Kennametal Stellite,Delcrome® 90 White Cast Iron Tube,Pipe

Kennametal Stellite Delcrome® 90 White Cast Iron Tube Product Information -:- For detailed product information, please contact sales. -: Kennametal Stellite Delcrome® 90 White Cast Iron Tube Synonyms -:- For detailed product information, please contact sales. -:

Kennametal Stellite Delcrome® 90 White Cast Iron Product Information -:- For detailed product information, please contact sales. -: # **Kennametal Stellite Delcrome® 90 White Cast Iron** ## **1. Product Overview** **Kennametal Stellite Delcrome® 90** is a premium **high-chromium white cast iron** engineered specifically for extreme abrasion resistance in the most demanding industrial environments. As part of the renowned **Delcrome® family** of abrasion-resistant alloys, Delcrome® 90 represents a high-performance variant formulated to deliver superior wear life under severe sliding abrasion, impact-abrasion, and erosive conditions. The designation "90" indicates its target **as-cast hardness range** and positions it as a robust alternative to standard high-chromium irons where enhanced performance is required. This alloy combines a high volume fraction of hard chromium carbides with a carefully balanced matrix to provide exceptional resistance to material loss in applications involving minerals, ores, cement, and other highly abrasive media. It is particularly valued in industries where equipment downtime and replacement costs are critical operational factors. --- ## **2. Chemical Composition** Delcrome® 90 features a carefully calibrated high-chromium chemistry that optimizes both carbide formation and matrix properties. Its composition is tailored to maximize abrasion resistance while maintaining sufficient toughness for demanding service. | Element | Typical Composition (%) | Primary Metallurgical Function | | :--- | :--- | :--- | | **Carbon (C)** | 2.8 - 3.5 | Primary carbide former; controls volume and type of carbides (M₇C₃) formed. | | **Chromium (Cr)** | 22.0 - 28.0 | Forms hard, abrasion-resistant chromium carbides (M₇C₃ type); provides oxidation and corrosion resistance. | | **Molybdenum (Mo)** | 1.0 - 2.5 | Enhances hardenability, refines microstructure, and improves elevated temperature stability. | | **Nickel (Ni)** | 0.5 - 1.5 | Austenite stabilizer; promotes martensitic transformation upon cooling in heavy sections. | | **Manganese (Mn)** | 0.5 - 1.5 | Aids hardenability and counteracts sulfur embrittlement. | | **Silicon (Si)** | 0.3 - 1.0 | Deoxidizer; controlled to avoid graphite formation. | | **Copper (Cu)** | 0 - 1.2 | Optional addition to enhance corrosion resistance in certain environments. | | **Sulfur (S)** | ≤ 0.05 | Impurity control. | | **Phosphorus (P)** | ≤ 0.05 | Impurity control. | **Microstructural Characteristics:** - **Carbide Phase:** 30-40% volume fraction of **primary and eutectic chromium carbides (M₇C₃)**. These carbides are blocky, hard (1300-1800 HV), and provide the primary wear-resistant mechanism. - **Matrix Structure:** Primarily **martensitic** with possible secondary carbides, achieved through proper cooling or heat treatment. Some retained austenite may be present depending on section size and cooling rate. - **Carbide Distribution:** Uniform dispersion of carbides in the matrix, creating a composite-like structure resistant to cutting and gouging wear. --- ## **3. Physical & Mechanical Properties** #### **Physical Properties:** - **Density:** ~7.6 - 7.7 g/cm³ - **Melting Range:** ~1250 - 1350 °C - **Thermal Conductivity:** Low (~18 - 25 W/m·K) - **Coefficient of Thermal Expansion:** 9.5 - 10.5 × 10⁻⁶ /°C (20-400°C) #### **Mechanical Properties (As-Cast or Heat-Treated):** - **Hardness:** **58 - 65 HRC (600 - 750 HB)**. The high carbide content ensures this hardness is maintained under severe abrasive conditions. - **Abrasion Resistance (ASTM G65):** **Excellent.** Superior to lower-alloyed white irons and many quenched steels. Relative wear resistance is typically 2-4 times that of ASTM A532 Class I (Ni-Hard I) materials. - **Compressive Strength:** Very High (> 2000 MPa) - **Tensile Strength:** 400 - 600 MPa (Brittle material; tensile strength is not a primary design criterion) - **Impact Toughness (Charpy Unnotched):** 5 - 15 J. **Low impact resistance** – the primary trade-off for extreme abrasion resistance. - **Fracture Toughness:** Low. Susceptible to cracking from thermal shock or point impact loads. - **Modulus of Elasticity:** 200 - 210 GPa #### **Heat Treatment:** While often used in the as-cast condition, properties can be optimized with heat treatment: 1. **Stress Relieving:** Recommended to reduce casting stresses (e.g., 450-500°C). 2. **Destabilization Heat Treatment:** Heating to 950-1000°C followed by air cooling can transform the matrix to martensite, increasing overall hardness and abrasion resistance. 3. **Tempering:** Often performed after destabilization (200-300°C) to relieve stresses without significantly reducing hardness. --- ## **4. Product Applications** Delcrome® 90 is specified for components subjected to severe abrasive wear across several heavy industries: * **Mining & Mineral Processing:** * **Slurry Pump Wear Parts:** Impellers, liners, throatbushes for handling abrasive ores (iron, copper, gold). * **Crusher Components:** Cone crusher mantles/concaves, jaw plates (for specific applications). * **Grinding Mill Components:** Ball mill liners (for some ores), chute liners. * **Cement Industry:** * **Vertical Roller Mill (VRM) Parts:** Roller tires and table segments for clinker grinding. * **Crusher Hammers** for clinker, **Cooler Grate Plates**. * **Power Generation (Coal-Fired):** * **Pulverizer Rolls/Tires,** bottom ash system components. * **Dredging & Sand Processing:** * **Cutter Head Teeth,** suction mouthpieces, pump casings. * **Shot Blasting:** * **Blast Wheel Liners** and impellers. --- ## **5. International & Relevant Standards** Delcrome® 90 is a proprietary Kennametal Stellite alloy. Its composition and performance align with or exceed several key international standards for high-chromium abrasion-resistant cast irons. **Primary Reference Standards:** * **ASTM A532/A532M:** *Standard Specification for Abrasion-Resistant Cast Irons*. Delcrome® 90 corresponds most closely to **Class III Type A** (nominally 23-28% Cr, 1.5-3.0% Mo). It is considered a high-quality, proprietary version of this class. * **ISO 21988:** *Abrasion-resistant cast irons*. Comparable to grades such as **GX 300 CrMo 27 1**. * **DIN EN 12513:** *Founding — Abrasion resistant cast irons*. Equivalent to grade **G-X 300 CrMo 27 1**. * **JIS G5511:** *High chromium cast irons for abrasion resistance*. **Application & Testing Standards:** * **ASTM G65:** Standard test for dry sand/rubber wheel abrasion. * **ASTM E384:** Standard for microindentation hardness (for carbide/matrix evaluation). **Kennametal Stellite Specifications:** The alloy is typically supplied against **Kennametal's internal material specifications** (e.g., **DSM 90** or similar), which guarantee chemical composition, hardness, and microstructural quality. These proprietary specs often ensure tighter control and higher performance than minimum standard requirements. --- ## **6. Advantages, Limitations & Design Considerations** #### **Key Advantages:** 1. **Superior Abrasion Resistance:** Outstanding performance in high-stress abrasion environments due to high-volume, hard chromium carbides. 2. **Good Corrosion/Oxidation Resistance:** The high chromium content provides better resistance to oxidation and mild corrosion compared to low-alloy white irons, beneficial in wet or acidic slurries. 3. **High Compressive Strength:** Resists deformation under heavy crushing loads. #### **Important Limitations:** 1. **Low Toughness:** Cannot withstand heavy, repeated impact. Brittle fracture is the dominant failure mode under impact loading. 2. **Poor Machinability:** Can only be finished by grinding. **Components must be cast to very near final shape.** 3. **Poor Thermal Shock Resistance:** Prone to cracking with rapid temperature changes (>50°C/min gradient). 4. **High Density:** Results in heavier components. #### **Design & Application Guidelines:** * **Avoid Tensile/Impact Loading:** Design for pure compression or moderate stress. * **Robust Support:** Components should be firmly and uniformly supported (e.g., in rubber or epoxy backing) to prevent flexure. * **Generous Radii:** All corners and section changes must have large fillet radii to minimize stress concentration. * **Uniform Sections:** Minimize drastic changes in wall thickness to prevent shrinkage defects and cracking. * **Thermal Management:** Avoid rapid heating or cooling during service or welding repairs (specialized procedures required). * **Consultation Recommended:** Engagement with Kennametal Stellite application engineers is strongly advised for component design and alloy selection. --- ## **7. Comparison with Other Delcrome® Grades** * **vs. Delcrome® 50/60:** Delcrome® 90 has significantly higher chromium and carbide content, offering superior abrasion resistance but lower toughness. * **vs. Delcrome® 100/Plus:** Delcrome® 90 may offer a better balance of wear resistance and cost for many applications, where the ultra-high carbide volume of Delcrome® 100 is not required. * **Positioning:** Delcrome® 90 is positioned as a **high-performance workhorse** for severe abrasion, offering a reliable and proven solution. --- ## **Conclusion** **Kennametal Stellite Delcrome® 90** is a high-performance, high-chromium white cast iron that delivers exceptional service life in severe abrasive wear applications. By leveraging a proven metallurgical formula supported by Kennametal's foundry and application expertise, it provides a reliable solution to extend component life and reduce total operating costs in mining, cement, and power industries. While its inherent brittleness requires careful design and handling, its unparalleled abrasion resistance in suitable applications makes it a preferred material choice for critical wear components. For optimal performance, it should be specified with clear application parameters and in collaboration with Kennametal Stellite's technical team to ensure proper design, manufacturing, and installation. -:- For detailed product information, please contact sales. -: Kennametal Stellite Delcrome® 90 White Cast Iron Specification Dimensions Size： Diameter 20-1000 mm Length <6645 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. -: Kennametal Stellite Delcrome® 90 White Cast Iron Properties -:- For detailed product information, please contact sales. -:

Applications of Kennametal Stellite Delcrome® 90 White Cast Iron Tube -:- For detailed product information, please contact sales. -: Chemical Identifiers Kennametal Stellite Delcrome® 90 White Cast Iron Tube -:- For detailed product information, please contact sales. -:

Packing of Kennametal Stellite Delcrome® 90 White Cast Iron Tube -:- 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 Tube 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 3116 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