Latrobe,LSS™ H10 Hot Work Tool Steel Tube,Pipe (ASTM H10)

Latrobe LSS™ H10 Hot Work Tool Steel Tube (ASTM H10) Product Information -:- For detailed product information, please contact sales. -: Latrobe LSS™ H10 Hot Work Tool Steel Tube (ASTM H10) Synonyms -:- For detailed product information, please contact sales. -:

Latrobe LSS™ H10 Hot Work Tool Steel (ASTM H10) Product Information -:- For detailed product information, please contact sales. -: # **Latrobe LSS™ H10 Hot Work Tool Steel** ## **Premium Molybdenum-Base Hot Work Steel for High-Temperature Service** Latrobe LSS™ H10 is a premium molybdenum-base hot work tool steel designed for exceptional performance in high-temperature applications. As an ASTM H10 grade, it offers an optimal balance of high-temperature strength, thermal fatigue resistance, and toughness, making it particularly suitable for aluminum die casting, extrusion, and forging applications. This alloy represents a specialized solution for tooling that must withstand repeated thermal cycling while maintaining dimensional stability and resisting heat checking. --- ### **Key Features & Benefits** - **Excellent Thermal Fatigue Resistance**: Withstands repeated heating and cooling cycles without cracking or heat checking - **Good High-Temperature Strength**: Maintains mechanical properties at elevated operating temperatures (up to 540°C/1000°F) - **Superior Toughness**: Good impact resistance at both room and elevated temperatures - **Good Wear Resistance**: Adequate abrasion resistance for many hot work applications - **Moderate Alloy Content**: Cost-effective solution compared to higher-alloy hot work steels - **Good Machinability**: Relatively easy to machine in the annealed condition --- ### **Chemical Composition (Typical %, ASTM A681 H10)** | Element | Carbon (C) | Molybdenum (Mo) | Chromium (Cr) | Vanadium (V) | Silicon (Si) | Manganese (Mn) | |---------|------------|-----------------|---------------|--------------|--------------|----------------| | **Content** | 0.35 - 0.45 | 2.75 - 3.25 | 3.00 - 3.75 | 0.25 - 0.50 | 0.80 - 1.20 | 0.25 - 0.70 | *Note: LSS™ H10 features a balanced composition with moderate alloying elements that provide good hot strength without excessive cost. The molybdenum content is critical for high-temperature performance, while controlled vanadium enhances wear resistance.* --- ### **Physical & Mechanical Properties** | Property | Value / Description | |----------|---------------------| | **Density** | 7.84 g/cm³ | | **Thermal Conductivity** | 28-32 W/m·K at 20°C | | **Specific Heat Capacity** | 0.46 kJ/kg·K at 20°C | | **Coefficient of Thermal Expansion** | 11.5 × 10⁻⁶/K (20-400°C) | | **Hardness (Annealed)** | 192-229 HB | | **Hardness (Heat Treated)** | **42-48 HRC** (typical working range) | | **Tensile Strength** | 1,550-1,850 MPa (at 45 HRC) | | **Yield Strength** | 1,400-1,650 MPa (at 45 HRC) | | **Modulus of Elasticity** | 205-215 GPa | | **Impact Toughness** | Very Good – optimized for thermal shock resistance | --- ### **Heat Treatment Guidelines** #### **Annealing** - **Temperature**: 845-870°C (1555-1600°F) - **Method**: Slow furnace cool at ≤22°C (40°F) per hour to 600°C (1110°F), then air cool - **Resultant Hardness**: 192-229 HB #### **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**: **1000-1040°C (1830-1905°F)** – precise control recommended 3. **Soak Time**: 20-30 minutes per inch of thickness 4. **Quenching**: Air cooling sufficient for most applications; oil for maximum hardness 5. **Immediate Handling**: Cool to 50-65°C (120-150°F) before tempering #### **Tempering** - **Temperature Range**: 540-650°C (1005-1200°F) – depending on required hardness - **Cycles**: Double tempering recommended for dimensional stability - **Duration**: 2 hours per cycle minimum, air cool between cycles - **Target Hardness**: 42-48 HRC typically achieved at 540-600°C (1005-1110°F) --- ### **International Standards & Equivalent Grades** | Standard | Grade Designation | Notes | |----------|-------------------|-------| | **ASTM** | A681 H10 | Primary specification (UNS T20810) | | **ISO** | 30CrMoV12-9 | ISO 4957 designation | | **DIN** | 1.2365 / 32CrMoV12-28 | German standard | | **JIS** | SKD7 | Japanese industrial standard | | **AFNOR** | 32CDV12-09 | French association standard | | **GB** | 4Cr5MoSiV1 | Chinese equivalent (approximate) | | **UNS** | T20810 | Unified Numbering System | --- ### **Typical Applications** #### **Die Casting Tooling** - **Aluminum Die Casting Dies**: Core pins, cavities, inserts, and ejector pins - **Hot Chambers**: Components for zinc and magnesium die casting - **Shot Sleeves**: For aluminum and magnesium casting - **Plunger Tips**: For aluminum die casting machines #### **Extrusion Tooling** - **Aluminum Extrusion Dies**: Profile dies, feeder plates, and backers - **Extrusion Mandrels**: For tube and hollow profile extrusion - **Containers and Liners**: For aluminum extrusion presses #### **Forging Applications** - **Hammer and Press Dies**: For steel and non-ferrous forging - **Die Inserts**: For forging dies requiring thermal fatigue resistance - **Punches and Mandrels**: For hot forging operations #### **Plastic Molding** - **Hot Runner Systems**: Nozzles, manifolds, and tips - **Molds for High-Temperature Plastics**: Such as PEEK, PPS, and LCP #### **General Hot Work Applications** - **Hot Shear Blades**: For cutting hot materials - **Hot Forming Tools**: For various metal forming operations - **Glass Molding Tools**: For glass forming applications --- ### **Machining & Fabrication Notes** #### **Machinability (Annealed Condition)** - **Rating**: 60-70% of B1112 free-machining steel - **Recommended Tools**: HSS or carbide tools both suitable - **Cutting Speeds**: 20-30 m/min (65-100 SFM) for turning operations - **Feed Rates**: Moderate feeds with standard tool geometries - **Coolant**: Standard soluble oils adequate #### **Grindability** - **Relative Rating**: 70-80 (vs. 100 for annealed O1 tool steel) - **Abrasive Recommendations**: Standard aluminum oxide wheels - **Wheel Maintenance**: Normal dressing intervals sufficient - **Coolant**: Standard grinding coolant adequate #### **EDM Machining** - Well-suited for wire and sinker EDM operations - Standard EDM parameters apply - Stress relief after roughing operations recommended --- ### **Quality Assurance & Metallurgical Standards** #### **Microstructural Requirements** - **Carbide Distribution**: Fine, uniformly distributed 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 - 500mm diameter | Annealed | Black, Peeled, Ground | | **Flat Bars** | 10-300mm thickness | Annealed | Mill, Ground | | **Blocks** | Various dimensions | Annealed | Rough machined | | **Forged Blanks** | Custom dimensions | Annealed | As-forged, Machined | | **Plate** | 10-200mm thickness | Annealed | Ground, Mill finish | --- ### **Technical Comparison** | Property | LSS™ H10 | H13 | H11 | H21 | |----------|-----------|-----|-----|-----| | **Thermal Fatigue Resistance** | Very Good | Excellent | Good | Fair | | **High-Temperature Strength** | Good | Very Good | Good | Excellent | | **Toughness** | Very Good | Good | Very Good | Fair | | **Wear Resistance** | Good | Very Good | Good | Excellent | | **Cost Effectiveness** | **Excellent** | Good | Good | Fair | | **Primary Application** | Al die casting | Versatile hot work | Forging | High-temp forming | --- ### **Special Considerations for Hot Work Applications** 1. **Surface Treatments**: Nitriding and other surface treatments can enhance performance 2. **Preheating**: Tools should be preheated before use in hot work applications 3. **Temperature Management**: Avoid rapid temperature changes during service 4. **Maintenance**: Regular inspection and maintenance prolong tool life --- ### **Economic Considerations** 1. **Material Cost**: Moderate – cost-effective for many hot work applications 2. **Tool Life**: Good service life in appropriate applications 3. **Maintenance Cost**: Moderate maintenance requirements 4. **Overall Value**: Excellent performance-to-cost ratio for aluminum die casting and similar applications --- ### **Storage & Handling** 1. **Storage Conditions**: Standard warehouse conditions acceptable 2. **Corrosion Protection**: Standard rust preventive adequate 3. **Handling**: Normal material handling procedures apply 4. **Identification**: Clearly marked with grade and heat number 5. **Shelf Life**: Standard industrial storage life with basic protection --- ### **Technical Support** Latrobe provides technical support for LSS™ H10 applications: - **Application Engineering**: Guidance on tool design and heat treatment - **Troubleshooting**: Assistance with tool performance issues - **Heat Treatment Support**: Protocols for optimal performance - **Field Support**: On-site technical assistance available --- **Select Latrobe LSS™ H10 Hot Work Tool Steel** for applications requiring good high-temperature performance with excellent toughness and thermal fatigue resistance. This molybdenum-base hot work steel provides a cost-effective solution for aluminum die casting, extrusion dies, and forging applications where thermal cycling is a primary concern. LSS™ H10 represents an optimal balance of performance, manufacturability, and cost for many hot work tooling applications, offering reliable service life and good resistance to heat checking and thermal fatigue. For tooling exposed to moderate high-temperature service with significant thermal cycling, LSS™ H10 delivers proven performance and excellent value. -:- For detailed product information, please contact sales. -: Latrobe LSS™ H10 Hot Work Tool Steel (ASTM H10) Specification Dimensions Size： Diameter 20-1000 mm Length <7164 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™ H10 Hot Work Tool Steel (ASTM H10) Properties -:- For detailed product information, please contact sales. -:

Applications of Latrobe LSS™ H10 Hot Work Tool Steel Tube (ASTM H10) -:- For detailed product information, please contact sales. -: Chemical Identifiers Latrobe LSS™ H10 Hot Work Tool Steel Tube (ASTM H10) -:- For detailed product information, please contact sales. -:

Packing of Latrobe LSS™ H10 Hot Work Tool Steel Tube (ASTM H10) -:- 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 3635 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