International Mold Steel Tube,Pipe,DH2F Pre-Hardened H13-Type Mold Steel Tube,Pipe

International Mold Steel Tube DH2F Pre-Hardened H13-Type Mold Steel Tube Product Information -:- For detailed product information, please contact sales. -: International Mold Steel Tube DH2F Pre-Hardened H13-Type Mold Steel Tube Synonyms -:- For detailed product information, please contact sales. -:

International Mold Steel DH2F Pre-Hardened H13-Type Mold Steel Product Information -:- For detailed product information, please contact sales. -: **Product Introduction: DH2F Pre-Hardened H13-Type Hot Work Mold Steel** --- ### **1. Overview** **DH2F** is a premium **pre-hardened, chromium-molybdenum-vanadium hot work tool steel** specifically formulated as an enhanced, ready-to-use alternative to conventional AISI H13 (1.2344). It is supplied in a **quenched and tempered (pre-hardened) condition** with a uniform hardness of approximately **37-42 HRC**, eliminating the need for final heat treatment by the toolmaker. This alloy offers superior **high-temperature strength, thermal fatigue resistance, and toughness** compared to standard P20-type steels, making it the material of choice for demanding plastic injection molds, aluminum die-casting dies, and other hot work applications. DH2F retains the core performance characteristics of H13 while providing the time-saving and distortion-reducing benefits of a pre-hardened steel. --- ### **2. International Standards & Specifications** DH2F is a proprietary grade designed to meet or exceed the requirements of standard H13-type steels, with enhanced consistency and pre-hardened delivery. * **Primary Manufacturer Standard:** * **International Mold Steel (IMS) DH2F:** Proprietary specification for pre-hardened H13-type steel. * **Key International Equivalents (Base H13 Chemistry):** * **AISI H13 (UNS T20813):** American standard hot work tool steel. * **DIN 1.2344 / 1.2343:** The most common European designation (X40CrMoV5-1). * **JIS G4404 SKD61:** Japanese standard for hot work die steel. * **ISO 4957 X40CrMoV5-1:** International classification. * **Industry Position:** DH2F is positioned as a **high-quality, pre-hardened version of 1.2344/SKD61**, often featuring improved cleanliness (via processes like ESR or VAR) and guaranteed through-hardness in large sections. --- ### **3. Chemical Composition (Weight %, Typical)** The chemistry is optimized for high-temperature stability, resistance to thermal softening, and thermal fatigue cracking. | Element | Typical Range (%) | Role & Benefit | | :--- | :--- | :--- | | **Carbon (C)** | 0.35 – 0.42 | Provides base hardness, wear resistance, and high-temperature strength. | | **Chromium (Cr)** | 4.80 – 5.50 | **Primary alloy.** Confers high tempering resistance ("red hardness"), oxidation resistance, and promotes deep hardenability. | | **Molybdenum (Mo)** | 1.20 – 1.60 | Enhances hardenability, high-temperature strength, and toughness; reduces susceptibility to temper embrittlement. | | **Vanadium (V)** | 0.85 – 1.15 | **Key alloy.** Forms hard, stable vanadium carbides (VC) that provide excellent wear resistance, grain refinement, and secondary hardening during tempering. | | **Silicon (Si)** | 0.80 – 1.20 | Improves oxidation resistance and strengthens the ferrite matrix. | | **Manganese (Mn)** | 0.30 – 0.60 | Enhances hardenability and strength. | | **Sulfur (S)** | ≤ 0.005 (Low) | Kept very low to maximize **toughness, polishability, and weldability**—critical for die-casting and high-performance mold applications. | --- ### **4. Typical Physical & Mechanical Properties (As Pre-Hardened)** * **Delivery Condition:** Quenched and tempered (Pre-hardened). * **Hardness:** **37 – 42 HRC** (typical: ~40 HRC). Uniform through large cross-sections. * **Tensile Strength:** ~ 1250 – 1400 MPa (181,000 – 203,000 psi) * **Yield Strength (0.2% Offset):** ~ 1100 – 1250 MPa (160,000 – 181,000 psi) * **Impact Toughness (Charpy V-Notch):** Typically ≥ 25 J (18 ft-lb) at room temperature – **Excellent for its hardness.** * **Density:** 7.80 g/cm³ * **Modulus of Elasticity:** ~ 210 GPa (30.5 x 10⁶ psi) * **Thermal Conductivity:** ~ 24 W/m·K (at 20°C) – Higher than many tool steels, aiding in heat dissipation. * **Coefficient of Thermal Expansion:** ~ 11.5 x 10⁻⁶ /K (20-100°C) * **Key High-Temperature Property:** High resistance to **thermal softening** (maintains hardness at elevated temperatures) and excellent **thermal fatigue resistance** (resistance to heat checking). * **Machinability:** **Fair to Good** (in pre-hardened state). More challenging than P20 due to higher hardness and alloy content. Requires rigid setups and appropriate tooling. * **Polishability:** **Excellent.** Achieves very fine, mirror-like finishes (SPI #A1) due to its homogeneous, fine-grained structure. * **Weldability:** **Good** (with proper procedure). Requires pre-heat (~300-400°C) and post-weld tempering. Use matching or recommended hot work tool steel electrodes. --- ### **5. Product Application** DH2F is specified for demanding tooling applications involving high temperatures, thermal cycling, and wear. * **Aluminum, Magnesium, & Zinc Die-Casting Dies:** * **Cavities, Cores, Slides, and Inserts** – Core application. * **Shot Sleeves and Nozzles.** * **Ejector Pins** (in hardened and tempered condition). * **Plastic Injection Molds:** * **Molds for High-Temperature Engineering Plastics** (PEEK, PPS, PEI, etc.). * **Hot Runner Manifolds and Nozzles.** * **Molds for Abrasive or Corrosive Plastics** (e.g., filled resins, PVC). * **Hot Forging Dies & Extrusion Dies:** For brass, aluminum, and steel. * **General Hot Work Tooling:** Used in various applications requiring resistance to heat checking and thermal fatigue. --- ### **6. Key Features & Advantages** * **Eliminates Heat Treatment Risk:** Supplied ready-to-machine, avoiding the distortion, cracking, and decarburization risks associated with quenching large, complex H13 tools. * **Superior Thermal Fatigue Resistance:** Outstanding resistance to the initiation and growth of heat-check cracks, extending die life in cyclic heating applications like die casting. * **Excellent Toughness:** High impact strength reduces the risk of catastrophic failure or chipping, even in pre-hardened condition. * **High Temper Resistance ("Red Hardness"):** Maintains hardness and strength at operating temperatures up to approximately **550°C (1022°F)**, far exceeding the capability of P20 steels. * **Exceptional Polishability & Texture Transfer:** Produces superior surface finishes, ideal for cosmetic parts and detailed textures. * **Good Thermal Conductivity:** Helps dissipate heat from the mold surface, contributing to faster cycle times. * **Isotropic Properties:** Advanced melting practices ensure uniform properties in all directions, crucial for predictable performance. --- **In summary, International Mold Steel DH2F is a high-performance, pre-hardened hot work steel that brings the elevated temperature capabilities of H13/SKD61 to the mold maker in a convenient, low-risk, ready-to-machine form. It is the ideal choice for demanding applications where thermal fatigue, wear resistance, and high polishability are critical, providing a significant productivity advantage over conventionally heat-treated H13.** -:- For detailed product information, please contact sales. -: International Mold Steel DH2F Pre-Hardened H13-Type Mold Steel Specification Dimensions Size： Diameter 20-1000 mm Length <7027 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 DH2F Pre-Hardened H13-Type Mold Steel Properties -:- For detailed product information, please contact sales. -:

Applications of International Mold Steel Tube DH2F Pre-Hardened H13-Type Mold Steel Tube -:- For detailed product information, please contact sales. -: Chemical Identifiers International Mold Steel Tube DH2F Pre-Hardened H13-Type Mold Steel Tube -:- For detailed product information, please contact sales. -:

Packing of International Mold Steel Tube DH2F Pre-Hardened H13-Type Mold Steel 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 3498 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