Spherical Latrobe Dynamax™ ASTM M42, DIN 1.3247 Super High Speed Steel Powder

Latrobe Dynamax™ ASTM M42, DIN 1.3247 Super High Speed Steel Spherical Powder Product Information -:- For detailed product information, please contact sales. -: Latrobe Dynamax™ ASTM M42, DIN 1.3247 Super High Speed Steel Spherical Powder Synonyms -:- For detailed product information, please contact sales. -: -:- For detailed product information, please contact sales. -: Spherical Latrobe Dynamax™ ASTM M42, DIN 1.3247 Super High Speed Steel Powder characteristics -:- For detailed product information, please contact sales. -: Spherical Latrobe Dynamax™ ASTM M42, DIN 1.3247 Super 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 Dynamax™ ASTM M42, DIN 1.3247 Super 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 Dynamax™ ASTM M42, DIN 1.3247 Super High Speed Steel Powder Chemical Composition -:- For detailed product information, please contact sales. -: -:- For detailed product information, please contact sales. -: Latrobe Dynamax™ ASTM M42, DIN 1.3247 Super High Speed Steel Product Information -:- For detailed product information, please contact sales. -: # **Latrobe Dynamax™ ASTM M42 High Speed Steel** ## **Ultra-High Cobalt Super HSS for Extreme Performance and Maximum Hot Hardness** Latrobe Dynamax™ M42 is an elite, ultra-high cobalt super high-speed steel (ASTM A600 M42 / DIN 1.3247) engineered to deliver maximum hot hardness and cutting performance in the most demanding machining applications. With an exceptional 8% cobalt content, this premium grade represents the pinnacle of conventional high-speed steel technology, offering superior red hardness that enables productive machining of exotic materials at elevated cutting parameters. Dynamax™ is the material of choice when absolute maximum performance in high-temperature cutting conditions is required. --- ### **Key Features & Benefits** - **Maximum Hot Hardness**: 8% cobalt content provides the highest red hardness among standard HSS grades, maintaining cutting edge integrity at temperatures exceeding 600°C (1110°F) - **Exceptional Wear Resistance**: High carbon and vanadium content combined with cobalt strengthening delivers outstanding abrasion resistance - **Superior Edge Retention**: Maintains sharp cutting edges under extreme thermal and mechanical loads - **Enhanced Productivity**: Enables significantly higher cutting speeds and feeds than conventional HSS grades - **Optimal for Difficult Materials**: Exceptionally effective on high-temperature alloys, hardened steels, and abrasive composites - **Premium Coating Substrate**: High base hardness and thermal stability provide an excellent foundation for advanced PVD and CVD coatings --- ### **Chemical Composition (Typical %, ASTM A600 M42 / DIN 1.3247)** | Element | Carbon (C) | Tungsten (W) | Molybdenum (Mo) | Chromium (Cr) | Vanadium (V) | Cobalt (Co) | |---------|------------|--------------|-----------------|---------------|--------------|-------------| | **Content** | 1.05 - 1.15 | 1.15 - 1.85 | 9.00 - 10.00 | 3.50 - 4.25 | 0.95 - 1.35 | 7.75 - 8.75 | *Note: Dynamax™ features a balanced high-cobalt, high-molybdenum composition optimized for maximum hot hardness. Silicon (Si) 0.15-0.65% and Manganese (Mn) 0.15-0.40% are precisely controlled. The composition represents the optimal balance for extreme high-temperature performance while maintaining reasonable toughness.* --- ### **Physical & Mechanical Properties** | Property | Value / Description | |----------|---------------------| | **Density** | 8.20 g/cm³ | | **Thermal Conductivity** | 26-30 W/m·K at 20°C (improved over lower-cobalt grades) | | **Specific Heat Capacity** | 0.45 kJ/kg·K at 20°C | | **Coefficient of Thermal Expansion** | 10.5 × 10⁻⁶/K (20-400°C) | | **Hardness (Annealed)** | 235-255 HB | | **Hardness (Heat Treated)** | **67-69 HRC** (typical achievable working range) | | **Hot Hardness Retention** | Maintains ~62 HRC at 600°C (1110°F) – best among standard HSS | | **Transverse Rupture Strength** | 3,200-3,800 MPa (at 68 HRC) | | **Compressive Strength** | 3,600-4,200 MPa (at 68 HRC) | | **Modulus of Elasticity** | 225-235 GPa | | **Impact Toughness** | Moderate – optimized for maximum hot hardness over shock resistance | --- ### **Heat Treatment Guidelines** #### **Annealing** - **Temperature**: 850-870°C (1560-1600°F) - **Method**: Slow furnace cool at ≤18°C (32°F) per hour to 600°C (1110°F), then air cool - **Resultant Hardness**: 235-255 HB - **Special Note**: High cobalt content requires careful temperature control #### **Stress Relieving** - **Temperature**: 650-680°C (1200-1255°F) - **Hold Time**: 1.5-2.5 hours per inch of thickness - **Cooling**: Slow furnace cool to 500°C (930°F), then air cool #### **Hardening (Requires Precise Control)** 1. **Preheating**: **Critical for high-cobalt grades**
• First: 750-800°C (1380-1470°F) – thorough equalization
• Second: 980-1010°C (1795-1850°F) – complete austenite conditioning 2. **Austenitizing**: **1175-1195°C (2145-2185°F)** – precise temperature control essential (±3°C) 3. **Soak Time**: 2-4 minutes per inch of cross-section 4. **Quenching**: Oil quenching preferred; high-speed air for thin sections 5. **Immediate Handling**: Cool to 50-65°C (120-150°F) before tempering #### **Tempering (Critical for Optimal Performance)** - **Temperature Range**: 540-570°C (1005-1060°F) - **Cycles**: **Triple tempering mandatory** – quadruple tempering recommended for complex tools - **Duration**: Minimum 2 hours per cycle, air cool to room temperature between cycles - **Target Hardness**: 67-69 HRC typically achieved at 540-550°C (1005-1020°F) - **Cobalt Effect**: Significant enhancement of secondary hardening response #### **Sub-Zero Treatment (Highly Recommended)** - **Application**: Essential for maximum dimensional stability and hardness - **Temperature**: -100 to -120°C (-148 to -184°F) - **Timing**: After quenching, before first temper - **Duration**: 3-4 hours minimum - **Benefit**: Critical for achieving maximum hardness and stability in high-cobalt grades --- ### **International Standards & Equivalent Grades** | Standard | Grade Designation | Notes | |----------|-------------------|-------| | **ASTM** | A600 M42 | Primary specification (UNS T11342) | | **DIN** | 1.3247 / S 2-10-1-8 | German standard with cobalt specification | | **ISO** | HS2-9-1-8 | ISO 4957 designation | | **JIS** | SKH59 / M42 | Japanese industrial standard | | **AFNOR** | HS2-9-1-8 (Z85WDKCV 09-02-01-08) | French association standard | | **GB** | W2Mo9Cr4VCo8 | Chinese equivalent | | **UNS** | T11342 | Unified Numbering System | | **Proprietary** | Dynamax™ | Latrobe Special Steel premium designation | --- ### **Typical Applications** #### **Ultra-High-Performance Cutting Tools** - **Premium End Mills**: For high-speed milling of hardened steels (45-62 HRC), high-temperature alloys (Inconel, Hastelloy), and titanium alloys - **Drills & Reamers**: High-performance twist drills, core drills, and precision reamers for exotic materials - **Threading Tools**: Premium taps, thread mills, and thread whirling tools for production machining of difficult materials - **Gear Manufacturing**: High-performance hobs, shaper cutters, and finishing tools for hardened gear materials - **Boring Tools**: Precision boring bars and inserts for high-temperature applications - **Form Tools & Inserts**: Complex shaped tools requiring maximum hot hardness and wear resistance #### **Specialized Industrial Applications** - **Aerospace Tooling**: Tools for machining nickel-based superalloys, titanium, and high-temperature composites - **Energy Sector Tools**: For machining turbine components, valve parts, and oilfield equipment in hardened conditions - **Die & Mold Components**: Core pins, ejector pins, and inserts for high-temperature plastic molding - **Medical Device Tools**: Cutting tools for cobalt-chrome alloys and titanium implants requiring precision and longevity #### **Industry Leadership Applications** - **High-Speed Machining (HSM)**: Tools operating at maximum machine capabilities in demanding materials - **Hard Machining**: Cutting hardened steels without intermediate annealing or grinding operations - **Dry Machining**: Applications where coolant cannot be used, requiring exceptional hot hardness - **Minimum Quantity Lubrication (MQL)**: Operations with limited cooling, relying on material thermal resistance --- ### **Machining & Fabrication Notes** #### **Machinability (Annealed Condition)** - **Rating**: 30-40% of B1112 free-machining steel – **difficult to machine** - **Recommended Tools**: **Carbide tools exclusively** – premium grades with wear-resistant coatings - **Cutting Speeds**: 5-10 m/min (15-30 SFM) for turning operations - **Feed Rates**: Light to moderate feeds with sharp, positive rake geometries - **Coolant**: **Essential** – use heavy-duty soluble oil or high-performance synthetic coolant - **Special Note**: High cobalt content increases work hardening tendency #### **Grindability** - **Relative Rating**: 40-50 (vs. 100 for annealed O1 tool steel) – **difficult to grind** - **Abrasive Recommendations**: **CBN (cubic boron nitride) wheels strongly recommended** - **Alternative Abrasives**: Premium ceramic alumina if CBN unavailable - **Wheel Maintenance**: Frequent dressing required – soft-grade, open-structure wheels - **Coolant**: **Flood coolant mandatory** to prevent thermal damage and micro-cracking - **Grinding Parameters**: Light infeeds (0.005-0.020 mm/pass), high wheel speeds #### **EDM Machining** - Suitable but generates a hard, brittle recast layer (white layer) - **Stress relieving after rough EDM is absolutely mandatory** - Final heat treatment should follow finish EDM operations - Additional grinding or polishing required to remove affected surface layer - High cobalt content may affect electrical conductivity parameters --- ### **Quality Assurance & Metallurgical Standards** #### **Microstructural Requirements** - **Carbide Distribution**: Uniform, fine dispersion of MC and M₆C type carbides - **Cobalt Distribution**: Even distribution throughout the steel matrix – critical for performance - **Maximum Carbide Size**: ≤8 microns for premium quality - **Grain Size**: ASTM 10 or finer - **Decarburization**: ≤0.05 mm per side on finished products - **Non-Metallic Inclusions**: ASTM E45, Method D, ≤1.0 total rating #### **Testing & Certification** - Full traceability from electrode to finished product - Complete chemical analysis with special emphasis on cobalt verification - Hardness testing at multiple production stages - **Hot hardness testing** – standard evaluation at elevated temperatures - Comprehensive carbide analysis including size, distribution, and type characterization - Microcleanliness rating per ASTM E45 and SEP 1571 - Certified material test reports including hot hardness data and microstructural analysis --- ### **Available Product Forms** | Form | Standard Sizes | Condition | Surface Finish | |------|---------------|-----------|----------------| | **Round Bars** | 5mm - 200mm diameter | Annealed | Centerless Ground, Super Polish | | **Precision Ground Flat Stock** | 6-50mm thickness | Annealed | Ground & Polished (±0.025mm) | | **Forged Blanks** | Custom dimensions | Annealed | As-forged, Precision machined | | **Billets** | 100-250mm diameter | Annealed | Rough turned, UT inspected | | **Pre-hardened Stock** | Limited sizes | Hardened & Tempered | Ground | For prototype and repair | | **Near-Net Shapes** | Per customer drawing | Annealed | As-forged | Reduced machining waste | --- ### **Technical Comparison** | Property | Dynamax™ M42 | M35 (5% Co) | T15 | Carbide Grades | |----------|---------------|-------------|-----|---------------| | **Hot Hardness** | **Best in HSS** | Excellent | Excellent | Superior | | **Wear Resistance** | Excellent | Very Good | Excellent | **Superior** | | **Toughness** | Moderate | Good | Low | **Very Low** | | **Peak Hardness (HRC)** | 67-69 | 65-67 | 66-68 | 88-93 (HRA) | | **Max Operating Speed** | High | Medium-High | High | **Very High** | | **Shock Resistance** | Fair | Good | Poor | **Very Poor** | | **Primary Advantage** | Max hot hardness in HSS | Balanced | Max wear | Max speed/hardness | --- ### **Coating Compatibility** Dynamax™ M42 provides an exceptional substrate for advanced tool coatings: - **PVD Coatings**: TiN, TiCN, TiAlN, AlCrN, AlTiN – excellent adhesion and performance - **CVD Coatings**: TiC, TiCN, TiN, Al₂O₃ – good compatibility with proper pretreatment - **Special Advantage**: High base hardness (67-69 HRC) and exceptional thermal stability enhance all coating performance - **Pre-treatment**: Premium polishing and specialized cleaning procedures recommended - **Post-coating**: Low-temperature tempering may be beneficial after coating processes --- ### **Economic Considerations** 1. **Premium Material Cost**: Typically 60-80% more expensive than standard M2 2. **Exceptional Tool Life**: Often provides 100-300% longer tool life in appropriate applications 3. **Maximum Productivity**: Enables highest possible cutting parameters for HSS tools 4. **Reduced Machine Downtime**: Extended tool life minimizes tool change frequency 5. **Superior Finish Quality**: Maintains better surface finishes over longer production runs 6. **Overall Value**: Excellent return on investment for demanding applications where performance is critical --- ### **Storage & Handling Protocol** 1. **Storage Environment**: Climate-controlled with humidity <45% RH 2. **Corrosion Protection**: Premium rust preventive oil; VCI packaging for long-term storage 3. **Material Handling**: Use clean cotton gloves; avoid direct skin contact 4. **Identification**: Clearly marked with grade, heat number, and premium certification 5. **Inventory Management**: FIFO system with regular inspection for premium materials 6. **Safety**: Standard machine shop safety protocols; dust collection for grinding operations --- ### **Technical Support & Value-Added Services** Latrobe provides comprehensive premium support for Dynamax™ M42: - **Application Engineering**: Dedicated technical support for tool design and optimization - **Heat Treatment Development**: Custom protocols validated in controlled laboratory conditions - **Performance Testing**: Complete tool life and cutting parameter testing services - **Failure Analysis Laboratory**: Premium metallurgical investigation of tool performance - **Machining Workshops**: Specialized training for high-performance tool fabrication - **Coating Integration**: Partnerships with leading coating technology providers - **Field Support**: On-site technical assistance for critical applications --- **Select Latrobe Dynamax™ ASTM M42 High Speed Steel** for applications requiring the absolute maximum in hot hardness and high-temperature performance from conventional high-speed steel. This 8% cobalt super HSS represents the pinnacle of HSS technology, delivering performance that approaches carbide tools while maintaining the toughness and manufacturability advantages of high-speed steel. Dynamax™ M42 is the strategic choice when machining the most difficult materials, operating at maximum cutting parameters, or when extended tool life directly impacts production efficiency and profitability. For mission-critical applications where performance cannot be compromised, Dynamax™ provides the ultimate HSS solution. -:- For detailed product information, please contact sales. -: Latrobe Dynamax™ ASTM M42, DIN 1.3247 Super High Speed Steel Specification Dimensions Size： Diameter 20-1000 mm Length <7156 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 Dynamax™ ASTM M42, DIN 1.3247 Super High Speed Steel Properties -:- For detailed product information, please contact sales. -:

Spherical Latrobe Dynamax™ ASTM M42, DIN 1.3247 Super High Speed Steel Powder Particle Size Description -:- For detailed product information, please contact sales. -: Applications of Spherical Latrobe Dynamax™ ASTM M42, DIN 1.3247 Super High Speed Steel Powder -:- For detailed product information, please contact sales. -: -:- For detailed product information, please contact sales. -: Applications of Latrobe Dynamax™ ASTM M42, DIN 1.3247 Super High Speed Steel Spherical Powder -:- For detailed product information, please contact sales. -: Chemical Identifiers Latrobe Dynamax™ ASTM M42, DIN 1.3247 Super High Speed Steel Spherical Powder -:- For detailed product information, please contact sales. -:

Packing of Latrobe Dynamax™ ASTM M42, DIN 1.3247 Super 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 3627 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