Latrobe,Viscount 20® Free Machining Tool Steel Flange (ASTM H13S)

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 Viscount 20® Free Machining Tool Steel Flange (ASTM H13S) Product Information -:- For detailed product information, please contact sales. -: Latrobe Viscount 20® Free Machining Tool Steel Flange (ASTM H13S) Synonyms -:- For detailed product information, please contact sales. -:

Latrobe Viscount 20® Free Machining Tool Steel (ASTM H13S) Product Information -:- For detailed product information, please contact sales. -: # **Latrobe Viscount 20® Free-Machining Hot Work Tool Steel (ASTM H13S)** ## **Premium Sulfurized H13 Variant for Enhanced Machinability** Latrobe Viscount 20® represents a specialized free-machining variant of the industry-standard H13 hot work tool steel, engineered to provide dramatically improved machinability while maintaining the essential thermal and mechanical properties of conventional H13. Through controlled sulfur addition and specialized processing, this grade offers significant productivity advantages in machining operations while remaining suitable for many hot work applications where extreme thermal fatigue resistance is not the primary requirement. The "Viscount 20" designation reflects its premium status and distinctive cutting performance characteristics. --- ### **Key Features & Benefits** - **Exceptional Machinability**: Dramatically improved cutting performance - typically 30-50% better than standard H13 - **Good Hot Work Properties**: Maintains core H13 characteristics including air-hardening capability and moderate hot hardness - **Enhanced Chip Breaking**: Sulfide inclusions promote chip fragmentation, improving surface finish and tool life - **Reduced Cutting Forces**: Lower power consumption and reduced machine tool wear during machining operations - **Maintained Dimensional Stability**: Good heat treatment response with controlled distortion characteristics - **Cost-Effective Fabrication**: Significant reduction in machining time and tooling costs --- ### **Chemical Composition (Typical %, ASTM A681 H13 Modified with Sulfur)** | Element | Carbon (C) | Chromium (Cr) | Molybdenum (Mo) | Vanadium (V) | Silicon (Si) | Manganese (Mn) | Sulfur (S) | |---------|------------|---------------|-----------------|--------------|--------------|----------------|------------| | **Content** | 0.35 - 0.45 | 4.75 - 5.50 | 1.10 - 1.75 | 0.80 - 1.20 | 0.80 - 1.20 | 0.20 - 0.60 | 0.08 - 0.15 | *Note: Viscount 20® maintains the fundamental H13 alloy composition while incorporating controlled sulfur addition (typically 0.10-0.13%) to form manganese sulfide inclusions that dramatically improve machinability. The balance of other elements is optimized to mitigate potential adverse effects of sulfur on hot work properties.* --- ### **Physical & Mechanical Properties** | Property | Value / Description | |----------|---------------------| | **Density** | 7.79 g/cm³ (slightly reduced due to sulfide content) | | **Thermal Conductivity** | 24-28 W/m·K at 20°C | | **Specific Heat Capacity** | 0.46 kJ/kg·K at 20°C | | **Coefficient of Thermal Expansion** | 11.0 × 10⁻⁶/K (20-400°C) | | **Hardness (Annealed)** | 187-229 HB | | **Hardness (Heat Treated)** | **42-50 HRC** (typical working range) | | **Tensile Strength** | 1,550-1,950 MPa (at 46 HRC) | | **Yield Strength** | 1,350-1,750 MPa (at 46 HRC) | | **Modulus of Elasticity** | 200-210 GPa | | **Impact Toughness** | Moderate - reduced compared to standard H13 due to sulfide content | | **Machinability Rating** | **75-90%** of B1112 free-machining steel | --- ### **Heat Treatment Guidelines** #### **Annealing** - **Temperature**: 845-900°C (1555-1650°F) - **Method**: Slow furnace cool at ≤22°C (40°F) per hour to 600°C (1110°F), then air cool - **Resultant Hardness**: 187-229 HB - **Special Note**: Similar to standard H13 but with slightly improved stability #### **Stress Relieving** - **Temperature**: 650-675°C (1200-1245°F) - **Hold Time**: 1-2 hours per inch of thickness - **Cooling**: Air cool to room temperature #### **Hardening** 1. **Preheating**: 650-750°C (1200-1380°F) - thorough equalization 2. **Austenitizing**: **1000-1030°C (1830-1885°F)** - similar to standard H13 3. **Soak Time**: 20-40 minutes per inch of thickness 4. **Quenching**: Air cooling standard; oil for maximum hardness 5. **Immediate Handling**: Cool to below 65°C (150°F) before tempering #### **Tempering** - **Temperature Range**: 540-620°C (1005-1150°F) - **Cycles**: Double tempering recommended for dimensional stability - **Duration**: 2 hours per cycle minimum - **Target Hardness**: 42-50 HRC typically achieved at 560-600°C (1040-1110°F) - **Special Consideration**: Slightly reduced secondary hardening compared to standard H13 --- ### **International Standards & Equivalent Grades** | Standard | Grade Designation | Notes | |----------|-------------------|-------| | **ASTM** | Modified H13 (H13S type) | Sulfurized variant of A681 H13 | | **Proprietary** | Viscount 20® | Latrobe Special Steel trademark | | **Similar Grades** | H13 FM, H13 Easy-Machining | Various free-machining H13 variants | | **ISO** | Not standardized | Considered a proprietary modification | | **DIN** | 1.2344 + S | German equivalent with sulfur addition | | **AISI** | H13 Modified | American Iron and Steel Institute reference | --- ### **Typical Applications** #### **Prototype and Short-Run Tooling** - **Prototype Die Casting Dies**: For product development and testing - **Low-Volume Production Tools**: Where machining cost dominates total tooling cost - **Experimental Tooling**: For process development and evaluation #### **Complex Geometry Components** - **Intricate Die Components**: With complex internal passages and detailed features - **Precision Tooling Elements**: Requiring extensive machining operations - **Multi-Cavity Mold Inserts**: With significant material removal requirements #### **Educational and Training Applications** - **Toolmaking Training**: For technical schools and apprenticeship programs - **Demonstration Tools**: For machining and tooling demonstrations - **Educational Projects**: Where machinability is prioritized over ultimate performance #### **Maintenance and Repair Components** - **Replacement Parts**: For maintenance of existing tooling - **Repair Inserts**: Where extensive machining is required for fitting - **Adaptor Plates and Fixtures**: For tooling modification and adaptation #### **Non-Critical Hot Work Applications** - **Lower-Stress Die Casting Components**: Ejector pins, guide pins, support pillars - **Hot Work Fixtures**: Clamps, supports, and handling tools - **Auxiliary Tooling Components**: Not subject to severe thermal cycling --- ### **Machining & Fabrication Notes** #### **Machinability (Annealed Condition)** - **Rating**: **75-90%** of B1112 free-machining steel (exceptional for hot work steel) - **Cutting Speeds**: 40-60 m/min (130-200 SFM) for turning operations with carbide tools - **Material Removal Rates**: 30-50% higher than standard H13 - **Tool Life**: 2-3 times longer than with standard H13 - **Surface Finish**: Superior achievable finish due to improved chip control - **Power Consumption**: 20-30% reduction compared to standard H13 #### **Grindability** - **Relative Rating**: 80-90 (vs. 100 for annealed O1 tool steel) - **Special Consideration**: Sulfide inclusions may affect grinding wheel performance - **Coolant Requirements**: Standard grinding coolant adequate - **Surface Finish**: Good grindability with proper wheel selection #### **EDM Machining** - Good EDM characteristics - Slightly faster material removal rates than standard H13 - Good surface finish achievable - Standard EDM parameters applicable --- ### **Quality Assurance & Metallurgical Standards** #### **Microstructural Characteristics** - **Sulfide Distribution**: Controlled manganese sulfide inclusions evenly distributed - **Inclusion Morphology**: Type II manganese sulfides (elongated during working) - **Carbide Distribution**: Similar to standard H13 with slightly modified morphology - **Grain Size**: ASTM 6 or finer - **Decarburization**: ≤0.25 mm per side on rough stock #### **Testing & Certification** - Complete chemical analysis with sulfur verification - Hardness testing throughout production - Machinability testing available - Standard material test reports with special note of sulfur content --- ### **Available Product Forms** | Form | Standard Sizes | Condition | Surface Finish | |------|---------------|-----------|---------------| | **Round Bars** | 10mm - 300mm diameter | Annealed | Black, Peeled, Ground | | **Flat Bars and Plate** | 10-150mm thickness | Annealed | Mill, Ground | | **Blocks** | Various dimensions | Annealed | Rough or finish machined | | **Squares** | 10-150mm | Annealed | As-rolled, Ground | --- ### **Technical Comparison: Viscount 20® vs. Standard H13** | Property | Viscount 20® | Standard H13 | Notes | |----------|--------------|--------------|-------| | **Machinability** | **Excellent** | Good | Primary advantage | | **Impact Toughness** | Moderate | Very Good | Reduced due to sulfides | | **Thermal Fatigue** | Good | Excellent | Not for severe cycling | | **Hot Hardness** | Good | Very Good | Adequate for many apps | | **Wear Resistance** | Good | Very Good | Slightly reduced | | **Chip Control** | **Excellent** | Fair | Dramatic improvement | | **Cost per Part** | **Lower** | Higher | Due to machining savings | --- ### **Design and Application Considerations** 1. **Not Recommended For**: - Severe thermal cycling applications - Critical die casting cavities subject to extreme thermal fatigue - Applications requiring maximum impact toughness - High-pressure die casting of complex thin-wall components 2. **Ideal Applications**: - Prototype tooling with extensive machining - Tooling components with complex internal features - Low to moderate production volume applications - Educational and training applications --- ### **Economic Considerations** 1. **Material Cost**: Similar to standard H13 2. **Machining Cost**: **30-50% reduction** in typical applications 3. **Tooling Cost**: Reduced cutting tool consumption 4. **Productivity**: Increased throughput in machining operations 5. **Overall Value**: Excellent where machining dominates total cost --- ### **Technical Support** Latrobe provides specialized technical support for Viscount 20®: - **Machining Optimization**: Guidance on optimal cutting parameters - **Application Engineering**: Assistance with appropriate applications - **Troubleshooting**: Support for machining and performance issues - **Technical Data**: Comprehensive machining recommendations --- **Select Latrobe Viscount 20® Free-Machining Hot Work Tool Steel** when machining productivity is the primary concern and the thermal fatigue requirements are moderate. This specialized grade delivers exceptional machinability while maintaining sufficient hot work properties for many applications. Viscount 20® represents an optimal solution for prototype tooling, complex components requiring extensive machining, educational applications, and situations where machining costs significantly impact total project economics. When "time to first part" or machining efficiency drives project success, Viscount 20® provides a proven solution that balances machinability with functional performance. -:- For detailed product information, please contact sales. -: Latrobe Viscount 20® Free Machining Tool Steel (ASTM H13S) Specification Dimensions Size： Diameter 20-1000 mm Length <7170 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 Viscount 20® Free Machining Tool Steel (ASTM H13S) Properties -:- For detailed product information, please contact sales. -:

Applications of Latrobe Viscount 20® Free Machining Tool Steel Flange (ASTM H13S) -:- For detailed product information, please contact sales. -: Chemical Identifiers Latrobe Viscount 20® Free Machining Tool Steel Flange (ASTM H13S) -:- For detailed product information, please contact sales. -:

Packing of Latrobe Viscount 20® Free Machining Tool Steel Flange (ASTM H13S) -:- 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 3641 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