Spherical Latrobe Tatmo-VN™ ASTM M7 High Speed Steel Powder

Latrobe Tatmo-VN™ ASTM M7 High Speed Steel Spherical Powder Product Information -:- For detailed product information, please contact sales. -: Latrobe Tatmo-VN™ ASTM M7 High Speed Steel Spherical Powder Synonyms -:- For detailed product information, please contact sales. -: -:- For detailed product information, please contact sales. -: Spherical Latrobe Tatmo-VN™ ASTM M7 High Speed Steel Powder characteristics -:- For detailed product information, please contact sales. -: Spherical Latrobe Tatmo-VN™ ASTM M7 High Speed Steel Powder 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 Tatmo-VN™ ASTM M7 High Speed Steel Powder 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 Tatmo-VN™ ASTM M7 High Speed Steel Powder Chemical Composition -:- For detailed product information, please contact sales. -: -:- For detailed product information, please contact sales. -: Latrobe Tatmo-VN™ ASTM M7 High Speed Steel Product Information -:- For detailed product information, please contact sales. -: # **Latrobe Tatmo-VN™ ASTM M7 High Speed Steel** ## **Advanced Nitrogen-Enhanced M7 HSS for Superior Performance** Latrobe Tatmo-VN™ M7 is a technologically advanced, nitrogen-enhanced variant of the proven M7 high-speed steel, representing a significant evolution in high-vanadium molybdenum HSS performance. Through precise nitrogen alloying in the manufacturing process, this grade delivers enhanced mechanical properties, improved microstructural refinement, and superior cutting performance compared to conventional M7 grades. Engineered for the most demanding machining applications, Tatmo-VN™ provides an optimal balance of wear resistance, toughness, and thermal stability. --- ### **Key Features & Benefits** - **Nitrogen Enhancement**: Proprietary nitrogen alloying refines carbide structure, improves homogeneity, and enhances secondary hardening response - **Superior Wear Resistance**: High vanadium content combined with nitrogen strengthening provides exceptional resistance to abrasive and adhesive wear - **Enhanced Toughness**: Refined microstructure and optimized carbide distribution improve impact resistance for interrupted cutting operations - **Improved Thermal Stability**: Nitrogen contributes to better hot hardness retention at elevated cutting temperatures - **Consistent Performance**: Advanced melting and processing technologies ensure uniform properties throughout the material - **Excellent Grindability**: Balanced composition maintains good grindability despite high wear resistance characteristics --- ### **Chemical Composition (Typical %, ASTM A600 M7 with Nitrogen Enhancement)** | Element | Carbon (C) | Tungsten (W) | Molybdenum (Mo) | Chromium (Cr) | Vanadium (V) | Nitrogen (N) | |---------|------------|--------------|-----------------|---------------|--------------|--------------| | **Content** | 1.00 - 1.10 | 1.60 - 2.20 | 8.50 - 9.50 | 3.75 - 4.50 | 2.00 - 2.50 | 0.04 - 0.08 | *Note: Tatmo-VN™ incorporates controlled nitrogen addition within the specified range. Silicon (Si) 0.20-0.45%, Manganese (Mn) 0.20-0.40%, and trace elements are carefully controlled to optimize performance.* --- ### **Physical & Mechanical Properties** | Property | Value / Description | |----------|---------------------| | **Density** | 8.08 g/cm³ | | **Thermal Conductivity** | 23-26 W/m·K at 20°C | | **Specific Heat Capacity** | 0.45 kJ/kg·K at 20°C | | **Coefficient of Thermal Expansion** | 10.7 × 10⁻⁶/K (20-400°C) | | **Hardness (Annealed)** | 225-245 HB | | **Hardness (Heat Treated)** | **65-67 HRC** (typical optimized working range) | | **Transverse Rupture Strength** | 3,900-4,500 MPa (at 66 HRC) | | **Compressive Strength** | 4,000-4,600 MPa (at 66 HRC) | | **Modulus of Elasticity** | 215-225 GPa | | **Impact Toughness** | Excellent for high-vanadium HSS grades | | **Nitrogen Contribution** | Forms fine carbo-nitrides, enhances matrix strengthening | --- ### **Heat Treatment Guidelines** #### **Annealing** - **Temperature**: 850-870°C (1560-1600°F) - **Method**: Slow furnace cool at ≤20°C (36°F) per hour to 600°C (1110°F), then air cool - **Resultant Hardness**: 225-245 HB - **Special Note**: Nitrogen stabilization may require slightly higher annealing temperatures #### **Stress Relieving** - **Temperature**: 650-680°C (1200-1255°F) - **Hold Time**: 1-2 hours per inch of thickness - **Cooling**: Slow furnace cool to 500°C (930°F), then air cool #### **Hardening** 1. **Preheating**: **Double preheat recommended**
• First: 800-830°C (1470-1525°F) – thorough equalization
• Second: 980-1010°C (1795-1850°F) – complete austenite conditioning 2. **Austenitizing**: **1195-1215°C (2185-2220°F)** – precise temperature control critical 3. **Soak Time**: 2-4 minutes per inch of cross-section 4. **Quenching**: Oil quenching preferred; salt or air for specific applications 5. **Immediate Handling**: Cool to 50-65°C (120-150°F) before tempering #### **Tempering (Enhanced by Nitrogen)** - **Temperature Range**: 540-580°C (1005-1075°F) - **Cycles**: **Double or triple temper required** – nitrogen enhances secondary hardening response - **Duration**: Minimum 2 hours per cycle, air cool between cycles - **Target Hardness**: 65-67 HRC typically achieved at 540-560°C (1005-1040°F) - **Nitrogen Effect**: Contributes to more complete secondary hardening and tempering resistance #### **Sub-Zero Treatment (Optional)** - **Application**: Recommended for maximum dimensional stability - **Temperature**: -80 to -100°C (-112 to -148°F) - **Timing**: After quenching, before first temper - **Duration**: 2-3 hours --- ### **International Standards & Equivalent Grades** | Standard | Grade Designation | Notes | |----------|-------------------|-------| | **ASTM** | A600 M7 (Modified) | Primary reference specification | | **ISO** | HS1-9-2 (Enhanced) | Based on ISO 4957 with modifications | | **DIN** | 1.3348 / S 1-9-2 (N) | German standard with nitrogen enhancement | | **JIS** | SKH58 (Enhanced) | Japanese equivalent with modifications | | **AFNOR** | HS1-9-2 (Z85WDCV 09-02-02) | French standard reference | | **GB** | W2Mo9Cr4V2 (Enhanced) | Chinese equivalent with nitrogen | | **Proprietary** | Tatmo-VN™ | Latrobe Special Steel proprietary grade | --- ### **Typical Applications** #### **High-Performance Cutting Tools** - **Premium End Mills**: For machining stainless steels, high-temperature alloys, and abrasive composites requiring both wear resistance and toughness - **Drills & Reamers**: High-performance twist drills, core drills, and precision reamers for difficult materials - **Threading Tools**: Taps, thread mills, and thread whirling tools for production threading operations - **Gear Manufacturing**: Hobs, shaper cutters, and finishing tools for gear production - **Form Tools & Cutters**: Complex shaped tools requiring balanced wear and toughness properties - **Milling Cutters**: Face mills, shoulder mills, and slotting cutters for varied machining conditions #### **Specialized Industrial Applications** - **Cold Work Tooling**: Punches, dies, and forming tools requiring excellent wear resistance with good impact strength - **Woodworking & Composite Tools**: Router bits, trimming tools, and shaper cutters for abrasive composites - **Knives & Industrial Blades**: Cutting blades for mixed material applications and production cutting - **Wear Components**: Guide pins, bushings, and wear plates in demanding industrial environments #### **Industry-Specific Uses** - **Aerospace Manufacturing**: Tools for titanium alloys, Inconel, and composite materials requiring balanced performance - **Automotive Production**: High-volume machining of cast iron, alloy steels, and transmission components - **Energy Sector**: Tools for machining valve components, turbine parts, and oilfield equipment - **Medical Device Manufacturing**: Cutting tools for cobalt-chrome alloys and titanium implants - **General Precision Machining**: Versatile tools for job shops and contract manufacturing --- ### **Machining & Fabrication Notes** #### **Machinability (Annealed Condition)** - **Rating**: 35-45% of B1112 free-machining steel - **Recommended Tools**: Carbide tools preferred; premium coated HSS for secondary operations - **Cutting Speeds**: 8-12 m/min (25-40 SFM) for turning operations - **Feed Rates**: Moderate feeds with good chip control - **Coolant**: Heavy-duty soluble oil or synthetic coolant essential - **Nitrogen Effect**: Slightly improved machinability over conventional M7 due to refined microstructure #### **Grindability** - **Relative Rating**: 45-55 (vs. 100 for annealed O1 tool steel) - **Abrasive Recommendations**: Aluminum oxide or ceramic alumina wheels - **Wheel Maintenance**: Regular dressing required for optimal results - **Coolant**: Ample coolant flow to prevent thermal damage - **Advantage**: Better grindability than M3/M4 grades with comparable wear resistance #### **EDM Machining** - Suitable for wire EDM and sinker EDM operations - Stress relieve after rough machining operations - Final heat treatment recommended after EDM completion - Nitrogen enhancement may affect recast layer characteristics --- ### **Quality Assurance & Metallurgical Standards** #### **Microstructural Requirements** - **Carbide Distribution**: Extremely uniform, fine dispersion of MC and M₂C type carbides - **Carbide Refinement**: Nitrogen contributes to finer carbide size and distribution - **Grain Size**: ASTM 9 or finer - **Decarburization**: ≤0.08 mm per side on finished products - **Non-Metallic Inclusions**: ASTM E45 Method A, ≤1.5 total rating - **Nitrogen Analysis**: Precisely controlled within specified range #### **Testing & Certification** - Full traceability from melt to final product - Complete chemical analysis including nitrogen content verification - Hardness testing throughout manufacturing process - Microstructural evaluation with emphasis on carbide distribution and refinement - Mechanical property testing available for specific applications - Certified material test reports with detailed nitrogen specification --- ### **Available Product Forms** | Form | Standard Sizes | Condition | Surface Finish | |------|---------------|-----------|---------------| | **Round Bars** | 5mm - 250mm diameter | Annealed | Centerless Ground, Polished | | **Flat Bars** | 6-150mm thickness, 20-250mm width | Annealed | Ground, Mill finish | | **Squares** | 6-100mm | Annealed | Ground, As-rolled | | **Forged Blanks** | Custom dimensions | Annealed | As-forged, Rough machined | | **Billets** | 100-300mm diameter | Annealed | Rough turned | | **Wire** | 1-12mm diameter | Annealed, Hardened & Tempered | Bright, Polished | --- ### **Technical Comparison** | Property | Tatmo-VN™ M7 | Standard M7 | M3-1 | M35 (5% Co) | |----------|---------------|-------------|------|-------------| | **Wear Resistance** | **Very High** | High | Very High | High | | **Toughness** | **Excellent** | Very Good | Good | Good | | **Hot Hardness** | Excellent | Excellent | Excellent | **Superior** | | **Grindability** | Good | Good | Moderate | Very Good | | **Microstructure** | **Refined** | Standard | Fine | Standard | | **Peak Hardness (HRC)** | 65-67 | 64-66 | 65-67 | 65-67 | | **Primary Advantage** | Balanced + refined | Balanced | Wear focused | Hot hardness | --- ### **Coating Compatibility** Tatmo-VN™ M7 provides an excellent substrate for advanced tool coatings: - **PVD Coatings**: TiN, TiCN, TiAlN, AlCrN - **CVD Coatings**: TiC, TiCN, TiN - **Special Advantage**: Refined microstructure and nitrogen enhancement improve coating adhesion and performance - **Pre-treatment**: Standard polishing and cleaning procedures apply --- ### **Storage & Handling** 1. **Storage Conditions**: Dry, temperature-controlled environment recommended 2. **Corrosion Protection**: Apply rust preventive oil for long-term storage 3. **Handling**: Use clean gloves and proper handling equipment 4. **Identification**: Clearly marked with grade, heat number, and nitrogen specification 5. **Quality Preservation**: Protect finished surfaces from damage during handling --- ### **Technical Support Services** Latrobe provides comprehensive support for Tatmo-VN™ M7 applications: - **Application Engineering**: Technical assistance for tool design and grade selection - **Heat Treatment Guidance**: Custom protocols for specific applications - **Performance Optimization**: Recommendations for machining parameters and tool geometry - **Troubleshooting Support**: Analysis of tool performance and failure investigation - **Technical Training**: Educational programs on advanced HSS technology --- **Select Latrobe Tatmo-VN™ ASTM M7 High Speed Steel** for applications requiring the optimal balance of wear resistance, toughness, and thermal stability. This nitrogen-enhanced grade represents a significant advancement over conventional M7, offering refined microstructure, improved mechanical properties, and more consistent performance in demanding machining applications. Tatmo-VN™ M7 is the intelligent choice when both wear resistance and impact strength are critical, providing superior tool life and reliability in challenging machining environments. The nitrogen enhancement technology ensures this grade delivers premium performance while maintaining excellent manufacturability and grinding characteristics. -:- For detailed product information, please contact sales. -: Latrobe Tatmo-VN™ ASTM M7 High Speed Steel Specification Dimensions Size： Diameter 20-1000 mm Length <7153 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 Tatmo-VN™ ASTM M7 High Speed Steel Properties -:- For detailed product information, please contact sales. -:

Spherical Latrobe Tatmo-VN™ ASTM M7 High Speed Steel Powder Particle Size Description -:- For detailed product information, please contact sales. -: Applications of Spherical Latrobe Tatmo-VN™ ASTM M7 High Speed Steel Powder -:- For detailed product information, please contact sales. -: -:- For detailed product information, please contact sales. -: Applications of Latrobe Tatmo-VN™ ASTM M7 High Speed Steel Spherical Powder -:- For detailed product information, please contact sales. -: Chemical Identifiers Latrobe Tatmo-VN™ ASTM M7 High Speed Steel Spherical Powder -:- For detailed product information, please contact sales. -:

Packing of Latrobe Tatmo-VN™ ASTM M7 High Speed Steel Spherical Powder -:- 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 3624 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