Spherical Latrobe LSS™ MGR™ Tool Steel Powder (ASTM A8)

Latrobe LSS™ MGR™ Tool Steel Spherical Powder (ASTM A8) Product Information -:- For detailed product information, please contact sales. -: Latrobe LSS™ MGR™ Tool Steel Spherical Powder (ASTM A8) Synonyms -:- For detailed product information, please contact sales. -: -:- For detailed product information, please contact sales. -: Spherical Latrobe LSS™ MGR™ Tool Steel Powder (ASTM A8) characteristics -:- For detailed product information, please contact sales. -: Spherical Latrobe LSS™ MGR™ Tool Steel Powder (ASTM A8) 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™ MGR™ Tool Steel Powder (ASTM A8) 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™ MGR™ Tool Steel Powder (ASTM A8) Chemical Composition -:- For detailed product information, please contact sales. -: -:- For detailed product information, please contact sales. -: Latrobe LSS™ MGR™ Tool Steel (ASTM A8) Product Information -:- For detailed product information, please contact sales. -: # **Latrobe LSS™ MGR™ Tool Steel** ## **Premium Molybdenum-Tungsten Air-Hardening Tool Steel for Superior Dimensional Stability** Latrobe LSS™ MGR™ represents a premium molybdenum-tungsten alloy air-hardening tool steel that offers exceptional dimensional stability, good wear resistance, and excellent toughness. As an ASTM A8 grade, this specialized tool steel is engineered for applications requiring minimal distortion during heat treatment combined with balanced mechanical properties for demanding tooling applications. The "MGR" designation reflects its optimized composition for superior performance in precision tooling applications. --- ### **Key Features & Benefits** - **Exceptional Dimensional Stability**: Minimal distortion during heat treatment with predictable size changes - **Air-Hardening Capability**: Can be hardened in air, reducing quenching stresses and distortion risks - **Good Wear Resistance**: Balanced carbide structure provides adequate abrasion resistance for many applications - **Excellent Toughness**: Superior impact resistance compared to many high-carbon tool steels - **Good Machinability**: Reasonable machining characteristics in the annealed condition - **Deep Hardening Characteristics**: Good through-hardening in moderate to heavy sections - **Versatile Heat Treatment**: Can be oil quenched for maximum hardness when required --- ### **Chemical Composition (Typical %, ASTM A681 A8)** | Element | Carbon (C) | Molybdenum (Mo) | Tungsten (W) | Chromium (Cr) | Vanadium (V) | Silicon (Si) | Manganese (Mn) | |---------|------------|-----------------|--------------|---------------|--------------|--------------|----------------| | **Content** | 0.55 - 0.65 | 1.30 - 1.80 | 1.30 - 1.80 | 4.75 - 5.50 | 1.00 - 1.50 | 0.80 - 1.20 | 0.20 - 0.50 | *Note: LSS™ MGR™ features a balanced molybdenum-tungsten-chromium-vanadium composition that provides excellent hardenability with good dimensional stability. The combination of molybdenum and tungsten enhances hot hardness and wear resistance while maintaining good toughness characteristics.* --- ### **Physical & Mechanical Properties** | Property | Value / Description | |----------|---------------------| | **Density** | 7.85 g/cm³ | | **Thermal Conductivity** | 25-30 W/m·K at 20°C | | **Specific Heat Capacity** | 0.46 kJ/kg·K at 20°C | | **Coefficient of Thermal Expansion** | 10.8 × 10⁻⁶/K (20-100°C) | | **Hardness (Annealed)** | 200-235 HB | | **Hardness (Heat Treated)** | **56-62 HRC** (typical working range) | | **Tensile Strength** | 1,900-2,300 MPa (at 59 HRC) | | **Yield Strength** | 1,700-2,100 MPa (at 59 HRC) | | **Modulus of Elasticity** | 210-220 GPa | | **Impact Toughness** | Very Good – superior to many air-hardening tool steels | | **Size Change During Hardening** | Typically ≤0.1% (minimal) | | **Compressive Strength** | 2,200-2,600 MPa (at 59 HRC) | --- ### **Heat Treatment Guidelines** #### **Annealing** - **Temperature**: 845-870°C (1555-1600°F) - **Method**: Slow furnace cool at ≤20°C (36°F) per hour to 600°C (1110°F), then air cool - **Resultant Hardness**: 200-235 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 (Air or Oil Quenching Options)** 1. **Preheating**: 650-750°C (1200-1380°F) – thorough equalization 2. **Austenitizing**: **1010-1040°C (1850-1905°F)** – typically 1020-1030°C (1865-1885°F) 3. **Soak Time**: 20-40 minutes per inch of thickness 4. **Quenching**: **Air cooling standard**; oil quenching for maximum hardness 5. **Immediate Handling**: Cool to below 65°C (150°F) before tempering #### **Tempering** - **Temperature Range**: 175-540°C (350-1000°F) - **Cycles**: Double tempering recommended for dimensional stability - **Duration**: 2 hours per cycle minimum, air cool between cycles - **Target Hardness**: 56-62 HRC typically achieved at 175-230°C (350-450°F) - **Special Note**: Higher tempering temperatures provide increased toughness with reduced hardness #### **Sub-Zero Treatment (Optional)** - **Application**: Recommended for maximum dimensional stability - **Temperature**: -80 to -100°C (-112 to -148°F) - **Duration**: 2-3 hours - **Timing**: After quenching, before tempering - **Benefit**: Enhanced dimensional stability and slightly increased hardness --- ### **International Standards & Equivalent Grades** | Standard | Grade Designation | Notes | |----------|-------------------|-------| | **ASTM** | A681 A8 | Primary specification (UNS T30108) | | **ISO** | Not directly equivalent | Similar to molybdenum-tungsten tool steels | | **DIN** | Not directly equivalent | German standards lack direct equivalent | | **JIS** | Not directly equivalent | Japanese standards lack direct equivalent | | **AFNOR** | Not directly equivalent | French standards lack direct equivalent | | **Proprietary** | LSS™ MGR™ | Latrobe Special Steel designation | | **Similar Grades** | Various air-hardening tool steels | Comparable to premium A8 variants | --- ### **Typical Applications** #### **Precision Forming and Blanking Tools** - **Blanking and Piercing Dies**: For sheet metal up to 6mm (0.25") thickness - **Forming Dies and Punches**: For bending, drawing, and forming operations - **Progressive Dies**: Where dimensional stability is critical across multiple stations - **Shear Blades**: For cutting sheet metal and plate #### **Plastic and Rubber Molding** - **Plastic Injection Molds**: For engineering plastics and high-volume production - **Compression Molds**: For plastic and rubber molding applications - **Extrusion Dies**: For plastic profile extrusion - **Die Casting Cores and Inserts**: For non-ferrous applications #### **Precision Tools and Gauges** - **Measuring Instruments**: Calipers, micrometers, and precision gauges - **Jigs and Fixtures**: Precision holding and locating devices - **Template and Pattern Tools**: For replication and checking - **Master Gauges**: Reference gauges and setting standards #### **Cutting Tools and Machine Components** - **Cut-off Tools**: For lathes and automatic screw machines - **Thread Rolling Dies**: For thread forming applications - **Machine Tool Components**: Slides, ways, and guide components - **Tool Holders**: For machining centers and lathes #### **Specialized Applications** - **Woodworking Tools**: Knives, blades, and cutting tools - **Paper Cutting Tools**: For paper and cardboard cutting - **Textile Industry Tools**: Cutting blades and components - **Food Processing Equipment**: Cutting blades and components --- ### **Machining & Fabrication Notes** #### **Machinability (Annealed Condition)** - **Rating**: 50-60% 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 good chip control - **Coolant**: Heavy-duty soluble oil or synthetic coolant recommended - **Advantage**: Reasonable machinability for an air-hardening tool steel #### **Grindability** - **Relative Rating**: 60-70 (vs. 100 for annealed O1 tool steel) - **Abrasive Recommendations**: Aluminum oxide wheels - **Wheel Maintenance**: Regular dressing recommended - **Coolant**: Adequate coolant flow important - **Surface Finish**: Good surface quality achievable #### **EDM Machining** - Excellent suitability for wire and sinker EDM - Good surface finish achievable - Standard EDM parameters apply - Stress relief after roughing operations recommended #### **Welding and Repair** - Moderate weldability with proper procedures - Preheating to 300-400°C (570-750°F) recommended - Post-weld heat treatment essential - Suitable for repair of tools and dies --- ### **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 - Dimensional stability testing available - Microstructural evaluation available upon request - Standard material test reports with shipments --- ### **Available Product Forms** | Form | Standard Sizes | Condition | Surface Finish | |------|---------------|-----------|---------------| | **Round Bars** | 10-300mm 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™ MGR™ (A8) | A2 | A6 | D2 | |----------|-----------------|----|----|----| | **Dimensional Stability** | **Excellent** | Very Good | Excellent | Good | | **Toughness** | Very Good | Good | Good | Fair | | **Wear Resistance** | Good | Good | Moderate | **Excellent** | | **Hardness Potential** | 56-62 HRC | 57-62 HRC | 57-62 HRC | 58-62 HRC | | **Machinability** | Good | Good | Good | Fair | - **Air-Hardening Capability** | **Excellent** | Excellent | Excellent | Poor | - **Primary Advantage** | Balance + stability | Balance | Stability | Wear resistance | - **Cost** | Moderate | Moderate | Moderate | Moderate-High | --- ### **Surface Treatment Compatibility** LSS™ MGR™ is compatible with various surface treatments: - **Nitriding**: Excellent candidate for gas, plasma, or salt bath nitriding - **Chrome Plating**: Good adhesion with proper surface preparation - **PVD Coatings**: TiN, TiCN coatings suitable - **Surface Engineering**: Various treatments to enhance specific properties --- ### **Economic Considerations** 1. **Material Cost**: Moderate – competitive pricing for specialized applications 2. **Tool Life**: Good service life in appropriate applications 3. **Heat Treatment Cost**: Lower due to air-hardening capability 4. **Scrap Reduction**: Minimal distortion reduces scrap from heat treatment 5. **Machining Cost**: Reasonable machining costs 6. **Overall Value**: Excellent for applications requiring dimensional stability with balanced properties --- ### **Technical Support** Latrobe provides comprehensive technical support for LSS™ MGR™: - **Application Engineering**: Guidance on appropriate applications and heat treatment - **Troubleshooting**: Assistance with tool performance issues - **Heat Treatment Support**: Protocols for optimal performance - **Field Support**: On-site technical assistance available - **Material Selection**: Assistance in choosing the optimal grade for specific needs --- **Select Latrobe LSS™ MGR™ Tool Steel** for applications requiring excellent dimensional stability combined with good toughness and wear resistance. This premium air-hardening tool steel provides reliable performance in precision tools, dies, molds, and fixtures where minimal distortion during heat treatment is critical. LSS™ MGR™ represents an optimal solution for applications that demand the dimensional stability advantages of air-hardening steels with the balanced mechanical properties needed for demanding tooling applications. When predictable heat treatment response, minimal distortion, and versatile performance are required for precision manufacturing applications, LSS™ MGR™ delivers the technical advantages backed by Latrobe's manufacturing excellence and technical support. -:- For detailed product information, please contact sales. -: Latrobe LSS™ MGR™ Tool Steel (ASTM A8) Specification Dimensions Size： Diameter 20-1000 mm Length <7188 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™ MGR™ Tool Steel (ASTM A8) Properties -:- For detailed product information, please contact sales. -:

Spherical Latrobe LSS™ MGR™ Tool Steel Powder (ASTM A8) Particle Size Description -:- For detailed product information, please contact sales. -: Applications of Spherical Latrobe LSS™ MGR™ Tool Steel Powder (ASTM A8) -:- For detailed product information, please contact sales. -: -:- For detailed product information, please contact sales. -: Applications of Latrobe LSS™ MGR™ Tool Steel Spherical Powder (ASTM A8) -:- For detailed product information, please contact sales. -: Chemical Identifiers Latrobe LSS™ MGR™ Tool Steel Spherical Powder (ASTM A8) -:- For detailed product information, please contact sales. -:

Packing of Latrobe LSS™ MGR™ Tool Steel Spherical Powder (ASTM A8) -:- 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 3659 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