MetalTek,MTEK HC-225 UNS F45005 Abrasion Resistant Cast Iron Sheet,Plate

MetalTek MTEK HC-225 UNS F45005 Abrasion Resistant Cast Iron Sheet/Plate Product Information -:- For detailed product information, please contact sales. -: MetalTek MTEK HC-225 UNS F45005 Abrasion Resistant Cast Iron Sheet/Plate Synonyms -:- For detailed product information, please contact sales. -:

MetalTek MTEK HC-225 UNS F45005 Abrasion Resistant Cast Iron Product Information -:- For detailed product information, please contact sales. -: # **MetalTek MTEK HC-225 (UNS F45005) High-Chromium, High-Carbon Abrasion Resistant White Cast Iron** ## **1. Product Overview** **MetalTek MTEK HC-225**, standardized under **UNS F45005**, represents an ultra-high-performance **high-chromium, high-carbon white cast iron** engineered for the most severe abrasion and erosion-wear applications. The designation "HC-225" indicates its core characteristics: **High-Chromium** alloy with a target **minimum hardness of 225 HB above standard Class III alloys**, effectively achieving **63-67 HRC (700-825 HB)**. This alloy delivers superior wear life through a microstructure dominated by a high volume fraction of ultra-hard chromium carbides in a fully martensitic matrix. This material is specifically formulated for applications where standard high-chromium irons (like Class III Type A) reach their performance limits, offering extended service life in extreme abrasive environments involving high-stress grinding, gouging, and severe impact-abrasion. ## **2. Chemical Composition** MTEK HC-225 features a carefully optimized chemical composition that pushes the boundaries of carbide formation and matrix hardness. It exceeds the standard ranges of conventional Class III alloys. | Element | Composition Range (%) | Functional Role | |---------|----------------------|-----------------| | **Carbon (C)** | 3.4 – 4.0 | Primary carbide former. This elevated carbon content maximizes the volume fraction of hard **M₇C₃ carbides**, directly enhancing abrasion resistance. | | **Chromium (Cr)** | 24.0 – 28.0 | Forms the primary wear-resistant **chromium carbides (M₇C₃)**. Provides oxidation and mild corrosion resistance. The high Cr/C ratio ensures carbide stability. | | **Molybdenum (Mo)** | 2.0 – 3.5 | Enhances hardenability, refines the matrix, and forms secondary carbides for improved high-temperature stability and toughness. | | **Nickel (Ni)** | 0.8 – 2.0 | Strong austenite stabilizer. Ensures complete martensitic transformation upon heat treatment by suppressing pearlite formation, especially in heavy sections. | | **Manganese (Mn)** | 0.8 – 1.5 | Auxiliary austenite stabilizer and deoxidizer. Supports hardenability. | | **Silicon (Si)** | 0.3 – 0.8 | Deoxidizer during melting. Kept low to avoid graphitization and to promote carbide stability. | | **Copper (Cu)** | 0 – 1.5 | Optional addition to enhance corrosion resistance in certain slurry applications and supplement hardenability. | | **Sulfur (S)** | ≤ 0.05 | Impurity control. | | **Phosphorus (P)** | ≤ 0.05 | Impurity control. | **Key Microstructural Feature:** The microstructure consists of **35-45% volume fraction of primary and eutectic chromium carbides (M₇C₃)** embedded in a fully **martensitic matrix** with minimal retained austenite. The carbides are large, blocky, and densely packed, providing the primary wear-resistant phase. ## **3. Physical & Mechanical Properties** ### **Physical Properties:** * **Density:** ≈ 7.65 – 7.75 g/cm³ * **Melting Point:** ≈ 1220 – 1280 °C * **Thermal Conductivity:** Low, ~18 – 22 W/m·K * **Coefficient of Thermal Expansion:** 9.0 – 10.0 x 10⁻⁶ /°C (20-400°C) ### **Mechanical Properties (Heat-Treated Condition):** * **Macro-Hardness:** **63 – 67 HRC** (Typical), **700 – 825 HBW** (Minimum guaranteed values are customer-specified, often > 700 HB). * **Abrasion Resistance (ASTM G65):** **Exceptional, 15-30% superior** to standard UNS F45000 (Class III Type A) grades under high-stress conditions. The high carbide volume provides unmatched resistance to cutting and gouging wear. * **Compressive Strength:** Extremely High (> 2300 MPa). Excellent resistance to deformation under crushing loads. * **Tensile Strength:** 500 – 700 MPa. Low ductility; not a primary design factor. * **Impact Toughness (Charpy Unnotched):** **Very Low, 3 – 10 J.** This is the critical trade-off for extreme abrasion resistance. The material is highly brittle. * **Fracture Toughness (K_IC):** Very Low. Highly susceptible to crack propagation from defects or impact. * **Modulus of Elasticity:** 200 – 210 GPa. ### **Heat Treatment:** Supplied exclusively in the heat-treated condition. The process is critical to achieving the martensitic matrix: 1. **Destabilization Austenitizing:** Heated to 970 – 1020°C. This allows carbon from the carbides to diffuse into the austenite matrix, enriching it. 2. **Quenching:** Air quenching or controlled forced-air cooling. The enriched austenite transforms to high-carbon martensite. 3. **Deep Tempering (Multiple Stages):** Tempered at 200 – 450°C (often in multiple cycles) to relieve stresses, transform retained austenite, and achieve the optimal balance of hardness and micro-toughness. ## **4. Product Applications** MTEK HC-225 is specified for the most punishing wear applications where component replacement cost and downtime are critical factors. * **Mining & Mineral Processing (Severe Duty):** * **Slurry Pump Wear Parts:** Impellers, casings, and liners for highly abrasive, high-concentration slurries (e.g., iron ore, tar sands, tailings). * **Crusher Components:** Cone crusher mantles/concaves (tertiary stage), vertical shaft impactor (VSI) tips and anvils. * **Pulverizer & Grinding Mill Parts:** Roller tires and table segments in vertical roller mills for hard ores/cement clinker. * **Cement Industry:** * **Clinker Crusher Hammers,** **Fan Blades** in abrasive gas streams, **Grate Cooler Plates.** * **Power Generation:** * **Coal Pulverizer** grinding elements (rolls, tires) for abrasive coals. * **Bottom Ash Conveyor** components. * **Dredging & Sand Processing:** * **Cutter Head Teeth,** **Suction Pipe Liners,** **Classifier Shoes** in sand classifiers. ## **5. International & Relevant Standards** MTEK HC-225 is a premium, proprietary alloy whose composition exceeds the minimum requirements of common standards but is aligned with their highest-performance categories. **Primary Reference Standards:** * **ASTM A532/A532M:** *Standard Specification for Abrasion-Resistant Cast Irons*. MTEK HC-225 aligns with the upper bounds of **Class III Type A** but with enhanced carbon and alloy content. It is often supplied to a proprietary specification that guarantees higher minimum hardness and performance. * **UNS Designation: F45005.** This designation is part of the Unified Numbering System for metals, grouping it with other high-chromium cast irons. * **ISO 21988:** *Abrasion-resistant cast irons*. Comparable to the highest-carbon variants of grades like **GX 300 CrMo 27 1**. * **DIN EN 12513:** Grade **G-X 300 CrMoNi 27 2-1** is a close reference for composition and application. * **JIS G5511:** Falls under the category of high-chromium cast irons with more than 20% Cr. **Supporting Standards:** * **ASTM G65:** Standard abrasion test method for ranking relative performance. * **ASTM E384:** For microhardness testing of carbides and matrix. * **ASTM E562:** For determining volume fraction of carbides via point count. ## **6. Advantages, Limitations & Design Guidelines** ### **Advantages:** 1. **Maximum Abrasion Resistance:** Arguably the best commercially available cast iron for pure abrasion resistance due to its high carbide volume and matrix hardness. 2. **Excellent Compressive Strength:** Withstands extreme pressure without deformation. 3. **Good Elevated Temperature Stability:** Maintains hardness better than lower-alloyed irons up to ~500°C due to stable carbides. ### **Limitations:** 1. **Extreme Brittleness:** Very low impact and fracture toughness. **Cannot tolerate any significant impact.** 2. **Very Poor Machinability:** Can only be finished by grinding. **Must be cast to final or near-final dimensions.** 3. **High Cost:** Significant raw material cost due to high levels of Cr, Mo, and Ni. 4. **Thermal Shock Sensitivity:** High risk of cracking during rapid heating or cooling. ### **Design & Application Guidelines:** * **Absolute Requirement:** Avoid tensile stresses and impact loading in design. * **Robust Support:** Components must be firmly and uniformly supported by a ductile backing material (e.g., mild steel) to prevent flexure. * **Liberal Radii:** All corners and transitions must have large radii to eliminate stress concentrators. * **Section Thickness Control:** Minimize variations to prevent shrinkage defects and differential cooling stresses. * **Application-Specific Testing:** For new applications, field testing of prototypes is strongly recommended to validate performance against total cost of ownership. * **Consultation with MetalTek:** Essential for component design, pattern engineering, and heat treatment specification to ensure the alloy performs as intended. -:- For detailed product information, please contact sales. -: MetalTek MTEK HC-225 UNS F45005 Abrasion Resistant Cast Iron Specification Dimensions Size： Diameter 20-1000 mm Length <6640 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. -: MetalTek MTEK HC-225 UNS F45005 Abrasion Resistant Cast Iron Properties -:- For detailed product information, please contact sales. -:

Applications of MetalTek MTEK HC-225 UNS F45005 Abrasion Resistant Cast Iron Sheet,Plate -:- For detailed product information, please contact sales. -: Chemical Identifiers MetalTek MTEK HC-225 UNS F45005 Abrasion Resistant Cast Iron Sheet,Plate -:- For detailed product information, please contact sales. -:

Packing of MetalTek MTEK HC-225 UNS F45005 Abrasion Resistant Cast Iron Sheet/Plate -:- 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 Sheet/Plate 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 3111 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