Schmolz + Bickenbach,Thermodur® 2343 EFS Extra Fine Structure (H-11)- Hot Work Die Steel Flange

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." -:- For detailed product information, please contact sales. -: Schmolz + Bickenbach Thermodur® 2343 EFS Extra Fine Structure (H-11)- Hot Work Die Steel Flange Product Information -:- For detailed product information, please contact sales. -: Schmolz + Bickenbach Thermodur® 2343 EFS Extra Fine Structure (H-11)- Hot Work Die Steel Flange Synonyms -:- For detailed product information, please contact sales. -:

Schmolz + Bickenbach Thermodur® 2343 EFS Extra Fine Structure (H-11)- Hot Work Die Steel Product Information -:- For detailed product information, please contact sales. -: # **SCHMOLZ + BICKENBACH Thermodur® 2343 EFS (Extra Fine Structure) | Premium Hot Work Die Steel (H-11 Type)** ## **Overview** SCHMOLZ + BICKENBACH **Thermodur® 2343 EFS (Extra Fine Structure)** is a premium-grade, chromium-based hot work die steel representing the pinnacle of metallurgical refinement for the AISI H11 (DIN 1.2343) alloy class. The **"EFS"** designation signifies production via advanced secondary refining processes—most notably **Electroslag Remelting (ESR)**—resulting in an exceptionally homogeneous, isotropic microstructure with ultra-fine grain size and minimal non-metallic inclusions. This material is engineered for the most demanding hot work applications where **superior thermal fatigue resistance, high-temperature toughness, and consistent performance** are critical to die life and process reliability. ## **Key Features:** * **Extra Fine Structure (EFS):** Achieved through ESR refining, delivering unmatched microstructural homogeneity, isotropy, and cleanliness, directly translating to improved mechanical properties and die life. * **Exceptional Thermal Fatigue Resistance (Heat Checking):** The optimized 5% Cr-Mo-V chemistry combined with the fine structure provides outstanding resistance to the initiation and propagation of thermal cracks under cyclic heating/cooling. * **High Toughness at Elevated Temperatures:** Maintains excellent impact strength and fracture toughness even at operating temperatures up to 600°C (1112°F), crucial for withstanding mechanical and thermal shocks. * **Good Wear Resistance & Hot Hardness:** Retains sufficient hardness at high temperatures to resist erosion, soldering, and deformation. * **High Thermal Conductivity:** Facilitates efficient heat extraction from the die surface, reducing thermal gradients and associated stresses. * **Excellent Polishability & Machinability:** The clean, fine structure allows for superior surface finishes and more predictable machining behavior compared to conventionally produced H11. * **Minimal Distortion:** Predictable and uniform response during heat treatment due to the isotropic nature of the ESR material. --- ## **Material Specifications: Thermodur® 2343 EFS** ### **1. Chemical Composition (wt%)** | Element | Content Range (wt%) | Function & Benefit in Hot Work | | :--- | :--- | :--- | | **Carbon (C)** | 0.37 - 0.42 | Provides base hardness and strength. Balanced for optimal toughness. | | **Silicon (Si)** | 0.90 - 1.20 | Increases tempering resistance and high-temperature strength. Enhances oxidation resistance. | | **Manganese (Mn)** | 0.30 - 0.50 | Supports hardenability and strength. | | **Chromium (Cr)** | 4.80 - 5.50 | **Primary alloying element.** Provides hardenability, high-temperature strength, and resistance to oxidation & softening. | | **Molybdenum (Mo)** | 1.20 - 1.50 | Enhances hardenability, hot strength, and resistance to tempering. Mitigates temper embrittlement. | | **Vanadium (V)** | 0.30 - 0.50 | Forms fine, stable carbides that increase wear resistance, hot hardness, and grain refinement. | | **Sulfur (S)** | **≤ 0.005** (EFS) | **Extremely Low.** Essential for maximizing transverse toughness and polishability. | | **Phosphorus (P)** | **≤ 0.015** (EFS) | **Very Low.** Minimized to prevent embrittlement. | **The "EFS" Metallurgical Advantage (ESR Process):** * **Dramatic Inclusion Reduction:** Sulfides and oxides are reduced to minimal levels, eliminating potential initiation sites for fatigue cracks. * **Extreme Chemical Homogeneity:** Eliminates micro-segregation (dendritic structure), ensuring uniform properties throughout the die block. * **Fine, Equiaxed Grain Structure:** Results in superior toughness and ductility in all directions (isotropy). * **Improved Density:** Reduces micro-porosity, enhancing thermal fatigue life and polishability. ### **2. Physical & Mechanical Properties** #### **Properties in Annealed Condition:** * **Hardness:** ~210 HB (max) * **Microstructure:** Spheroidized carbides in ferritic matrix. * **Machinability:** Good (for its alloy class). #### **Properties in Hardened & Tempered Condition (Typical for Hot Work):** | Tempering Temperature | Hardness (HRC) | 0.2% Yield Strength (MPa) | Tensile Strength (MPa) | Impact Toughness (KV, J) | | :--- | :--- | :--- | :--- | :--- | | **540-560°C** | 48 - 50 | ~1450 - 1600 | ~1650 - 1800 | 35 - 45 | | **580-600°C** | 44 - 46 | ~1250 - 1400 | ~1450 - 1600 | 40 - 55 | | **620-640°C** | 40 - 42 | ~1100 - 1250 | ~1300 - 1450 | 50 - 65 | #### **High-Temperature Properties (Key Performance Data):** | Temperature | Hot Hardness (HV) | 0.2% Yield Strength (MPa) | Retained Room-Temp Hardness | | :--- | :--- | :--- | :--- | | **400°C** | ~450 - 480 | ~1000 - 1150 | ~85% | | **500°C** | ~380 - 420 | ~700 - 850 | ~70% | | **600°C** | ~300 - 340 | ~450 - 550 | ~55% | #### **Thermal & Physical Properties:** * **Density:** 7.80 g/cm³ * **Thermal Conductivity:** **~28 W/m·K** (at 20°C) – Higher than many hot work steels, aiding heat transfer. * **Coefficient of Thermal Expansion:** 11.5 x 10⁻⁶ /K (20-400°C) * **Modulus of Elasticity:** 210 GPa * **Specific Heat Capacity:** 460 J/kg·K ### **3. Special Performance Characteristics** * **Thermal Fatigue Resistance:** The **EFS structure is the defining advantage**. The fine, clean microstructure dramatically increases the number of cycles before heat checking initiates, often providing **20-40% longer life** than conventional H11 in cyclic thermal applications. * **Isotropic Toughness:** Transverse impact values are nearly identical to longitudinal values, a critical feature for dies loaded in multiple directions. * **Polishability:** Capable of achieving very fine surface finishes, reducing sticking and improving part release. ### **4. Machining & Finishing** * **Machining (Annealed):** Good. Use positive geometry carbide tools. * **EDM:** Excellent performance. The clean structure allows for stable machining and good surface integrity. * **Grinding:** Very good. Use appropriate wheels and avoid excessive heat input. * **Polishing:** Excellent for a hot work steel. Can achieve fine finishes to reduce soldering and sticking. --- ## **International Standards & Cross-References** | Standard | Designation | Note | | :--- | :--- | :--- | | **SCHMOLZ + BICKENBACH** | **Thermodur® 2343 EFS** | Proprietary premium grade. | | **DIN / EN / W-Nr.** | **1.2343** (ESR Quality) | Base standard. "EFS" denotes the highest quality tier. | | **AISI / ASTM** | **H11** | Standard equivalent. | | **ISO 4957** | **X37CrMoV5-1** | | | **Uddeholm** | **ORVAR® 2M** (ESR Microdized) | Direct competitor, similar ESR-refined H11. | | **Böhler / voestalpine** | **W302** (ESR) | | | **Japanese (JIS)** | **SKD6** | | | **Chinese (GB)** | **4Cr5MoSiV1** | | --- ## **Heat Treatment Guidelines** 1. **Soft Annealing:** 840-860°C, slow cool in furnace. Hardness ≤ 210 HB. 2. **Stress Relieving (after rough machining):** 650-700°C. 3. **Preheating:** Essential. Stage at 500°C and 850°C. 4. **Austenitizing (Hardening):** * **Temperature:** **1000-1030°C.** Use vacuum or controlled atmosphere. * **Soak Time:** 20-30 min per 25mm thickness. 5. **Quenching:** In **air** (for simple shapes) or **high-pressure gas** (vacuum furnace, preferred for complex shapes and minimal distortion). 6. **Tempering:** * **Must be performed immediately** after quenching. * **Temperature:** Typically **540-640°C** (depending on required hardness/toughness balance). * **Double or Triple Tempering is mandatory.** Hold for at least 2 hours per temper, air cooling between tempers. * **Note:** A slight secondary hardness peak occurs around 500-550°C. --- ## **Product Applications** Thermodur® 2343 EFS is designed for **high-stress, high-temperature tooling** where thermal fatigue is the primary failure mode. **Primary Application Areas:** * **Aluminum Die Casting:** Core pins, ejector pins, shot sleeves, gooseneck nozzles, inserts for high-stress areas. Especially suited for thin-wall casting with high cycle rates. * **Hot Forging Dies:** Inserts for hammer and press forging of steels and non-ferrous alloys. Punches, dies, and wear rings. * **Hot Extrusion Tools:** Dies and mandrels for aluminum and copper alloys. * **Hot Stamping (Press Hardening) Dies:** Tools for forming ultra-high-strength steel (UHSS) components. * **Plastic Molds for High-Temperature Engineering Plastics:** E.g., PEEK, PEI. Runner systems and hot manifold plates. * **Glass Molding Tools.** **Ideal for Dies Experiencing:** * Severe thermal cycling (rapid heating/cooling). * High mechanical/thermal shock. * Where die failure is due to heat checking (crazing) rather than gross wear or plastic deformation. **Less Suitable for:** Applications requiring extreme wear resistance or operating continuously above 650°C, where higher-alloyed steels like H13 (1.2344) or nickel-based alloys might be better. --- ## **Why Choose 2343 EFS over Standard H11/H13?** * **vs. Standard H11:** The **EFS** refinement provides significantly better thermal fatigue life, toughness, and consistency. It is a direct, superior upgrade. * **vs. H13 (1.2344):** H13 has higher V content for more wear resistance but slightly lower toughness and thermal conductivity. **2343 EFS is often preferred where thermal fatigue and toughness are more critical than pure abrasion resistance.** Its higher thermal conductivity is also beneficial for heat extraction. **Selection Rule of Thumb:** For dies failing primarily from **heat checking**, choose **2343 EFS**. For dies failing from **abrasion or gross softening**, a higher vanadium grade like H13 may be considered. --- **Disclaimer:** The information provided is based on typical data for SCHMOLZ + BICKENBACH Thermodur® 2343 EFS. Properties can vary within specification ranges and are highly dependent on precise heat treatment. This document is for informational purposes only and does not constitute a guarantee. For critical applications, always consult the official manufacturer's documentation. The "EFS" quality is essential for achieving the stated performance advantages, particularly in thermal fatigue resistance. -:- For detailed product information, please contact sales. -: Schmolz + Bickenbach Thermodur® 2343 EFS Extra Fine Structure (H-11)- Hot Work Die Steel Specification Dimensions Size： Diameter 20-1000 mm Length <7129 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. -: Schmolz + Bickenbach Thermodur® 2343 EFS Extra Fine Structure (H-11)- Hot Work Die Steel Properties -:- For detailed product information, please contact sales. -:

Applications of Schmolz + Bickenbach Thermodur® 2343 EFS Extra Fine Structure (H-11)- Hot Work Die Steel Flange -:- For detailed product information, please contact sales. -: Chemical Identifiers Schmolz + Bickenbach Thermodur® 2343 EFS Extra Fine Structure (H-11)- Hot Work Die Steel Flange -:- For detailed product information, please contact sales. -:

Packing of Schmolz + Bickenbach Thermodur® 2343 EFS Extra Fine Structure (H-11)- Hot Work Die Steel Flange -:- 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 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 3600 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