Latrobe,LSS™ H14 Tool Steel Rod/Bar (ASTM H14)

Latrobe LSS™ H14 Tool Steel Rod (ASTM H14) Product Information -:- For detailed product information, please contact sales. -: Latrobe LSS™ H14 Tool Steel Rod (ASTM H14) Synonyms -:- For detailed product information, please contact sales. -:

Latrobe LSS™ H14 Tool Steel (ASTM H14) Product Information -:- For detailed product information, please contact sales. -: # **Latrobe LSS™ H14 Hot Work Tool Steel** ## **High-Tungsten Chromium Hot Work Steel for Extreme Temperature Applications** Latrobe LSS™ H14 is a premium high-tungsten chromium hot work tool steel designed for exceptional performance in extreme temperature applications where superior hot hardness and wear resistance are paramount. As an ASTM H14 grade, it offers outstanding resistance to softening at elevated temperatures, making it particularly suitable for hot forging, piercing, and extrusion applications involving high-temperature alloys and challenging materials. This specialized grade represents an optimal choice for applications where tools must maintain hardness and wear resistance under severe thermal conditions. --- ### **Key Features & Benefits** - **Exceptional Hot Hardness**: Superior resistance to softening at temperatures up to 650°C (1200°F) - **Excellent Wear Resistance**: High tungsten content provides outstanding abrasion resistance in hot working conditions - **Good High-Temperature Strength**: Maintains mechanical properties under extreme thermal loading - **Moderate Toughness**: Balanced combination of hardness and impact resistance for high-temperature applications - **Good Dimensional Stability**: Reasonable stability during heat treatment and in service - **Specialized Application Focus**: Optimized for specific high-temperature hot work processes --- ### **Chemical Composition (Typical %, ASTM A681 H14)** | Element | Carbon (C) | Tungsten (W) | Chromium (Cr) | Vanadium (V) | Silicon (Si) | Manganese (Mn) | |---------|------------|--------------|---------------|--------------|--------------|----------------| | **Content** | 0.35 - 0.45 | 4.00 - 5.25 | 4.00 - 5.00 | 0.40 - 0.60 | 0.80 - 1.20 | 0.20 - 0.60 | *Note: LSS™ H14 features a distinctive high-tungsten composition that provides exceptional hot hardness and wear resistance. The tungsten content, combined with chromium and vanadium, creates a material particularly suited for applications where tools are exposed to extreme temperatures while maintaining cutting or forming edges.* --- ### **Physical & Mechanical Properties** | Property | Value / Description | |----------|---------------------| | **Density** | 8.00 g/cm³ | | **Thermal Conductivity** | 23-27 W/m·K at 20°C | | **Specific Heat Capacity** | 0.45 kJ/kg·K at 20°C | | **Coefficient of Thermal Expansion** | 10.8 × 10⁻⁶/K (20-400°C) | | **Hardness (Annealed)** | 201-229 HB | | **Hardness (Heat Treated)** | **46-52 HRC** (typical working range) | | **Hot Hardness Retention** | Maintains good hardness up to 650°C (1200°F) | | **Tensile Strength** | 1,650-2,000 MPa (at 49 HRC) | | **Yield Strength** | 1,450-1,800 MPa (at 49 HRC) | | **Modulus of Elasticity** | 210-220 GPa | | **Impact Toughness** | Moderate – balanced for high-temperature applications | --- ### **Heat Treatment Guidelines** #### **Annealing** - **Temperature**: 870-900°C (1600-1650°F) - **Method**: Slow furnace cool at ≤22°C (40°F) per hour to 600°C (1110°F), then air cool - **Resultant Hardness**: 201-229 HB #### **Stress Relieving** - **Temperature**: 650-680°C (1200-1255°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. **Intermediate Preheat**: 850-900°C (1560-1650°F) – recommended for complex tools 3. **Austenitizing**: **1030-1070°C (1885-1960°F)** – higher temperature required due to tungsten content 4. **Soak Time**: 20-40 minutes per inch of thickness 5. **Quenching**: Oil quenching preferred; air cooling suitable for thin sections 6. **Immediate Handling**: Cool to 50-65°C (120-150°F) before tempering #### **Tempering** - **Temperature Range**: 540-650°C (1005-1200°F) - **Cycles**: Double tempering recommended for dimensional stability - **Duration**: 2 hours per cycle minimum, air cool between cycles - **Target Hardness**: 46-52 HRC typically achieved at 560-620°C (1040-1150°F) - **Special Note**: Higher tempering temperatures often used to optimize toughness --- ### **International Standards & Equivalent Grades** | Standard | Grade Designation | Notes | |----------|-------------------|-------| | **ASTM** | A681 H14 | Primary specification (UNS T20814) | | **ISO** | 35WCrV7 | ISO 4957 designation | | **DIN** | 1.2606 / X30WCrV9-3 | German standard (similar composition) | | **JIS** | SKD5 | Japanese industrial standard | | **AFNOR** | 35WCrV7 | French association standard | | **GB** | 4Cr4W4MoV | Chinese equivalent | | **UNS** | T20814 | Unified Numbering System | --- ### **Typical Applications** #### **Hot Forging and Piercing** - **Hot Piercing Punches**: For tube and shell manufacturing - **Forging Dies for High-Temperature Alloys**: Nickel-based superalloys, titanium - **Hot Trimming and Punching Dies**: For high-temperature materials - **Mandrels for Hot Working**: Subject to extreme thermal and mechanical stresses #### **Extrusion Applications** - **Copper and Brass Extrusion Dies**: Where high temperatures are encountered - **Steel Extrusion Components**: Particularly for high-alloy steels - **Hot Extrusion Tooling**: For challenging materials requiring extreme hot hardness #### **Specialized Hot Work Applications** - **Hot Shear Blades**: For cutting high-temperature materials - **Hot Forming Tools**: For high-temperature metal forming operations - **Glass Molding Tools**: For specialty glass forming at elevated temperatures #### **Aerospace and Special Alloy Processing** - **Superalloy Forging Dies**: For aerospace components - **Titanium Processing Tools**: Where high temperatures are maintained - **Specialty Metal Forming**: For refractory and high-temperature alloys --- ### **Machining & Fabrication Notes** #### **Machinability (Annealed Condition)** - **Rating**: 50-60% of B1112 free-machining steel - **Recommended Tools**: Carbide tools recommended for production machining - **Cutting Speeds**: 15-25 m/min (50-80 SFM) for turning operations - **Feed Rates**: Moderate feeds with good chip control - **Coolant**: Heavy-duty soluble oil or synthetic coolant recommended #### **Grindability** - **Relative Rating**: 60-70 (vs. 100 for annealed O1 tool steel) - **Abrasive Recommendations**: Aluminum oxide or ceramic alumina wheels - **Wheel Maintenance**: Regular dressing recommended - **Coolant**: Adequate coolant flow important - **Note**: Higher tungsten content increases grinding difficulty compared to standard H13 #### **EDM Machining** - Suitable for wire and sinker EDM operations - Standard EDM parameters apply - Stress relief after roughing operations recommended - Good surface finish achievable with proper settings #### **Welding and Repair** - Moderate weldability with proper procedures - Preheating to 350-450°C (660-840°F) essential - Post-weld heat treatment mandatory - Suitable for repair of specialized hot work tools --- ### **Quality Assurance & Metallurgical Standards** #### **Microstructural Requirements** - **Carbide Distribution**: Uniform distribution of 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, ≤2.5 total rating #### **Testing & Certification** - Full chemical analysis verification - Hardness testing throughout production - Microstructural evaluation available upon request - Standard material test reports with shipments --- ### **Available Product Forms** | Form | Standard Sizes | Condition | Surface Finish | |------|---------------|-----------|---------------| | **Round Bars** | 10mm - 400mm diameter | Annealed | Black, Peeled, Ground | | **Flat Bars and Plate** | 10-200mm thickness | Annealed | Mill, Ground | | **Blocks** | Various dimensions | Annealed | Rough or finish machined | | **Forged Blanks** | Custom dimensions | Annealed | As-forged, Machined | --- ### **Technical Comparison** | Property | LSS™ H14 | H13 | H21 | H10 | |----------|-----------|-----|-----|-----| | **Hot Hardness** | **Excellent** | Good | Excellent | Good | | **Wear Resistance** | **Excellent** | Very Good | Excellent | Good | | **Toughness** | Moderate | Very Good | Fair | Very Good | | **Thermal Fatigue Resistance** | Good | Excellent | Fair | Very Good | | **Machinability** | Moderate | Excellent | Fair | Very Good | | **Primary Application** | High-temp forging | Die casting | High-temp forming | General hot work | --- ### **Surface Treatment Compatibility** LSS™ H14 is compatible with various surface treatments: - **Nitriding**: Gas, plasma, or salt bath nitriding for enhanced surface hardness - **Coatings**: PVD coatings (TiN, TiAlN) for specific applications - **Surface Engineering**: Various treatments to enhance high temperature performance --- ### **Economic Considerations** 1. **Material Cost**: Moderate to high – specialized grade with specific applications 2. **Tool Life**: Excellent service life in appropriate high-temperature applications 3. **Application Specificity**: Best suited for specialized high-temperature processes 4. **Overall Value**: Excellent for specific applications where its properties are required --- ### **Technical Support** Latrobe provides technical support for LSS™ H14 applications: - **Application Engineering**: Guidance on appropriate applications and heat treatment - **Troubleshooting**: Assistance with tool performance issues - **Heat Treatment Support**: Protocols for optimal performance - **Field Support**: Specialized support for high-temperature applications --- **Select Latrobe LSS™ H14 Hot Work Tool Steel** for specialized applications requiring exceptional hot hardness and wear resistance at extreme temperatures. This high-tungsten chromium hot work steel provides reliable performance in demanding applications such as hot piercing, high-temperature forging, and extrusion of challenging materials. LSS™ H14 represents a specialized solution for applications where conventional hot work steels cannot maintain sufficient hardness under severe thermal conditions. When extreme temperature performance is the primary requirement and moderate toughness is acceptable, LSS™ H14 delivers proven performance in specialized hot work applications. -:- For detailed product information, please contact sales. -: Latrobe LSS™ H14 Tool Steel (ASTM H14) Specification Dimensions Size： Diameter 20-1000 mm Length <7174 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™ H14 Tool Steel (ASTM H14) Properties -:- For detailed product information, please contact sales. -:

Applications of Latrobe LSS™ H14 Tool Steel Rod (ASTM H14) -:- For detailed product information, please contact sales. -: Chemical Identifiers Latrobe LSS™ H14 Tool Steel Rod (ASTM H14) -:- For detailed product information, please contact sales. -:

Packing of Latrobe LSS™ H14 Tool Steel Rod (ASTM H14) -:- 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 Rod 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 3645 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