InduSteel Flange,CLC 1.2311 Prehardened Mold Steel Flange (300HB/30HRC)

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. -: InduSteel Flange CLC 1.2311 Prehardened Mold Steel Flange (300HB/30HRC) Product Information -:- For detailed product information, please contact sales. -: InduSteel Flange CLC 1.2311 Prehardened Mold Steel Flange (300HB/30HRC) Synonyms -:- For detailed product information, please contact sales. -:

Industeel CLC 1.2311 Prehardened Mold Steel (300HB/30HRC) Product Information -:- For detailed product information, please contact sales. -: # **Technical Datasheet: Industeel CLC 1.2311 Prehardened Mold Steel (300HB/30HRC)** --- ## **1. Product Overview** **Industeel CLC 1.2311** is a premium-grade, **prehardened, chromium-nickel-molybdenum alloy mold steel** supplied in a ready-to-use condition with a hardness of approximately **300 HB (30 HRC)**. As a member of the "CLC" (Clean Low Carbon) family from Industeel (an ArcelorMittal company), this steel is characterized by its **excellent machinability, good polishability, and homogeneous microstructure** in the prehardened state. The "1.2311" designation follows the European Werkstoff number system, identifying it as a versatile plastic mold and die-casting steel. This material is specifically engineered to eliminate the need for heat treatment by mold makers, reducing lead times and avoiding the risks of distortion associated with quenching and tempering. Its balanced composition provides sufficient strength for most plastic injection molds and light-duty die-casting applications while maintaining outstanding processing characteristics. The prehardened condition (300HB) offers an optimal compromise between machinability and in-service performance. --- ## **2. Key International Standards & Designations** | Country/System | Standard Designation | Equivalent/Specification | | :--- | :--- | :--- | | **Europe (W-Nr.)** | **1.2311** | Standard grade designation | | **Europe (EN)** | **EN 1.2311** | Equivalent to former DIN 1.2311 | | **ISO** | **ISO 4957:2018** | **35CrMo2** (similar category) | | **USA (AISI/SAM)** | **P20 Modified** | Modified version of AISI P20 | | **Germany (DIN)** | **40CrMnNiMo8-6-4** | Chemical composition designation | | **Japan (JIS)** | **- -** | Similar to PDS5 or equivalent | | **China (GB)** | **3Cr2Mo** | Approximate equivalent | | **Common Names** | Prehardened P20, Plastic Mold Steel | - | **Note:** While often compared to AISI P20, CLC 1.2311 typically features slightly modified chemistry (often with nickel addition) for improved through-hardening characteristics and polishability in the prehardened state. --- ## **3. Chemical Composition (Typical %)** The composition is balanced for good hardenability, toughness, and polishability in the prehardened condition. | Element | Weight % (Typical) | Metallurgical Function | | :--- | :--- | :--- | | **Carbon (C)** | 0.35 - 0.45 | Provides base strength and hardness. Controlled level ensures good machinability at 300HB while maintaining adequate strength. | | **Chromium (Cr)** | 1.80 - 2.10 | Enhances hardenability, provides mild corrosion resistance, and improves polishability. | | **Manganese (Mn)** | 1.30 - 1.60 | Increases hardenability and strength. | | **Molybdenum (Mo)** | 0.15 - 0.25 | Improves hardenability, enhances toughness, and reduces temper embrittlement. | | **Nickel (Ni)** | **0.90 - 1.20** | **Key differentiator from standard P20.** Improves toughness and ensures more uniform hardness in thicker sections. Enhances polishability. | | **Silicon (Si)** | 0.20 - 0.40 | Deoxidizer and strengthens the matrix. | | **Sulfur (S)** | **0.005 - 0.015** | **Very low sulfur** – crucial for excellent polishability and reduced risk of pitting during polishing. | | **Phosphorus (P)** | ≤ 0.015 | Kept very low for improved toughness and polishability. | **Key Metallurgical Features in Prehardened State:** - **Homogeneous Tempered Martensite/Bainite Structure:** Provides uniform machining characteristics and consistent mechanical properties throughout the section. - **Excellent Cleanliness:** Low sulfur and phosphorus content minimize non-metallic inclusions, enhancing polishability and reducing defect risks. - **Through-Hardened Consistency:** The nickel addition helps maintain consistent hardness in thicker sections (up to ~400mm). --- ## **4. Physical & Mechanical Properties (Prehardened ~300HB/30HRC)** ### **4.1 Standard Supply Condition** * **Hardness:** **285 - 320 HB** (typically 300 HB, equivalent to ~30 HRC) * **Condition:** **Prehardened, tempered, and stress-relieved** – ready for machining * **Microstructure:** Fine tempered martensite/bainite * **Surface Condition:** Usually machined or ground to specified dimensions ### **4.2 Mechanical Properties (@ 300HB)** | Property | Value / Rating (Typical) | Test Standard / Notes | | :--- | :--- | :--- | | **Hardness** | **285 - 320 HB** (30-32 HRC) | Brinell or Rockwell C | | **Tensile Strength (Rm)** | **1000 - 1150 MPa** | ISO 6892-1 | | **Yield Strength (Rp0.2)** | **850 - 950 MPa** | ISO 6892-1 | | **Elongation (A₅)** | **12 - 16 %** | ISO 6892-1 | | **Reduction of Area (Z)** | **35 - 50 %** | ISO 6892-1 | | **Impact Toughness (KV)** | **40 - 60 J** (at 20°C) | ISO 148-1 (Charpy V-notch) | | **Fatigue Strength** | **~500-550 MPa** | Rotating bending test | | **Machinability** | **Excellent** | ~80-85% of free-cutting steel | ### **4.3 Physical Properties** * Density: 7.85 g/cm³ * Thermal Conductivity: ~38 W/m·K (at 20°C) * Specific Heat: 460 J/kg·K * Coefficient of Thermal Expansion: 11.5 × 10⁻⁶/K (20-100°C) * Modulus of Elasticity: 210 GPa * Thermal Treatment Dimensional Stability: Excellent (prehardened) --- ## **5. Typical Product Applications** CLC 1.2311 is primarily used in **plastic injection molding and light alloy die-casting applications** where prehardened steel offers economic and technical advantages. * **Plastic Injection Molds:** * **Mold bases, plates, and standard components** * **Cavities and cores** for technical and consumer plastic parts * **Ejector pins, sleeves, and guide components** * **Hot runner system components** (manifolds, nozzles) * **Die-Casting Applications:** * **Molds for aluminum and zinc die-casting** (light-duty applications) * **Inserts and core components** * **General Tooling:** * **Jigs and fixtures** * **Machine components** requiring good machinability and moderate strength * **Wear plates and guides** --- ## **6. Processing & Manufacturing Guidelines** ### **6.1 Machining (Prehardened State)** * **Turning:** Excellent results with coated carbide inserts. Recommended cutting speed: 150-250 m/min. * **Milling:** Use sharp, positive rake cutters. Climb milling recommended for better surface finish. * **Drilling:** Standard HSS or carbide drills perform well. Use cutting fluids for optimum results. * **EDM:** Excellent machinability. Standard EDM parameters apply. A stress relief (180-200°C) after rough EDM is recommended for precision components. ### **6.2 Grinding & Polishing** * **Grindability:** Excellent. Use aluminum oxide or CBN wheels. Produces good surface finishes with minimal risk of burning. * **Polishability:** **Very Good to Excellent.** Can achieve **SPI #1 (Mirror) finishes** (Ra < 0.01 µm) with proper technique. The low sulfur content prevents pitting during polishing. ### **6.3 Welding** * **Weldability:** Good (with precautions). Preheating to 250-300°C is recommended. * **Recommended Electrodes:** Similar composition welding wires (1.2311 type) or austenitic stainless for less critical repairs. * **Post-Weld Treatment:** Stress relieve at 250-300°C for 2 hours per 25mm thickness. ### **6.4 Nitriding & Surface Treatments** * **Nitriding Response:** Good. Can achieve surface hardness of 700-800 HV. * **Other Treatments:** Suitable for PVD coatings, chrome plating, and other surface enhancements. --- ## **7. Comparative Performance & Selection Notes** | Criterion | **CLC 1.2311 (300HB)** | **Standard AISI P20** | **1.2738 (HH)** | **Stavax ESR (420)** | | :--- | :--- | :--- | :--- | :--- | | **Hardness (As-Supplied)** | **300 HB** | 290-330 HB | 300-340 HB | 190-230 HB | | **Machinability** | **Excellent** | Very Good | Good | Excellent | | **Polishability** | **Very Good** | Good | Good | **Excellent** | | **Through-Hardening** | Good (to ~400mm) | Fair (to ~300mm) | Good (to ~400mm) | N/A | | **Cost Efficiency** | **High** | High | Moderate | High | | **Primary Application** | **General Plastic Molds** | General Plastic Molds | Larger Molds | **Corrosion-Resistant Molds** | **When to Choose CLC 1.2311:** 1. **Plastic injection molds** requiring good polishability and dimensional stability without post-machining heat treatment. 2. **Prototype or short-run molds** where fast delivery is critical. 3. **Mold bases and standard components** where consistent quality and easy machining are priorities. 4. Applications where **welding repairs** might be necessary during mold maintenance. **Limitations:** - **Not for high-wear applications** without surface treatment (nitriding recommended). - **Limited corrosion resistance** – not suitable for PVC or other corrosive plastics without protection. - **Not for hot work applications** above 250-300°C continuous service. --- ## **8. Quality & Certification** * **Standard Delivery:** Includes 3.1 Material Certificate per EN 10204 * **Ultrasonic Testing:** Available upon request (typically to SEP 1921 or customer specifications) * **Hardness Uniformity:** Typically within ±15 HB throughout the section * **Surface Quality:** Free from decarburization, scale, and major defects --- ## **9. Conclusion** **Industeel CLC 1.2311 in prehardened condition (300HB/30HRC) represents an optimal solution for a wide range of plastic injection mold applications where time-to-market, machining efficiency, and consistent quality are paramount.** Its balanced composition – particularly the nickel addition – ensures uniform properties in substantial sections while maintaining excellent machinability and very good polishability. **Key advantages include:** - **Elimination of heat treatment** costs, risks, and lead times - **Superior machinability** for reduced manufacturing costs - **Excellent polishability** for high-quality mold surfaces - **Good weldability** for repairs and modifications - **Consistent, reliable performance** from a major steel producer For mold makers and manufacturers seeking a **proven, cost-effective, and readily available prehardened mold steel** for general-purpose plastic injection molds and light die-casting applications, **CLC 1.2311 at 300HB offers an outstanding combination of processability, performance, and value.** Its widespread use across the European and global mold-making industry stands as testament to its reliability and effectiveness. --- -:- For detailed product information, please contact sales. -: Industeel CLC 1.2311 Prehardened Mold Steel (300HB/30HRC) Specification Dimensions Size： Diameter 20-1000 mm Length <5242 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. -: Industeel CLC 1.2311 Prehardened Mold Steel (300HB/30HRC) Properties -:- For detailed product information, please contact sales. -:

Applications of InduSteel Flange CLC 1.2311 Prehardened Mold Steel Flange (300HB/30HRC) -:- For detailed product information, please contact sales. -: Chemical Identifiers InduSteel Flange CLC 1.2311 Prehardened Mold Steel Flange (300HB/30HRC) -:- For detailed product information, please contact sales. -:

Packing of InduSteel Flange CLC 1.2311 Prehardened Mold Steel Flange (300HB/30HRC) -:- 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 1713 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