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."
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International Mold Steel Flange DH2F Pre-Hardened H13-Type Mold Steel Flange Product Information
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International Mold Steel Flange DH2F Pre-Hardened H13-Type Mold Steel Flange Synonyms
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International Mold Steel DH2F Pre-Hardened H13-Type Mold Steel Product Information
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**Product Introduction: DH2F Pre-Hardened H13-Type Hot Work Mold Steel**
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### **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.
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### **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.
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### **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. |
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### **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.
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### **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.
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### **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.
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**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.**
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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
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International Mold Steel DH2F Pre-Hardened H13-Type Mold Steel Properties
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Applications of International Mold Steel Flange DH2F Pre-Hardened H13-Type Mold Steel Flange
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Chemical Identifiers International Mold Steel Flange DH2F Pre-Hardened H13-Type Mold Steel Flange
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Packing of International Mold Steel Flange DH2F Pre-Hardened H13-Type Mold Steel Flange
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Standard Packing:
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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 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
