Latrobe,LSS™ 420 Supreme Plastic Mold Steel Flange (AISI 420)

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. -: Latrobe LSS™ 420 Supreme Plastic Mold Steel Flange (AISI 420) Product Information -:- For detailed product information, please contact sales. -: Latrobe LSS™ 420 Supreme Plastic Mold Steel Flange (AISI 420) Synonyms -:- For detailed product information, please contact sales. -:

Latrobe LSS™ 420 Supreme Plastic Mold Steel (AISI 420) Product Information -:- For detailed product information, please contact sales. -: # **Product Datasheet: Latrobe LSS™ 420 Supreme Plastic Mold Steel** ## **Overview** Latrobe LSS™ 420 Supreme represents the pinnacle of premium martensitic stainless mold steel technology. Engineered specifically for the most demanding plastic injection molding applications, this AISI 420-based alloy combines exceptional corrosion resistance with superior polishability and enhanced mechanical properties. The "Supreme" designation indicates an advanced manufacturing process that delivers ultra-clean steel with exceptional microstructural homogeneity, making it ideal for critical applications where flawless surface finish, dimensional stability, and extended tool life are paramount. ## **Key Features & Advantages** - **Ultra-High Polishability** - Capable of achieving A1 diamond finish (Ra < 0.010 μm) for optical-quality surfaces - **Enhanced Corrosion Resistance** - Superior resistance to PVC acid attack, moisture, and corrosive plastic additives - **Exceptional Microstructural Homogeneity** - Advanced melting technology ensures uniform carbide distribution - **Improved Machinability** - Optimized for reduced tool wear and enhanced EDM performance - **Excellent Dimensional Stability** - Minimal distortion during heat treatment and machining - **Superior Wear Resistance** - Enhanced surface durability for high-volume production molds ## **International Standards & Cross-References** | **Standard System** | **Designation** | **Comparable Grades** | |---------------------|-----------------|------------------------| | **AISI/SAE** | 420 Modified | Proprietary Supreme grade | | **UNS** | S42000 | - | | **DIN/EN** | 1.2083 ESR | Enhanced version | | **ISO** | 35CrMo13 | Premium variant | | **JIS** | SUS420J2 | Superior quality | | **Common Equivalents** | - | Böhler M238 / Uddeholm Stavax Supreme / Thyssen 1.2083S | ## **Chemical Composition** | **Element** | **Content (%)** | **Function** | |-------------|-----------------|--------------| | **Carbon (C)** | 0.38-0.42 | Hardness & wear resistance | | **Chromium (Cr)** | 13.0-14.0 | Corrosion resistance | | **Silicon (Si)** | ≤ 0.80 | Deoxidizer, strength | | **Manganese (Mn)** | ≤ 0.70 | Hardening response | | **Molybdenum (Mo)** | 0.15-0.35 | Hardenability & strength | | **Vanadium (V)** | 0.10-0.20 | Grain refinement | | **Sulfur (S)** | ≤ 0.005 | Ultra-low for polishability | | **Phosphorus (P)** | ≤ 0.015 | Ultra-low for toughness | *Note: Proprietary modifications enhance polishability and corrosion resistance beyond standard AISI 420.* ## **Physical Properties** | **Property** | **Value** | **Conditions** | |--------------|-----------|----------------| | **Density** | 7.78 g/cm³ | 20°C | | **Thermal Conductivity** | 28.0 W/m·K | 20°C | | **Specific Heat Capacity** | 460 J/kg·K | 20°C | | **Coefficient of Thermal Expansion** | 10.5 × 10⁻⁶/K | 20-100°C | | **Modulus of Elasticity** | 215 GPa | 20°C | | **Magnetic Properties** | Ferromagnetic | All conditions | ## **Mechanical Properties** ### **Pre-Hardened Condition (As Supplied)** | **Property** | **Value** | **Test Method** | |--------------|-----------|-----------------| | **Hardness** | 30-34 HRC | ASTM E18 | | **Tensile Strength** | 1000-1100 MPa | ASTM E8 | | **Yield Strength (0.2%)** | 850-950 MPa | ASTM E8 | | **Elongation** | 12-15% | ASTM E8 | | **Reduction of Area** | 35-40% | ASTM E8 | | **Impact Toughness** | 25-30 J | ASTM E23 | ### **Hardened & Tempered Condition** | **Tempering Temperature** | **Hardness (HRC)** | **Application** | |---------------------------|-------------------|-----------------| | **180-200°C** | 52-54 | Maximum hardness | | **250-300°C** | 50-52 | Optimal balance | | **350-400°C** | 48-50 | High toughness | | **400-450°C** | 46-48 | Maximum toughness | ## **Heat Treatment Specifications** ### **Annealing** - **Process:** Heat to 840-860°C (1545-1580°F), hold 2-4 hours - **Cooling:** Slow furnace cool at 15-20°C/hour to 600°C (1110°F), then air cool - **Resulting Hardness:** ≤ 235 HB ### **Hardening** - **Preheat:** 750-800°C (1380-1470°F) - essential for dimensional stability - **Austenitizing:** 980-1050°C (1795-1920°F), hold 20-30 minutes per inch of thickness - **Quenching:** Oil or forced air (for sections < 100mm) - **Immediate Tempering:** Required within 1 hour of quenching ### **Tempering** - **Temperature Range:** 180-450°C (355-840°F) - **Cycles:** Double tempering recommended - **Hold Time:** Minimum 2 hours per inch of thickness ## **Processing Characteristics** ### **Machinability** - **Relative Machinability:** 65% (compared to 1% for AISI 1212 steel) - **Cutting Speed:** 40-60 m/min with carbide tools - **Feed Rate:** 0.15-0.25 mm/rev - **Coolant:** Required for optimum results ### **EDM Performance** - **Material Removal Rate:** 300-400 mm³/min (roughing) - **Surface Finish:** Ra 1.6-3.2 μm achievable - **White Layer:** Minimal with proper settings - **Recommended:** Fine-finish EDM for critical surfaces ### **Polishing Procedure** 1. **Initial Grinding:** 180-240 grit diamond wheel 2. **Intermediate Steps:** 320, 400, 600 grit diamond paste 3. **Final Polish:** 1200 grit diamond compound for optical finish 4. **Mirror Finish:** 1-3 μm diamond suspension for A1 finish ## **Typical Applications** ### **Primary Applications** 1. **Optical Components** - Camera lenses and housings - LED light guides and diffusers - Optical sensor covers - Medical device lenses 2. **Consumer Electronics** - Smartphone and tablet exteriors - High-gloss appliance panels - Transparent display covers - Wearable device components 3. **Automotive Components** - Light covers and lenses - Instrument panel covers - Decorative trim elements - Reflector housings 4. **Medical & Pharmaceutical** - Transparent medical device housings - Diagnostic equipment components - Pharmaceutical packaging molds - Laboratory equipment parts 5. **Corrosive Material Molds** - PVC pipe fittings and connectors - Flame-retardant (FR) plastic components - Acid-releasing plastic materials - Chemical container molds ### **Component Applications** - Injection mold cavities and cores - Hot runner system components - Ejector pins and sleeves - Slideways and lifters - High-wear inserts ## **Quality Certifications** - ISO 9001:2015 Quality Management System - ASTM A681 Standard Specification for Tool Steel - Clean Steel Standards: ASTM E45 Method D ≤ 0.5 - Traceability: Full heat-to-component traceability ## **Technical Support & Services** - Application engineering support - Heat treatment consultation - Machining parameter optimization - Failure analysis and troubleshooting ## **Disclaimer** Properties listed are typical values. Actual performance may vary based on specific processing conditions, heat treatment, and application requirements. Users should conduct appropriate testing for their specific applications. --- **Latrobe Specialty Metals** *Precision Engineered Steel Solutions* www.latrobe.com -:- For detailed product information, please contact sales. -: Latrobe LSS™ 420 Supreme Plastic Mold Steel (AISI 420) Specification Dimensions Size： Diameter 20-1000 mm Length <7215 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. -: Latrobe LSS™ 420 Supreme Plastic Mold Steel (AISI 420) Properties -:- For detailed product information, please contact sales. -:

Applications of Latrobe LSS™ 420 Supreme Plastic Mold Steel Flange (AISI 420) -:- For detailed product information, please contact sales. -: Chemical Identifiers Latrobe LSS™ 420 Supreme Plastic Mold Steel Flange (AISI 420) -:- For detailed product information, please contact sales. -:

Packing of Latrobe LSS™ 420 Supreme Plastic Mold Steel Flange (AISI 420) -:- 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 3686 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