0 - 2.5** (Optional) | May be added to further enhance hardenability, particularly in complex or heavy-section castings, and to provide a marginal toughness improvement. | | **Copper (Cu)** | 0 - 1.2 (Optional) | Occasionally used for supplementary hardenability. | | **Iron (Fe)** | Balance | Base metal. | **Microstructural Note:** The as-cast structure consists of austenite and a dense network of eutectic M₇C₃ carbides. Following a standard destabilization heat treatment (typically 950-1050°C followed by air or fan cooling), the microstructure transforms into a **hard martensitic matrix** with a **high volume fraction (typically 30-40%) of interconnected or blocky (Cr,Fe)₇C₃ carbides**. The carbides form a continuous or semi-continuous skeleton that provides the primary wear resistance. --- ### **2. Physical & Mechanical Properties** Properties are dominated by the hard, brittle carbide phase, offering exceptional wear resistance at the expense of toughness. | Property | Typical Value / Description | | :--- | :--- | | **Microstructure (Heat-Treated)** | **Martensitic matrix with a high volume of interconnected M₇C₃ carbides.** | | **Density** | ~7.6 - 7.7 g/cm³ | | **Macrohardness** | **650 - 750+ HB** (62 - 68 HRC) – Among the highest achievable hardness levels for commercial cast abrasion-resistant alloys. | | **Compressive Strength** | **Extremely High** – Excellent for withstanding heavy crushing and grinding pressures. | | **Tensile Strength** | Low (300 - 500 MPa) – Not a design parameter. | | **Elongation** | **Negligible (< 0.2%)** – Highly brittle material. | | **Fracture Toughness (K_IC)** | **Low (~8-15 MPa√m).** The high carbide volume and interconnected network create numerous stress concentrators, making the material susceptible to crack propagation under impact. | | **Impact Resistance (Charpy Unnotched)** | **5 - 15 J** – Low impact resistance; requires careful design and installation to avoid stress concentrations and direct heavy shock. | | **Abrasion Resistance** | **Exceptional.** Provides outstanding resistance to high-stress grinding abrasion (gouging and grinding) where the abrasive medium is of equal or lower hardness than the carbides (e.g., silica, taconite). It is a benchmark material for pure abrasive wear. | | **Corrosion & Oxidation Resistance** | **Very Good.** The high chromium content provides excellent protection against rust and scaling, beneficial in wet or semi-corrosive environments. | | **Elevated Temperature Stability** | **Good.** Maintains hardness at moderate temperatures (up to ~500°C) better than low-alloy steels. | | **Machinability** | **Extremely Poor.** Can only be finished by grinding. Cast to net or near-net shape is essential. | --- ### **3. Key Product Advantages & Characteristics** * **Maximum Abrasion Resistance:** Delivers the highest level of wear protection available in standardized 15% Cr white irons, ideal for gradual wear applications. * **Excellent Compressive Strength:** Withstands extreme pressures without deformation, suitable for grinding and crushing roles. * **Good Environmental Resistance:** Performs well in damp, corrosive, or moderately hot environments where lower-alloy materials would degrade faster. * **Predictable Wear Life:** Offers consistent and extended service life in controlled, high-abrasion conditions. --- ### **4. Product Applications** This material is specified for high-wear, low-to-moderate impact components where wear life is the paramount concern. * **Mining & Mineral Processing:** **Grinding mill liners** (especially in ball and SAG mills), **slurry pump volutes and impellers** for highly abrasive slurries, **hydrocyclone liners**, classifier shoes. * **Cement Industry:** **Finish mill liners**, **high-pressure grinding roll (HPGR) studs**, vertical mill grinding tables and rollers, clinker crusher wear plates. * **Power Generation:** **Coal pulverizer grinding rolls and tires**, fan blades in abrasive flue gas paths, ash conveyor components. * **Dredging & Sand Processing:** Pump casing liners, suction pipe elbows, and wear plates handling pure sand and gravel slurries. * **Shot Blasting:** Machine liners and impellers where direct, high-velocity abrasive impingement is the primary wear mechanism. --- ### **5. International Standards** Class II Type C is a well-defined grade under the primary ASTM standard, distinguished by its high carbon content. | Standard | Title / Scope | Common Designations / Notes | | :--- | :--- | :--- | | **ASTM A532/A532M** | *Standard Specification for Abrasion-Resistant Cast Irons* | **Class II Type C** is the definitive standard for 15% Cr-Mo-HC martensitic white iron. | | **ISO 21988** | *Abrasion-resistant cast irons* | Can be cross-referenced. Equivalent ISO grades will specify similar high Cr, Mo, and high C content. | | **BS 4844** | *Abrasion resisting white cast irons* (British, historical) | **Grade 2C** is the equivalent high-carbon, 15% Cr grade. | | **JIS G5511** | *Abrasion-resistant white cast irons* (Japanese) | The **SMC 650** or similar high-hardness grades often correspond to this chemistry. | | **DIN EN 12513** | *Founding - Abrasion resistant cast irons* (European) | A grade like **G-X 360 CrMo 15 3** indicates a high-carbon (~3.6% C), 15% Cr, 3% Mo alloy, closely matching Type C. | **Specification Note:** Procurement requires precise specification of **"ASTM A532, Class II Type C."** Due to its high hardness and brittleness, critical supplementary requirements include: * **Minimum Hardness:** Strictly specified, often 650 HB or 700 HB minimum. * **Heat Treatment Protocol:** Detailed requirements for the destabilization temperature, time, and cooling rate to ensure consistent microstructure and hardness. * **Section Size Limitation:** Guarantee that specified hardness is achieved in the relevant casting wall thickness. * **NDT Requirements:** Rigorous non-destructive testing (e.g., magnetic particle inspection) is mandatory to detect any casting defects that could act as failure initiation sites under load. --- ### **Conclusion** Class II Type C 15% Cr-Mo-HC Martensitic White Cast Iron is the **ultimate choice for applications dominated by severe, unrelenting abrasive wear**. Its **high-carbon, high-chromium chemistry** is meticulously engineered to produce a **dense, interconnected network of hard carbides** within a supporting martensitic matrix, yielding **exceptional hardness and unparalleled resistance to material loss through abrasion**. While its low impact toughness necessitates careful application engineering to avoid brittle fracture, its performance in controlled, high-pressure grinding and sliding wear environments is unmatched among its peer grades. For components like grinding mill liners and slurry pump casings, where maximizing time between replacements directly drives operational efficiency and cost, Class II Type C delivers a reliable, high-performance solution justified by its extended service life. -:- For detailed product information, please contact sales. -: Class II Type C 15% Cr-Mo-HC Martensitic White Cast Iron Specification Dimensions Size： Diameter 20-1000 mm Length <6495 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. -: Class II Type C 15% Cr-Mo-HC Martensitic White Cast Iron Properties -:- For detailed product information, please contact sales. -:

Applications of Class II Type C 15% Cr-Mo-HC Martensitic White Cast Iron Flange -:- For detailed product information, please contact sales. -: Chemical Identifiers Class II Type C 15% Cr-Mo-HC Martensitic White Cast Iron Flange -:- For detailed product information, please contact sales. -:

Packing of Class II Type C 15% Cr-Mo-HC Martensitic White Cast Iron 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 2966 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