Crucible Steel Flange,KAPSTAR® Mold 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. -: Crucible Steel Flange KAPSTAR® Mold Steel Flange Product Information -:- For detailed product information, please contact sales. -: Crucible Steel Flange KAPSTAR® Mold Steel Flange Synonyms -:- For detailed product information, please contact sales. -:

Crucible Steel KAPSTAR® Mold Steel Product Information -:- For detailed product information, please contact sales. -: # **Product Introduction: Crucible Steel KAPSTAR® Mold Steel** Crucible Steel KAPSTAR® is a premium, vacuum-degassed, corrosion-resistant martensitic stainless mold steel, specifically engineered to bridge the gap between standard mold steels (like P20) and high-alloy stainless steels. It is designed for applications requiring **exceptional corrosion resistance, excellent polishability, and good wear resistance** in demanding molding environments, particularly those involving **corrosive plastics, additives, or high-humidity conditions**. The name "KAPSTAR" reflects its capability as a star-performing material in corrosive ("KAP" from the German "Korrosion") environments. KAPSTAR® offers a significant performance upgrade over pre-hardened P20-type steels when corrosion is a primary concern, such as in molding PVC, flame-retardant materials, or materials that release acidic byproducts. It is typically supplied in a pre-hardened and tempered condition, providing immediate machinability without the need for subsequent heat treatment. Its balanced composition provides a reliable combination of hardness, toughness, and the stainless property, making it a versatile and durable choice for high-quality, long-life production molds. --- ## **1. Chemical Composition (Weight %)** The composition is a martensitic stainless steel with balanced chromium, nickel, and molybdenum for corrosion resistance and hardenability. | **Element** | **Chromium (Cr)** | **Nickel (Ni)** | **Molybdenum (Mo)** | **Carbon (C)** | **Manganese (Mn)** | **Silicon (Si)** | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | | **Content** | **13.50 - 15.00** | **0.80 - 1.20** | **0.80 - 1.20** | **0.20 - 0.30** | **≤ 1.00** | **≤ 0.80** | | **Role** | **Primary corrosion resistance element.** Forms a passive chromium oxide (Cr₂O₃) layer on the surface, providing excellent resistance to rust, tarnishing, and attack from many chemicals and plastics. | Austenite stabilizer; enhances toughness, ductility, and hardenability. Improves through-hardening characteristics. | Enhances hardenability, increases strength (especially yield strength), and significantly improves resistance to pitting and crevice corrosion. | Provides base strength and hardness. Kept at a moderate level to ensure good toughness and weldability while allowing for sufficient hardness. | Aids in deoxidation and contributes to hardenability. | Deoxidizer and solid solution strengthener. | *Note: Iron (Fe) constitutes the remainder. Sulfur and phosphorus are kept at very low levels to maximize purity and polishability.* --- ## **2. Physical & Mechanical Properties** *Typically supplied in a pre-hardened and tempered condition to a uniform hardness of 30-34 HRC.* * **Density:** ~7.75 g/cm³ (0.280 lb/in³) * **Modulus of Elasticity:** ~200 GPa (29.0 x 10⁶ psi) * **Thermal Conductivity:** Moderate. * **Supplied Hardness:** **30 - 34 HRC.** This pre-hardened state offers a good balance of machinability and wear resistance for immediate use. * **Corrosion Resistance:** **Excellent (for a mold steel).** Superior to P20 and many other alloy mold steels. Highly resistant to rust from cooling water, humid atmospheres, and corrosive plastic decomposition products (e.g., HCl from PVC). * **Polishability:** **Excellent.** Capable of achieving very high-grade, mirror-like surface finishes (e.g., SPI-A1), which is critical for optical parts, lenses, and high-gloss surfaces. The clean, homogeneous structure is key. * **Machinability:** **Good.** In its pre-hardened state, it machines well with appropriate tooling and parameters, though slightly more challenging than P20 due to its higher strength and work-hardening tendency. * **Toughness:** **Good.** Adequate impact resistance for most mold applications, including complex cores and slides. * **Wear Resistance:** **Good.** Better than P20 at equivalent hardness due to its finer microstructure and alloy content. Suitable for molding abrasive filled plastics, though for extreme cases, surface hardening may be applied. * **Dimensional Stability:** **Very Good.** Exhibits minimal distortion during machining and in service. --- ## **3. Processing & Heat Treatment** KAPSTAR® is designed for user-friendly processing in its supplied condition. * **As-Supplied Condition:** **Pre-hardened, tempered, and stress-relieved to 30-34 HRC. Ready for machining.** * **Machining:** Can be machined directly using techniques for 32 HRC material. Use sharp, positive-rake carbide tools. * **Finishing:** Excellent response to polishing, texturing (EDM, laser), and photo-etching. * **Welding:** Weldable with proper precautions (pre-heat, post-heat, matching electrodes). Commonly welded for mold repairs. * **Surface Hardening:** Can be nitrided (gas or plasma) to significantly increase surface hardness (up to 70+ HRC) for extreme wear resistance without affecting corrosion resistance. --- ## **4. Key Applications** KAPSTAR® is the ideal choice for molds operating in corrosive or high-hygiene environments. * **Molds for Corrosive Plastics:** PVC (polyvinyl chloride), flame-retardant (FR) plastics, polyurethane (PU) foam, and other halogenated or acidic material molds. * **Optical and High-Gloss Molds:** For lenses, light guides, reflectors, and consumer electronics parts requiring superior polishability and stain-free surfaces. * **Medical Device and Food Packaging Molds:** Where hygiene, corrosion resistance, and cleanability are paramount. * **Molds for Regrind/Recycled Materials:** Often contain contaminants that cause corrosion in standard steels. * **Large Molds Exposed to Humid Environments:** To prevent rusting during storage or operation. --- ## **5. International Standards & Cross-References** KAPSTAR® is a proprietary grade but aligns with the family of pre-hardened, corrosion-resistant martensitic stainless mold steels. * **AISI/SAE:** Similar to a modified **420** or **422** type stainless steel with optimized pre-hardened properties. Not a direct AISI standard. * **European (EN):** **1.2083** (X42Cr13) is a similar corrosion-resistant martensitic mold steel, though KAPSTAR's composition may include Ni and Mo for enhanced properties. * **Japanese (JIS):** **SUS420J2** (modified, pre-hardened) or **S-STAR** (Daido's proprietary equivalent) are close analogues. * **Common Industry Equivalents:** **Uddeholm STAVAX ESR, Böhler M300, Thyssenkrupp GS-083, Daido NAK 80 (similar in application but different composition).** * **Material Type:** Pre-hardened martensitic stainless mold steel. --- ## **6. Advantages & Limitations** **Advantages:** * **Superior Corrosion Resistance:** Eliminates rust problems, reduces maintenance, and ensures part quality. * **Outstanding Polishability:** Achieves the highest surface finishes required for aesthetic and optical parts. * **Good All-Round Mechanical Properties:** Balanced hardness, toughness, and wear resistance in a ready-to-use condition. * **Reduced Downtime:** Pre-hardened state eliminates heat treatment risks and reduces mold manufacturing lead time. * **Long Mold Life:** Resists degradation from both wear and corrosion, extending production run times. **Limitations:** * **Higher Cost:** More expensive than standard P20 or alloy mold steels. * **Machinability:** Slightly more difficult to machine than P20, requiring appropriate tooling and parameters. * **Not for Extreme High-Temperature Molding:** While good, its maximum continuous service temperature is lower than hot work steels. * **Thermal Conductivity:** Lower than some alloy steels, which can be a consideration for high-cycle molding. --- ## **7. Summary** **Crucible Steel KAPSTAR® is the definitive problem-solving mold steel for applications where corrosion is the enemy of quality, productivity, and tool life.** It transforms the challenge of molding aggressive materials from a maintenance headache into a reliable, high-performance process. By delivering stainless properties, exceptional polishability, and ready-to-machine convenience in one material, KAPSTAR® enables mold makers to produce durable, high-precision tools for the most demanding applications in the medical, optical, consumer electronics, and specialty plastics industries. It is not just an alternative to P20; it is a strategic upgrade that safeguards investment, ensures part quality, and maximizes uptime in corrosive molding environments. -:- For detailed product information, please contact sales. -: Crucible Steel KAPSTAR® Mold Steel Specification Dimensions Size： Diameter 20-1000 mm Length <7001 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. -: Crucible Steel KAPSTAR® Mold Steel Properties -:- For detailed product information, please contact sales. -:

Applications of Crucible Steel Flange KAPSTAR® Mold Steel Flange -:- For detailed product information, please contact sales. -: Chemical Identifiers Crucible Steel Flange KAPSTAR® Mold Steel Flange -:- For detailed product information, please contact sales. -:

Packing of Crucible Steel Flange KAPSTAR® Mold 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 3472 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