International Mold Steel Sheet,Plate,Daido DRM1 Matrix High-Speed Steel Sheet,Plate

International Mold Steel Sheet/Plate Daido DRM1 Matrix High-Speed Steel Sheet/Plate Product Information -:- For detailed product information, please contact sales. -: International Mold Steel Sheet/Plate Daido DRM1 Matrix High-Speed Steel Sheet/Plate Synonyms -:- For detailed product information, please contact sales. -:

International Mold Steel Daido DRM1 Matrix High-Speed Steel Product Information -:- For detailed product information, please contact sales. -: # **Product Introduction: Daido DRM1 (DEX20) Powder Metallurgy (PM) Matrix High-Speed Steel** ## **1. Overview** **Daido DRM1 (commercial name: DEX20)** is a **high-performance, powder metallurgy (PM) processed, cobalt-free matrix high-speed steel** specifically engineered for demanding cold work and wear-resistant applications. Developed by Daido Steel, it represents an advanced generation of tool steels that utilize PM technology to achieve a **uniform, ultra-fine carbide distribution** within a tough metallic matrix. Unlike conventional high-speed steels (HSS), DRM1 is designed not primarily for hot hardness in cutting tools, but for **exceptional wear resistance, high compressive strength, and superior toughness** in cold forming, blanking, and precision molding applications. Its "matrix steel" designation indicates a microstructure where fine, hard carbides are uniformly dispersed in a ductile steel matrix, providing an optimal balance between abrasion resistance and resistance to chipping or cracking. ## **2. International Standards & Specifications** DRM1 is a proprietary PM steel grade from Daido Steel, with performance characteristics that place it between premium cold work steels and high-speed steels. * **Primary Manufacturer Standard:** * **Daido Steel DRM1 / DEX20:** Proprietary specification for this powder metallurgy matrix steel. * **Material Classification & Comparative Grades:** * **Type:** **Powder Metallurgy High-Speed Steel (PM-HSS)** for cold work applications. * **Performance Equivalent:** Often compared to and positioned as a superior alternative to **AISI M2 (1.3343)** and **AISI D2 (1.2379)** for wear applications, offering better toughness than M2 and better wear resistance than D2. * **International PM Steel Equivalents:** Comparable to other high-end PM cold work steels such as: * **Uddeholm VANADIS 4 Extra** (Sweden) * **Böhler S390 MICROCLEAN** (Austria) * **ASSAB V-4** (Sweden) * **ISO 4957:** Could be classified under alloy tool steel groups, but it is a specific proprietary PM grade. ## **3. Chemical Composition (Weight %, Typical)** The composition is rich in carbide-forming elements to maximize wear resistance, balanced with a moderate carbon content to preserve toughness. | Element | Typical Range (%) | Role & Benefit | | :--- | :--- | :--- | | **Carbon (C)** | 1.90 – 2.10 | High carbon content to form abundant hard carbides (primarily vanadium carbides) for extreme wear resistance. | | **Chromium (Cr)** | 4.50 – 5.50 | Contributes to hardenability, provides some corrosion resistance, and forms chromium carbides. | | **Molybdenum (Mo)** | 3.00 – 4.00 | A primary alloy in M-series HSS. Enhances hardenability, refines grain size, and contributes to secondary hardening. | | **Tungsten (W)** | 6.00 – 7.00 | A key HSS element. Provides solid solution strengthening and forms very hard, stable tungsten carbides, contributing to high wear resistance and "red hardness". | | **Vanadium (V)** | 3.00 – 4.00 | **The critical element.** Forms extremely hard and fine **vanadium carbides (VC)**. These are the primary source of its exceptional abrasion resistance. The PM process allows for a high V content without the large, brittle carbides found in conventionally cast steels. | | **Cobalt (Co)** | 0% (Cobalt-Free) | **Key differentiator.** Its absence makes DRM1 less prone to brittleness than Co-containing HSS grades (like M35, M42), resulting in significantly better toughness for cold work applications. | | **Matrix Composition:** The fine, uniform distribution of these alloy carbides in a tough ferrous matrix is the source of its unique properties. ## **4. Typical Physical & Mechanical Properties (Heat Treated)** * **Recommended Heat Treatment:** * **Preheating:** 800-850°C (1470-1560°F) * **Austenitizing (Hardening):** 1120-1180°C (2050-2155°F) – specific temperature depends on desired balance of hardness and toughness. * **Quenching:** Oil, air, or salt bath. * **Tempering:** **Triple tempering is mandatory.** Typical tempering range: 520-560°C (970-1040°F). Exhibits strong secondary hardening, achieving peak hardness after tempering. * **Mechanical Properties (Hardened & Triple Tempered):** * **Hardness:** **64 – 66 HRC** (typical achievable range). * **Bending Strength:** Very good for its high hardness level, superior to conventional HSS grades like M2 at similar hardness. * **Compressive Strength:** Extremely high (>3000 MPa), suitable for high-pressure forming. * **Impact Toughness (Charpy):** Moderate. While better than conventional HSS grades due to its fine PM structure and lack of cobalt, it is lower than premium cold work steels like DC53. Its strength is in **abrasion resistance, not high impact loads**. * **Abrasion Resistance:** **Exceptional.** Its primary advantage, far exceeding that of D2, DC53, and even conventional M2, due to the high volume fraction of hard vanadium carbides. * **Physical Properties:** * **Density:** ~8.1 g/cm³ * **Modulus of Elasticity:** ~210 GPa * **Thermal Conductivity:** Lower than low-alloy steels, typical for high-alloy HSS. ## **5. Product Application** DRM1 is selected for applications where extreme wear is the primary failure mode and high compressive strength is required. * **Precision Blanking and Punching:** * **Fine Blanking Dies** for thick or hard materials. * **Progressive Die Inserts** (piercing punches, forming inserts) for high-volume stamping of abrasive materials (e.g., electrical steel, pre-plated steel). * **Cold Forming and Extrusion:** * **Cold Heading Dies and Punches** for fasteners. * **Cold Extrusion Punches and Dies** for steel and non-ferrous metals. * **Thread Rolling Dies.** * **Wear Parts and Machine Components:** * **Wear Plates, Guides, and Bushings** in high-abrasion environments. * **Slitter Knives and Shear Blades** for abrasive strips. * **Plastic Injection Molds:** * **Cavities and Cores for Highly Abrasive Plastics** (e.g., glass-filled, mineral-filled, carbon fiber-reinforced polymers). * **Ejector Pins** in abrasive conditions. ## **6. Key Features & Advantages** * **Unmatched Wear/Abrasion Resistance:** The fine, uniformly dispersed vanadium carbides from the PM process provide exceptional resistance to abrasive wear, significantly outperforming conventional tool steels. * **High Compressive Strength and Hardness:** Capable of maintaining a very high hardness (64+ HRC) under extreme pressure without deformation. * **Good Toughness for its Hardness Level:** The PM microstructure and absence of cobalt provide better toughness and resistance to chipping than conventionally processed high-speed steels at equivalent hardness. * **Excellent Grindability and EDM Performance:** Despite its high hardness, the fine, uniform carbide structure makes it easier to grind and machine via EDM than conventional steels with large carbides, resulting in better surface finishes and shorter processing times. * **Good Dimensional Stability:** Exhibits minimal size change during heat treatment compared to some high-alloy steels, allowing for precision tool making. * **Consistent Performance:** The PM manufacturing process eliminates carbide segregation and banding, ensuring isotropic properties and predictable performance in all directions. ## **7. Processing Guidelines** * **Machining (Annealed State):** Machinability is fair; it is more difficult than low-alloy steels. Use carbide tools with positive rakes. * **Grinding:** Use appropriate alumina or CBN wheels. Its PM structure allows for efficient grinding with reduced risk of burning compared to conventional HSS. * **Electrical Discharge Machining (EDM):** Suitable. A stress-relief temper after rough EDM is recommended. * **Heat Treatment:** Requires precise control, especially during austenitizing. Vacuum or protective atmosphere furnaces are strongly recommended to prevent decarburization. **Triple tempering is essential** to achieve optimal properties and transform retained austenite. * **Surface Treatments:** Can be coated with PVD (TiN, TiAlN, CrN) or CVD coatings for even greater performance in specific applications. **Summary:** Daido DRM1 (DEX20) is a high-end, powder metallurgy matrix steel that delivers a specialized set of properties focused on extreme wear resistance and high compressive strength. It is not a general-purpose steel but a strategic choice for applications where abrasive wear is the dominant failure mechanism. By combining the wear resistance of high-speed steel with the improved toughness and consistency of PM technology, it offers a reliable solution for extending the service life of critical cold work tools, punches, dies, and mold components operating under severe abrasive conditions. -:- For detailed product information, please contact sales. -: International Mold Steel Daido DRM1 Matrix High-Speed Steel Specification Dimensions Size： Diameter 20-1000 mm Length <7034 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. -: International Mold Steel Daido DRM1 Matrix High-Speed Steel Properties -:- For detailed product information, please contact sales. -:

Applications of International Mold Steel Sheet,Plate Daido DRM1 Matrix High-Speed Steel Sheet,Plate -:- For detailed product information, please contact sales. -: Chemical Identifiers International Mold Steel Sheet,Plate Daido DRM1 Matrix High-Speed Steel Sheet,Plate -:- For detailed product information, please contact sales. -:

Packing of International Mold Steel Sheet/Plate Daido DRM1 Matrix High-Speed Steel 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 3505 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