Spherical Latrobe LSS™ A7 Mod. Wear-Resistant Tool Steel Powder (ASTM A7 Mod.)

Latrobe LSS™ A7 Mod. Wear-Resistant Tool Steel Spherical Powder (ASTM A7 Mod.) Product Information -:- For detailed product information, please contact sales. -: Latrobe LSS™ A7 Mod. Wear-Resistant Tool Steel Spherical Powder (ASTM A7 Mod.) Synonyms -:- For detailed product information, please contact sales. -: -:- For detailed product information, please contact sales. -: Spherical Latrobe LSS™ A7 Mod. Wear-Resistant Tool Steel Powder (ASTM A7 Mod.) characteristics -:- For detailed product information, please contact sales. -: Spherical Latrobe LSS™ A7 Mod. Wear-Resistant Tool Steel Powder (ASTM A7 Mod.) Particle Size -:- For detailed product information, please contact sales. -: -:- -:- 0-15μm ,5-25μm, 15-45μm, 15-53μm,20-63um, 45-75μm, 45-105μm, 45-150μm ,75-150μm. (Various granularities can be customized according to customer requirements) -:- For detailed product information, please contact sales. -:

Spherical Latrobe LSS™ A7 Mod. Wear-Resistant Tool Steel Powder (ASTM A7 Mod.) Applicable processes -:- For detailed product information, please contact sales. -: Laser/electron beam additive manufacturing (SLM/EBM, 3D printing) Direct laser deposition (DLD) Used in thermal spray (TSA) Powder hot isostatic pressing (HIP) Metal injection molding (MIM) Powder metallurgy (PM) Laser cladding (LC), etc. -:- For detailed product information, please contact sales. -: Spherical Latrobe LSS™ A7 Mod. Wear-Resistant Tool Steel Powder (ASTM A7 Mod.) Chemical Composition -:- For detailed product information, please contact sales. -: -:- For detailed product information, please contact sales. -: Latrobe LSS™ A7 Mod. Wear-Resistant Tool Steel (ASTM A7 Mod.) Product Information -:- For detailed product information, please contact sales. -: # **Latrobe LSS™ A7 Modified Wear-Resistant Tool Steel** ## **Enhanced High-Carbon, High-Vanadium Tool Steel for Extreme Abrasive Applications** Latrobe LSS™ A7 Modified represents an advanced evolution of the classic AISI A7 tool steel, engineered to deliver superior performance in the most demanding abrasive wear applications. Through refined chemistry control and enhanced processing techniques, this modified grade offers improved microstructural homogeneity, better toughness balance, and enhanced heat treatment response compared to standard A7. This premium material is specifically designed for applications where extreme abrasion resistance is paramount and conventional tool steels fail prematurely due to wear. --- ### **Key Features & Benefits** - **Exceptional Wear Resistance**: Optimized high vanadium content (4.5-5.5%) provides outstanding abrasion resistance through refined vanadium carbide distribution - **Enhanced Toughness**: Modified composition improves impact resistance while maintaining exceptional wear characteristics - **Improved Microstructural Homogeneity**: Advanced processing ensures uniform carbide distribution for consistent performance - **Better Heat Treatment Response**: Enhanced hardenability and dimensional stability during heat treatment - **Superior Edge Retention**: Maintains sharp cutting edges under severe abrasive conditions - **Reduced Grinding Difficulty**: Modified carbide characteristics improve grindability compared to standard A7 - **Extended Service Life**: Typically 20-40% longer tool life in equivalent abrasive applications --- ### **Chemical Composition (Typical %, Modified A7 Specification)** | Element | Carbon (C) | Chromium (Cr) | Vanadium (V) | Molybdenum (Mo) | Tungsten (W) | Special Modifications | |---------|------------|---------------|--------------|-----------------|--------------|-----------------------| | **Content** | 2.30 - 2.70 | 5.20 - 5.80 | 4.50 - 5.50 | 1.10 - 1.50 | 0.75 - 1.50 | Micro-alloy additions for carbide refinement and grain control | *Note: LSS™ A7 Modified maintains the fundamental high-carbon, high-vanadium philosophy of standard A7 while incorporating refined element balances and micro-alloying additions. The vanadium content is optimized to maximize hard vanadium carbide (MC type) formation while controlling carbide size and distribution for improved mechanical properties.* --- ### **Physical & Mechanical Properties** | Property | Value / Description | |----------|---------------------| | **Density** | 7.86 g/cm³ | | **Thermal Conductivity** | 19-23 W/m·K at 20°C | | **Specific Heat Capacity** | 0.46 kJ/kg·K at 20°C | | **Coefficient of Thermal Expansion** | 10.2 × 10⁻⁶/K (20-100°C) | | **Hardness (Annealed)** | 230-260 HB | | **Hardness (Heat Treated)** | **61-65 HRC** (optimized working range) | | **Tensile Strength** | 1,900-2,300 MPa (at 63 HRC) | | **Yield Strength** | 1,700-2,100 MPa (at 63 HRC) | | **Modulus of Elasticity** | 225-235 GPa | | **Impact Toughness** | Low-Moderate – improved over standard A7 | | **Compressive Strength** | 2,500-2,900 MPa (at 63 HRC) | | **Abrasion Resistance** | **Exceptional** – superior to standard A7 through refined microstructure | --- ### **Heat Treatment Guidelines** #### **Annealing** - **Temperature**: 870-900°C (1600-1650°F) - **Method**: Controlled slow furnace cool at ≤12°C (22°F) per hour to 600°C (1110°F) - **Resultant Hardness**: 230-260 HB - **Special Note**: Modified composition allows for more predictable annealing response #### **Stress Relieving** - **Temperature**: 650-700°C (1200-1290°F) - **Hold Time**: 2-3 hours per inch of thickness - **Cooling**: Slow furnace cool to 500°C (930°F), then air cool #### **Hardening (Precision Process Required)** 1. **Preheating**: **Critical** – 750-800°C (1380-1470°F) thorough equalization 2. **Austenitizing**: **970-1000°C (1775-1830°F)** – precise control ±5°C recommended 3. **Soak Time**: 20-40 minutes per inch of thickness 4. **Quenching**: **Oil quenching required**; specialized quenching oils recommended 5. **Immediate Handling**: Cool to 40-60°C (105-140°F) before proceeding #### **Tempering (Critical for Optimal Performance)** - **Temperature Range**: 180-550°C (355-1020°F) - **Cycles**: **Triple tempering mandatory** for modified grade - **Duration**: 2-3 hours per cycle, slow cool between cycles - **Target Hardness**: 61-65 HRC typically achieved at 180-250°C (355-480°F) - **Special Feature**: Improved tempering response with better toughness retention #### **Sub-Zero Treatment (Highly Recommended)** - **Application**: Essential for maximum dimensional stability and wear resistance - **Temperature**: -80 to -100°C (-112 to -148°F) - **Duration**: 3-4 hours - **Timing**: After quenching, before first temper - **Benefit**: Critical for transforming retained austenite and maximizing properties --- ### **International Standards & Specifications** | Standard | Grade Designation | Notes | |----------|-------------------|-------| | **ASTM** | A681 A7 Modified | Enhanced version of standard specification | | **Proprietary** | LSS™ A7 Modified | Latrobe Special Steel premium designation | | **Based On** | AISI A7 Enhanced | Improved version of classic A7 composition | | **Quality Standards** | Premium Wear Grade | Meets enhanced requirements for abrasive applications | | **Customer Specifications** | Various OEM standards | Exceeds requirements of major industrial manufacturers | --- ### **Typical Applications** #### **Extreme Abrasive Wear Applications** - **Brick, Tile, and Ceramic Molds**: For abrasive clay and ceramic materials - **Concrete and Cement Tooling**: Molds, forms, and processing tools - **Refractory Material Manufacturing**: Firebrick, kiln furniture, and high-temperature ceramics - **Abrasive Mineral Processing**: Tools for sand, gravel, limestone, and aggregates #### **Advanced Composite Processing** - **Carbon Fiber Composite Tooling**: Cutting, trimming, and machining tools - **Fiberglass and GFRP Processing**: Tools for reinforced plastic materials - **Ceramic Matrix Composite Tools**: For advanced ceramic composite materials - **Metal Matrix Composite Processing**: Tools for abrasive MMC materials #### **Industrial Cutting Applications** - **Shear Blades for Abrasive Materials**: Cutting fiberglass, composites, and abrasive metals - **Slitter Knives for Abrasive Coils**: For mineral-filled and reinforced materials - **Cut-off Tools and Saws**: For abrasive workpiece materials - **Pulverizer and Crusher Components**: Blades, hammers, and wear parts #### **Plastic and Rubber Processing** - **Extrusion Dies for Filled Plastics**: Glass-filled, mineral-filled, and reinforced polymers - **Injection Molds for Abrasive Compounds**: Highly filled plastic materials - **Rubber Molding Tools**: For abrasive rubber compounds and fillers - **Compounding Equipment**: Screws, barrels, and mixing components #### **Specialized Industrial Applications** - **Wear Plates and Liners**: For abrasive material handling and processing - **Nozzles and Wear Parts**: For abrasive slurry and powder applications - **Mining and Mineral Processing**: Tools for ore processing and handling - **Recycling Equipment**: Components for processing abrasive recycled materials --- ### **Machining & Fabrication Notes** #### **Machinability (Annealed Condition)** - **Rating**: 25-35% of B1112 free-machining steel – **very difficult** - **Recommended Tools**: **Premium carbide tools essential** – grades for hard machining - **Cutting Speeds**: 6-12 m/min (20-40 SFM) for turning operations - **Feed Rates**: Very light feeds with sharp, positive geometries - **Coolant**: High-performance synthetic coolant essential - **Special Advantage**: More consistent machining than standard A7 #### **Grindability** - **Relative Rating**: 30-40 (vs. 100 for annealed O1 tool steel) – **difficult but improved** - **Abrasive Requirements**: **Diamond or CBN wheels strongly recommended** - **Wheel Maintenance**: Frequent dressing with optimized techniques - **Coolant**: High-pressure flood coolant essential - **Key Improvement**: 20-30% better grindability than standard A7 #### **EDM Machining** - Challenging but more consistent than standard A7 - Generates hard recast layer requiring post-processing - Specialized parameters for optimal results - Stress relief after roughing operations essential #### **Polishing and Finishing** - Challenging due to hard carbide structure - Diamond compounds required for optimal results - Can achieve good finishes with proper technique - Specialized processes recommended for critical surfaces --- ### **Quality Assurance & Enhanced Metallurgical Standards** #### **Enhanced Microstructural Requirements** - **Carbide Distribution**: Extremely uniform, fine carbide dispersion - **Maximum Carbide Size**: Strictly controlled ≤8 microns - **Grain Size**: ASTM 7 or finer - **Decarburization**: ≤0.10 mm per side on finished products - **Non-Metallic Inclusions**: ASTM E45 Method D, ≤1.0 total rating - **Microcleanliness**: Enhanced standards for premium applications #### **Testing & Certification** - Complete chemical analysis with tight tolerance verification - Hardness testing at multiple production stages - Comprehensive microstructural analysis including carbide characterization - Wear testing data available for qualification - Ultrasonic testing for critical applications - Full traceability with enhanced documentation package --- ### **Available Product Forms** | Form | Standard Sizes | Condition | Surface Finish | Quality Features | |------|---------------|-----------|----------------|------------------| | **Round Bars** | 15-250mm diameter | Annealed | Precision Ground | UT tested, certified | | **Flat Bars and Plate** | 10-150mm thickness | Annealed | Ground & Machined | Enhanced flatness control | | **Blocks** | Custom dimensions | Annealed | Precision Machined | Stress relieved available | | **Forged Blanks** | Customer specifications | Annealed | As-forged, Machined | Optimized grain flow | --- ### **Technical Comparison: A7 Modified vs. Standard A7** | Property | LSS™ A7 Modified | Standard A7 | Improvement | |----------|------------------|-------------|-------------| | **Wear Resistance** | **Superior** | Excellent | 15-25% | | **Impact Toughness** | Low-Moderate | **Low** | 30-50% improvement | | **Microstructural Uniformity** | **Excellent** | Good | Significant improvement | - **Grindability** | Difficult | **Extremely Difficult** | 20-30% better | - **Heat Treatment Response** | **More Predictable** | Variable | Major advantage | - **Service Life** | **Extended** | Good | 20-40% longer | - **Cost Premium** | 25-40% | Baseline | - | --- ### **Surface Treatment Compatibility** LSS™ A7 Modified presents challenges but offers improved compatibility: - **Nitriding**: Specialized high-temperature procedures required - **PVD Coatings**: Good adhesion with advanced surface preparation - **Specialized Coatings**: Various proprietary treatments available - **Surface Engineering**: Limited but improved options over standard A7 --- ### **Economic Considerations** 1. **Material Cost**: 25-40% premium over standard A7 2. **Tool Life**: Typically 20-40% longer in equivalent applications 3. **Fabrication Cost**: Reduced grinding time and improved yields 4. **Reduced Failures**: More predictable performance reduces unexpected failures 5. **Total Cost of Ownership**: Often lower despite higher initial cost 6. **Productivity Impact**: Extended tool life reduces changeover downtime --- ### **Technical Support & Premium Services** Latrobe provides comprehensive technical support for LSS™ A7 Modified: - **Application Engineering**: Expert consultation for extreme wear applications - **Heat Treatment Development**: Custom protocols for specific requirements - **Performance Testing**: Wear testing and validation services - **Failure Analysis**: Premium metallurgical investigation capabilities - **Training Programs**: Specialized workshops on abrasive wear materials - **Field Support**: On-site technical assistance for critical applications --- **Select Latrobe LSS™ A7 Modified Wear-Resistant Tool Steel** when standard A7 cannot meet the demanding requirements of modern abrasive applications or when improved toughness and more predictable performance are needed. This enhanced grade delivers superior wear resistance through refined microstructural control while offering better toughness and more consistent behavior than the classic A7 composition. For applications involving extreme abrasive wear from ceramics, composites, minerals, or highly filled materials, LSS™ A7 Modified provides the technological edge that extends tool life, improves reliability, and reduces total operating costs. When abrasion is the primary failure mode and conventional materials fail prematurely, LSS™ A7 Modified represents the intelligent investment in premium wear-resistant tool steel technology that delivers measurable performance improvements and operational benefits. -:- For detailed product information, please contact sales. -: Latrobe LSS™ A7 Mod. Wear-Resistant Tool Steel (ASTM A7 Mod.) Specification Dimensions Size： Diameter 20-1000 mm Length <7187 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™ A7 Mod. Wear-Resistant Tool Steel (ASTM A7 Mod.) Properties -:- For detailed product information, please contact sales. -:

Spherical Latrobe LSS™ A7 Mod. Wear-Resistant Tool Steel Powder (ASTM A7 Mod.) Particle Size Description -:- For detailed product information, please contact sales. -: Applications of Spherical Latrobe LSS™ A7 Mod. Wear-Resistant Tool Steel Powder (ASTM A7 Mod.) -:- For detailed product information, please contact sales. -: -:- For detailed product information, please contact sales. -: Applications of Latrobe LSS™ A7 Mod. Wear-Resistant Tool Steel Spherical Powder (ASTM A7 Mod.) -:- For detailed product information, please contact sales. -: Chemical Identifiers Latrobe LSS™ A7 Mod. Wear-Resistant Tool Steel Spherical Powder (ASTM A7 Mod.) -:- For detailed product information, please contact sales. -:

Packing of Latrobe LSS™ A7 Mod. Wear-Resistant Tool Steel Spherical Powder (ASTM A7 Mod.) -:- 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 Spherical Powder 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 3658 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