Latrobe,LSS™ H19 Hot Work Tool Steel Tube,Pipe (ASTM H19)

Latrobe LSS™ H19 Hot Work Tool Steel Tube (ASTM H19) Product Information -:- For detailed product information, please contact sales. -: Latrobe LSS™ H19 Hot Work Tool Steel Tube (ASTM H19) Synonyms -:- For detailed product information, please contact sales. -:

Latrobe LSS™ H19 Hot Work Tool Steel (ASTM H19) Product Information -:- For detailed product information, please contact sales. -: # **Latrobe LSS™ H19 Hot Work Tool Steel** ## **Ultra-High Tungsten-Cobalt Hot Work Steel for Extreme Temperature Applications** Latrobe LSS™ H19 represents the pinnacle of tungsten-based hot work tool steel technology, combining high tungsten content with substantial cobalt addition to deliver exceptional hot hardness and wear resistance at extreme temperatures. As an ASTM H19 grade, it offers superior resistance to softening and deformation under severe thermal conditions, making it particularly suitable for the most demanding hot work applications involving high-temperature alloys and challenging materials. This specialized grade is engineered for applications where conventional hot work steels cannot maintain sufficient hardness and dimensional stability. --- ### **Key Features & Benefits** - **Exceptional Hot Hardness**: Superior resistance to softening at temperatures up to 700°C (1290°F) - **Outstanding Wear Resistance**: High tungsten content provides excellent abrasion resistance in extreme conditions - **Excellent High-Temperature Strength**: Maintains mechanical properties under severe thermal loading - **Good Red Hardness**: Cobalt addition enhances hardness retention at elevated temperatures - **Specialized Application Focus**: Optimized for the most demanding high-temperature processes - **Dimensional Stability**: Reasonable stability considering the extreme service conditions --- ### **Chemical Composition (Typical %, ASTM A681 H19)** | Element | Carbon (C) | Tungsten (W) | Chromium (Cr) | Vanadium (V) | Cobalt (Co) | Silicon (Si) | Manganese (Mn) | |---------|------------|--------------|---------------|--------------|-------------|--------------|----------------| | **Content** | 0.32 - 0.45 | 3.75 - 4.50 | 4.00 - 4.75 | 1.75 - 2.20 | 4.00 - 4.50 | 0.80 - 1.20 | 0.20 - 0.60 | *Note: LSS™ H19 features a distinctive high-tungsten, high-cobalt, high-vanadium composition that provides exceptional hot hardness and wear resistance. The combination of tungsten for hot hardness, vanadium for wear resistance, and cobalt for enhanced red hardness creates a material uniquely suited for the most extreme hot work applications.* --- ### **Physical & Mechanical Properties** | Property | Value / Description | |----------|---------------------| | **Density** | 8.10 g/cm³ | | **Thermal Conductivity** | 22-26 W/m·K at 20°C | | **Specific Heat Capacity** | 0.44 kJ/kg·K at 20°C | | **Coefficient of Thermal Expansion** | 10.5 × 10⁻⁶/K (20-400°C) | | **Hardness (Annealed)** | 207-235 HB | | **Hardness (Heat Treated)** | **48-55 HRC** (typical working range) | | **Hot Hardness Retention** | Maintains excellent hardness up to 700°C (1290°F) | | **Tensile Strength** | 1,700-2,100 MPa (at 52 HRC) | | **Yield Strength** | 1,500-1,900 MPa (at 52 HRC) | | **Modulus of Elasticity** | 215-225 GPa | | **Impact Toughness** | Moderate – optimized for extreme temperature applications | --- ### **Heat Treatment Guidelines** #### **Annealing** - **Temperature**: 870-900°C (1600-1650°F) - **Method**: Slow furnace cool at ≤20°C (36°F) per hour to 600°C (1110°F), then air cool - **Resultant Hardness**: 207-235 HB #### **Stress Relieving** - **Temperature**: 680-710°C (1255-1310°F) - **Hold Time**: 1.5-2.5 hours per inch of thickness - **Cooling**: Slow furnace cool to 500°C (930°F), then air cool #### **Hardening (Requires Careful Control)** 1. **Preheating**: 650-750°C (1200-1380°F) – thorough equalization essential 2. **Intermediate Preheat**: 850-900°C (1560-1650°F) – recommended for all applications 3. **Austenitizing**: **1080-1130°C (1975-2065°F)** – high temperature required for tungsten solution 4. **Soak Time**: 20-40 minutes per inch of thickness 5. **Quenching**: Oil quenching required; air cooling generally insufficient 6. **Immediate Handling**: Cool to 50-65°C (120-150°F) before tempering #### **Tempering** - **Temperature Range**: 560-650°C (1040-1200°F) - **Cycles**: Double or triple tempering recommended for optimal performance - **Duration**: 2 hours per cycle minimum, air cool between cycles - **Target Hardness**: 48-55 HRC typically achieved at 580-620°C (1075-1150°F) - **Special Note**: Higher tempering temperatures often used to optimize toughness for specific applications --- ### **International Standards & Equivalent Grades** | Standard | Grade Designation | Notes | |----------|-------------------|-------| | **ASTM** | A681 H19 | Primary specification (UNS T20819) | | **ISO** | 45WCrV7Co | ISO 4957 designation | | **DIN** | 1.2606 / X30WCrV9-3 (Modified) | German standard (similar characteristics) | | **JIS** | Not directly equivalent | Japanese standards lack direct equivalent | | **AFNOR** | 45WCrV7Co | French association standard | | **GB** | 4Cr4W4Mo2VCo | Chinese equivalent (approximate) | | **UNS** | T20819 | Unified Numbering System | --- ### **Typical Applications** #### **Extreme Temperature Forging** - **Superalloy Forging Dies**: For nickel-based alloys (Inconel, Waspaloy, etc.) - **Titanium Forging Tools**: Where extreme temperatures are encountered - **Refractory Metal Forming**: For tungsten, molybdenum, and related alloys - **High-Speed Steel Forging**: For tool steel production #### **Specialized Extrusion Applications** - **Steel Extrusion Dies**: Particularly for high-alloy steels - **High-Temperature Alloy Extrusion**: For aerospace and energy applications - **Copper and Brass Extrusion**: For demanding conditions - **Tungsten Carbide Extrusion**: For powder metallurgy applications #### **Hot Piercing and Forming** - **Hot Piercing Punches**: For high-temperature alloy tubes - **Hot Forming Mandrels**: Subject to extreme thermal and mechanical stresses - **Hot Shearing Tools**: For cutting high-temperature materials - **Specialty Hot Work Tools**: For unique high-temperature processes #### **Aerospace and Power Generation** - **Turbine Component Tooling**: For manufacturing high-temperature engine parts - **Nuclear Component Tooling**: For specialized high-temperature applications - **Rocket Component Manufacturing**: For aerospace propulsion systems #### **Research and Special Applications** - **Laboratory Tooling**: For materials research at extreme temperatures - **Specialty Manufacturing**: For unique industrial processes - **Advanced Materials Processing**: For next-generation materials development --- ### **Machining & Fabrication Notes** #### **Machinability (Annealed Condition)** - **Rating**: 40-50% of B1112 free-machining steel – **difficult to machine** - **Recommended Tools**: **Carbide tools essential** – premium grades recommended - **Cutting Speeds**: 10-20 m/min (30-65 SFM) for turning operations - **Feed Rates**: Light to moderate feeds with sharp tooling - **Coolant**: Heavy-duty synthetic coolant essential - **Special Requirement**: Rigid setup and conservative parameters recommended #### **Grindability** - **Relative Rating**: 50-60 (vs. 100 for annealed O1 tool steel) – **difficult to grind** - **Abrasive Requirements**: Premium aluminum oxide or ceramic alumina wheels - **Wheel Maintenance**: Frequent dressing required - **Coolant**: High-volume flood coolant essential - **Note**: High tungsten and cobalt content increase grinding difficulty #### **EDM Machining** - Suitable but challenging due to high alloy content - Generates significant recast layer requiring additional processing - Specialized parameters often required - Stress relief after roughing operations essential #### **Welding and Repair** - Difficult weldability requiring specialized procedures - Preheating to 400-500°C (750-930°F) essential - Post-weld heat treatment critical - Generally not recommended for repair except by specialists --- ### **Quality Assurance & Metallurgical Standards** #### **Microstructural Requirements** - **Carbide Distribution**: Uniform distribution of complex tungsten-rich carbides - **Grain Size**: ASTM 6 or finer - **Decarburization**: ≤0.25 mm per side on rough stock - **Non-Metallic Inclusions**: ASTM E45 Method A, ≤2.0 total rating - **Special Requirement**: Homogeneous carbide distribution critical for performance #### **Testing & Certification** - Full chemical analysis with emphasis on tungsten and cobalt verification - Hardness testing throughout production - Microstructural evaluation strongly recommended - Elevated temperature hardness testing available for critical applications - Standard material test reports with enhanced data for premium applications --- ### **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 | | **Forged Blanks** | Custom dimensions | Annealed | As-forged, Machined | --- ### **Technical Comparison** | Property | LSS™ H19 | H13 | H21 | H10 | |----------|-----------|-----|-----|-----| | **Hot Hardness** | **Exceptional** | Good | Excellent | Good | | **Wear Resistance** | **Exceptional** | Very Good | Excellent | Good | | **Toughness** | Moderate | Very Good | Fair | Very Good | | **Maximum Service Temperature** | **700°C** | 540°C | 650°C | 480°C | | **Machinability** | Difficult | Excellent | Fair | Very Good | | **Cost** | High | Moderate | High | Moderate | | **Primary Application** | Extreme temperature | Die casting | High-temp | General hot work | --- ### **Surface Treatment Compatibility** LSS™ H19 presents challenges for surface treatments but is compatible with: - **Nitriding**: Possible with specialized procedures - **PVD Coatings**: Suitable with proper surface preparation - **Specialized Coatings**: Various high-temperature coatings available - **Surface Engineering**: Limited options due to high alloy content --- ### **Economic Considerations** 1. **Material Cost**: High – premium grade with specialized applications 2. **Tool Life**: Exceptional in appropriate extreme-temperature applications 3. **Fabrication Cost**: High machining and grinding costs 4. **Application Specificity**: Only justified for the most demanding applications 5. **Overall Value**: Excellent for specific applications where no alternative exists --- ### **Technical Support** Latrobe provides specialized technical support for LSS™ H19: - **Application Engineering**: Expert guidance for extreme temperature applications - **Heat Treatment Support**: Specialized protocols for this challenging grade - **Troubleshooting**: Assistance with performance and fabrication issues - **Field Support**: Specialized support for critical applications --- **Select Latrobe LSS™ H19 Hot Work Tool Steel** for the most extreme temperature applications where conventional hot work steels cannot maintain sufficient hardness and wear resistance. This ultra-high tungsten-cobalt hot work steel provides reliable performance in the most demanding applications such as superalloy forging, high-temperature extrusion, and specialized hot work processes. LSS™ H19 represents a specialized solution for applications where extreme temperature performance is non-negotiable and where the unique combination of hot hardness, wear resistance, and red hardness is essential for success. When operating temperatures exceed the capabilities of conventional hot work steels and performance cannot be compromised, LSS™ H19 delivers the ultimate solution for extreme temperature tooling applications. -:- For detailed product information, please contact sales. -: Latrobe LSS™ H19 Hot Work Tool Steel (ASTM H19) Specification Dimensions Size： Diameter 20-1000 mm Length <7175 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™ H19 Hot Work Tool Steel (ASTM H19) Properties -:- For detailed product information, please contact sales. -:

Applications of Latrobe LSS™ H19 Hot Work Tool Steel Tube (ASTM H19) -:- For detailed product information, please contact sales. -: Chemical Identifiers Latrobe LSS™ H19 Hot Work Tool Steel Tube (ASTM H19) -:- For detailed product information, please contact sales. -:

Packing of Latrobe LSS™ H19 Hot Work Tool Steel Tube (ASTM H19) -:- 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 Tube 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 3646 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