Latrobe Tatmo™ ASTM M1 High Speed Steel

Latrobe Tatmo™ ASTM M1 High Speed Steel Product Information -:- For detailed product information, please contact sales. -: Latrobe Tatmo™ ASTM M1 High Speed Steel Synonyms -:- For detailed product information, please contact sales. -:

Latrobe Tatmo™ ASTM M1 High Speed Steel Product Information -:- For detailed product information, please contact sales. -: # Product Datasheet: Latrobe Tatmo™ ASTM M1 High Speed Steel ## 1. Product Overview **Latrobe Tatmo™ ASTM M1** is a premium-grade tungsten-molybdenum high speed steel (HSS) manufactured through advanced metallurgical processes to deliver exceptional cutting performance and thermal stability. As part of the M-series high speed steels, M1 represents a balanced composition that combines the best attributes of tungsten and molybdenum alloying systems. Tatmo™ M1 is engineered for applications requiring superior hot hardness, wear resistance, and toughness under demanding cutting conditions, making it a versatile choice for both general-purpose and specialized cutting tools. ## 2. Key Advantages & Characteristics - **Excellent Hot Hardness**: Maintains cutting edge hardness at elevated temperatures up to 540°C (1000°F) - **Superior Wear Resistance**: Vanadium and chromium carbides provide exceptional abrasion resistance - **Good Toughness**: Balanced composition offers better impact resistance than higher-alloy HSS grades - **Versatile Performance**: Suitable for a wide range of cutting applications and workpiece materials - **Good Grindability**: Favorable balance between wear resistance and ease of tool grinding - **Cost-Effective Performance**: Provides excellent value between conventional HSS and premium grades - **Consistent Quality**: Latrobe's advanced manufacturing ensures uniform properties and microstructure ## 3. Chemical Composition (ASTM A600 Specification) ### 3.1 Standard Composition (wt.%) | Element | ASTM M1 Range | Typical Tatmo™ M1 Value | Metallurgical Function | |---------|---------------|-------------------------|------------------------| | Carbon (C) | 0.78-0.88 | 0.83 | Primary carbide former, hardness | | Tungsten (W) | 1.40-2.10 | 1.75 | Hot hardness, wear resistance | | Molybdenum (Mo) | 8.00-9.50 | 8.75 | Hot hardness, hardenability | | Chromium (Cr) | 3.50-4.00 | 3.75 | Hardenability, wear resistance | | Vanadium (V) | 1.00-1.40 | 1.20 | Wear resistance, grain refinement | | Cobalt (Co) | ≤1.00 | 0.50 | Optional, enhances hot hardness | | Manganese (Mn) | ≤0.40 | 0.25 | Deoxidizer, hardenability | | Silicon (Si) | ≤0.40 | 0.25 | Deoxidizer, strength | | Sulfur (S) | ≤0.030 | 0.010 | Machinability enhancement | | Phosphorus (P) | ≤0.030 | 0.015 | Impurity control | ### 3.2 Latrobe Tatmo™ Enhancements - **Improved Carbide Distribution**: Uniform dispersion of primary carbides - **Enhanced Cleanliness**: Lower non-metallic inclusion content - **Optimized Grain Structure**: Controlled austenite grain size for balance of hardness and toughness - **Consistent Chemistry**: Tight control within specification ranges ## 4. Manufacturing Process ### 4.1 Production Methodology ``` 1. MELTING PROCESS • Electric Arc Furnace primary melting • Secondary refining for composition control • Optional: Special melting for premium grades 2. FORMING PROCESSES • Hot rolling to desired dimensions • Controlled cooling to optimize microstructure • Annealing for machinability 3. QUALITY CONTROL • Full chemical analysis verification • Microstructural evaluation • Hardness testing in annealed condition • Ultrasonic testing for premium grades ``` ### 4.2 Quality Assurance Parameters | Parameter | Specification | Test Method | |-----------|---------------|-------------| | Hardness (Annealed) | 207-255 HB | ASTM E10 | | Decarburization | Per customer requirements | Microscopic | | Grain Size | ASTM 8-10 | ASTM E112 | | Carbide Distribution | Uniform | Microscopic evaluation | | Surface Quality | Free of seams and cracks | Visual and NDT | ## 5. Physical & Mechanical Properties ### 5.1 Annealed Condition (Delivery State) | Property | Value Range | Test Standard | |----------|-------------|---------------| | Hardness | 207-255 HB | ASTM E10 | | Tensile Strength | 690-860 MPa | ASTM E8 | | Yield Strength (0.2%) | 480-620 MPa | ASTM E8 | | Elongation | 15-20% | ASTM E8 | | Reduction of Area | 30-45% | ASTM E8 | | Modulus of Elasticity | 215 GPa | Calculated | ### 5.2 Heat Treated Condition (Hardened) | Property | Value Range | Heat Treatment | |----------|-------------|----------------| | Hardness | 63-66 HRC | Properly hardened | | Hot Hardness (540°C) | 55-58 HRC | Secondary hardening effect | | Transverse Rupture Strength | 3500-4100 MPa | After proper heat treatment | | Compressive Strength | 3000-3600 MPa | At room temperature | | Impact Toughness | 15-25 J | Charpy unnotched | ### 5.3 Thermal Properties | Property | Value | Conditions | |----------|-------|-----------| | Thermal Conductivity | 25.0 W/m·K | 20°C | | Specific Heat | 460 J/kg·K | 20°C | | Thermal Expansion | 11.5×10⁻⁶/°C | 20-100°C | | Ac₁ Temperature | 800-830°C | Lower critical | | Ac₃ Temperature | 870-900°C | Upper critical | | Tempering Temperature Range | 540-600°C | For secondary hardening | ## 6. Heat Treatment Guidelines ### 6.1 Standard Heat Treatment Cycle ``` 1. PREHEATING • First stage: 650-700°C (1200-1290°F) • Second stage: 800-850°C (1470-1560°F) • Soak time: 20-30 minutes per stage 2. AUSTENITIZING • Temperature: 1190-1220°C (2175-2230°F) • Time: 2-4 minutes per mm of thickness • Atmosphere: Salt bath or protective atmosphere 3. QUENCHING • Medium: Oil, salt bath (500-550°C), or air • Temperature: 20-60°C (oil), 500-550°C (salt) • Method: Agitated oil or still air for sections <20mm 4. TEMPERING • Temperature: 540-600°C (1000-1110°F) • Time: 60-120 minutes per cycle • Cycles: 2-3 tempering cycles recommended • Cooling: Air cool after each temper ``` ### 6.2 Special Heat Treatment Considerations - **Multiple Tempers**: Essential for complete secondary hardening - **Sub-zero Treatment**: Optional for maximum hardness and dimensional stability - **Surface Treatments**: Nitriding, PVD/CVD coatings can be applied - **Stress Relieving**: Recommended after rough grinding ## 7. International Standards & Specifications ### 7.1 Primary Specifications | Standard | Designation | Equivalent Grades | |----------|-------------|-------------------| | ASTM A600 | M1 | Primary specification | | UNS | T11301 | Unified Numbering System | | ISO 4957 | HS6-5-2 | International equivalent | | JIS G4403 | SKH51 | Japanese standard | | DIN 17350 | 1.3343 | German material number | | GB/T 9943 | W6Mo5Cr4V2 | Chinese standard | ### 7.2 Industry Specifications | Industry | Standard | Application | |----------|----------|------------| | Cutting Tools | ANSI B94.50 | Cutting tool materials | | Aerospace | AMS 6490 | Tool steel for aerospace | | Automotive | SAE J437 | Tool steel composition | | General | ISO 10825 | Gear materials | ## 8. Product Applications ### 8.1 Cutting Tools (Primary Application) - **Drills**: Twist drills, core drills, step drills - **Taps**: Hand and machine taps, form taps - **End Mills**: General purpose end mills, slot drills - **Reamers**: Chucking reamers, shell reamers - **Broaches**: Surface broaches, internal broaches - **Saw Blades**: Hacksaw blades, band saw blades - **Turning Tools**: Single point tools, form tools ### 8.2 Forming Tools - **Punches**: Blanking punches, perforating punches - **Dies**: Blanking dies, forming dies - **Molds**: Plastic injection molds, die casting molds - **Shear Blades**: Guillotine blades, slitter knives ### 8.3 Industrial Components - **Machine Parts**: Wear plates, guides, bearings - **Valve Components**: High-wear valve parts - **Textile Components**: Guides, needles, parts - **Woodworking Tools**: Knives, cutter heads ## 9. Machining & Grinding Characteristics ### 9.1 Machinability (Annealed Condition) | Operation | Recommended Parameters | Tool Material | |-----------|------------------------|---------------| | Turning | Speed: 30-50 m/min | Carbide or ceramic | | Feed | 0.15-0.30 mm/rev | Positive rake angles | | Milling | Speed: 25-40 m/min | Carbide end mills | | Feed/tooth | 0.08-0.15 mm | Reduced for tool life | | Drilling | Speed: 15-25 m/min | HSS or carbide | | Tapping | Speed: 5-10 m/min | HSS-E with coatings | ### 9.2 Grinding Recommendations - **Wheel Selection**: Al₂O₃ or CBN for hardened material - **Grit Size**: 60-120 for roughing, 120-220 for finishing - **Coolant**: Essential to prevent grinding burns - **Dressing**: Frequent for consistent results ## 10. Performance Comparison ### 10.1 Compared to Other HSS Grades | Property | M1 | M2 | M35 | M42 | |----------|----|----|-----|-----| | Room Temp Hardness | 63-66 HRC | 64-66 HRC | 65-67 HRC | 67-69 HRC | | Hot Hardness (540°C) | 55-58 HRC | 56-59 HRC | 58-61 HRC | 60-63 HRC | | Wear Resistance | Good | Very Good | Excellent | Superior | | Toughness | Very Good | Good | Fair | Fair to Good | | Cost Effectiveness | Excellent | Very Good | Good | Fair | ### 10.2 Application Performance - **Cutting Speed**: 20-40% higher than conventional tool steels - **Tool Life**: 3-5× longer than carbon tool steels - **Temperature Resistance**: Effective up to 540°C (1000°F) - **Versatility**: Suitable for ferrous and non-ferrous materials ## 11. Quality Assurance ### 11.1 Testing Requirements | Test | Standard | Frequency | Acceptance Criteria | |------|----------|-----------|-------------------| | Chemical Analysis | ASTM E415 | Each heat | Within specification | | Hardness Test | ASTM E10 | Each lot | 207-255 HB | | Microstructure | Customer spec | Each lot | Uniform carbide distribution | | Decarburization | Per spec | Each lot | Within allowed limits | ### 11.2 Certifications & Documentation - **Mill Test Certificates**: Chemical and physical properties - **Traceability**: Heat number traceability - **Process Records**: Manufacturing process documentation - **Industry Certifications**: ISO 9001, AS9100 as applicable ## 12. Technical Support ### 12.1 Application Engineering - **Tool Design Assistance**: Optimal geometry recommendations - **Heat Treatment Guidance**: Custom cycles for specific applications - **Failure Analysis**: Technical support for tool failures - **Performance Optimization**: Application-specific recommendations ### 12.2 Design Guidelines - **Edge Preparation**: Critical for tool performance - **Heat Treatment**: Follow recommended cycles precisely - **Surface Treatments**: Consider coatings for enhanced performance - **Tool Geometry**: Optimize for specific applications --- ## Technical Notice The information contained in this datasheet represents typical values for Latrobe Tatmo™ M1 high speed steel. Actual performance may vary based on specific processing, heat treatment, and application conditions. Consultation with Latrobe technical personnel is recommended for critical applications. **Document Control**: - Document: LAT-TATMO-M1-DS-001 - Revision: 2.0 - Effective Date: [Current Date] **Contact Information**: Latrobe Specialty Metals Technical Services [Address] [Phone] [Email] [Website] --- *Tatmo™ is a trademark of Latrobe Specialty Metals. This information is proprietary and confidential. Specifications subject to change without notice.* -:- For detailed product information, please contact sales. -: Latrobe Tatmo™ ASTM M1 High Speed Steel Specification Dimensions Size： Diameter 20-1000 mm Length <5330 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™ ASTM M1 High Speed Steel Properties -:- For detailed product information, please contact sales. -:

Applications of Latrobe Tatmo™ ASTM M1 High Speed Steel -:- For detailed product information, please contact sales. -: Chemical Identifiers Latrobe Tatmo™ ASTM M1 High Speed Steel -:- For detailed product information, please contact sales. -:

Packing of Latrobe Tatmo™ ASTM M1 High Speed Steel -:- 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 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 1801 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