AISI Type M30 Molybdenum High Speed Tool Steel (UNS T11330)

AISI Type M30 Molybdenum High Speed Tool Steel (UNS T11330) Product Information -:- For detailed product information, please contact sales. -: AISI Type M30 Molybdenum High Speed Tool Steel (UNS T11330) Synonyms -:- For detailed product information, please contact sales. -:

AISI Type M30 Molybdenum High Speed Tool Steel (UNS T11330) Product Information -:- For detailed product information, please contact sales. -: # **Product Introduction: AISI Type M30 High-Cobalt Molybdenum High-Speed Tool Steel (UNS T11330)** ## **Overview** AISI Type M30 is a **cobalt-enhanced molybdenum-tungsten high-speed steel (HSS)** within the AISI M-series, featuring **moderate cobalt content (4.50-5.00%)** for improved high-temperature performance. Positioned between standard M2 and high-cobalt premium grades, M30 offers **enhanced hot hardness and wear resistance** while maintaining reasonable toughness and grindability. This grade represents an optimal **performance-to-cost balance** for applications requiring better high-temperature capability than standard M2 but without the extreme cost and grindability challenges of higher-cobalt grades. **Key Advantages:** - **Improved Hot Hardness:** Cobalt addition enhances cutting edge retention at elevated temperatures - **Good Wear Resistance:** Balanced carbide formers provide solid abrasion resistance - **Reasonable Toughness:** Maintains adequate impact resistance despite cobalt content - **Moderate Grindability:** More grindable than high-vanadium, high-cobalt grades - **Cost-Effective Upgrade:** Performance improvement over M2 without premium price of M42/M15 **Primary Considerations:** - Reduced toughness compared to standard M2 - More challenging to grind than non-cobalt grades - Requires careful heat treatment control - Not suitable for severe impact applications ## **International Designations & Standards** | Standard System | Designation | Note | |----------------|-------------|------| | **AISI/SAE (USA)** | M30 | Primary specification | | **UNS (USA)** | T11330 | Unified numbering system | | **ASTM (USA)** | A600 | High-Speed Tool Steel Standard | | **ISO (International)** | ~**HS6-5-2-5** | Similar cobalt-bearing composition | | **DIN (Germany)** | ~1.3243 | Cobalt-containing high-speed steel | | **JIS (Japan)** | ~SKH55 | Medium-cobalt high-speed steel | | **BS (UK)** | ~**BM34** | Cobalt-bearing HSS | | **GB (China)** | ~**W6Mo5Cr4V2Co5** | Similar cobalt HSS | | **AFNOR (France)** | ~Z85WDCV06-05-04-03-05 | French designation with cobalt | *Note: M30 occupies a specific niche with moderate cobalt content, offering a balanced upgrade over standard M2 for temperature-sensitive applications.* --- ## **1. Chemical Composition (Typical, Weight %)** M30's composition builds upon M2 with strategic cobalt addition for enhanced high-temperature performance. | Element | Content (%) | Role & Metallurgical Effect | |---------|-------------|-----------------------------| | **Carbon (C)** | 0.75 - 0.85 | Provides matrix hardness and supports carbide formation. Slightly lower than M2 to compensate for cobalt's hardening effect. | | **Cobalt (Co)** | 4.50 - 5.00 | **Key performance enhancer.** Increases red hardness, improves thermal conductivity, promotes secondary hardening response. | | **Tungsten (W)** | 1.30 - 2.30 | Lower than M2; works with molybdenum to provide hot hardness through carbide formation and solid solution strengthening. | | **Molybdenum (Mo)** | 8.00 - 9.00 | **Primary carbide former.** Higher than M2 to compensate for reduced tungsten, provides cost-effective hot hardness. | | **Chromium (Cr)** | 3.75 - 4.50 | Standard HSS level for hardenability and oxidation resistance. | | **Vanadium (V)** | 1.00 - 1.40 | Lower than M2; forms vanadium carbides for wear resistance while maintaining reasonable grindability. | | **Silicon (Si)** | 0.20 - 0.40 | Deoxidizer and matrix strengthener. | | **Manganese (Mn)** | 0.15 - 0.40 | Enhances hardenability. | | **Sulfur (S)** | ≤0.030 | Residual impurity. | | **Phosphorus (P)** | ≤0.030 | Residual impurity. | | **Iron (Fe)** | Balance | Matrix element. | **Composition Strategy:** - **Reduced Tungsten:** Lower W than M2 (1.30-2.30% vs 5.50-6.75%) - **Increased Molybdenum:** Higher Mo than M2 (8.00-9.00% vs 4.50-5.50%) - **Moderate Cobalt:** Significant but not extreme Co addition - **Reduced Vanadium:** Lower V than M2 for better grindability --- ## **2. Physical & Mechanical Properties** ### **Physical Properties** | Property | Typical Value | Conditions/Notes | |----------|---------------|------------------| | **Density** | 8.10 - 8.20 g/cm³ | At 20°C (68°F) | | **Melting Range** | 1360 - 1410°C (2480 - 2570°F) | | | **Thermal Conductivity** | 24 - 29 W/m·K | At 20°C (68°F) - Improved by cobalt | | **Specific Heat Capacity** | 425 - 465 J/kg·K | At 20°C (68°F) | | **Coefficient of Thermal Expansion** | 10.5 - 11.5 × 10⁻⁶/K | 20-600°C (68-1110°F) range | | **Electrical Resistivity** | 0.53 - 0.63 μΩ·m | At 20°C (68°F) | | **Elastic Modulus** | 205 - 215 GPa (29.7 - 31.2 × 10⁶ psi) | At room temperature | | **Thermal Diffusivity** | 6.5 - 7.5 mm²/s | At 20°C (68°F) | ### **Mechanical Properties (Properly Heat-Treated)** | Property | Value Range | Heat Treatment Condition | |----------|-------------|--------------------------| | **Hardness (Annealed)** | 217 - 255 HB | Annealed condition | | **Hardness (Hardened)** | 64 - 67 HRC | Triple tempered condition | | **Hot Hardness (600°C)** | 56 - 59 HRC | After 4 hours at temperature | | **Transverse Rupture Strength** | 3200 - 3800 MPa (464 - 551 ksi) | At 65-66 HRC | | **Compressive Strength** | 3700 - 4300 MPa (537 - 624 ksi) | At 65-66 HRC | | **Impact Toughness (Charpy)** | 15 - 25 J (11 - 18 ft·lb) | At 65-66 HRC | | **Young's Modulus** | 205 - 215 GPa (29.7 - 31.2 × 10⁶ psi) | At room temperature | | **Fatigue Strength** | 750 - 900 MPa (109 - 131 ksi) | Rotating bending, 10⁷ cycles | ### **High-Temperature Performance Comparison** | Temperature | M30 Hardness (HRC) | M2 Hardness (HRC) | Performance Advantage | |-------------|---------------------|--------------------|-----------------------| | **20°C (68°F)** | 65-66 | 64-65 | +0.5-1.0 HRC | | **300°C (570°F)** | 61-63 | 60-62 | +1.0-1.5 HRC | | **450°C (840°F)** | 57-60 | 56-58 | +1.0-2.0 HRC | | **550°C (1020°F)** | 53-56 | 52-54 | +1.0-2.0 HRC | | **600°C (1110°F)** | 49-52 | 48-50 | +1.0-2.0 HRC | ### **Grindability Characteristics** - **Relative Grindability:** 80-90% (compared to M2 = 100%) - **Wheel Wear:** 10-20% higher than M2 - **Power Requirement:** 15-25% higher than M2 - **Recommended Abrasives:** Aluminum oxide (premium grade) or CBN - **Coolant Requirement:** Moderate to high volume --- ## **3. Product Applications** ### **Primary Application Areas** **1. Elevated Temperature Cutting:** - Drills for stainless steels and heat-resistant alloys - End mills for moderate-temperature applications - Taps for difficult-to-machine materials - Reamers for precision holes in tough materials **2. Moderate Performance Requirements:** - Gear hobs for automotive and general industry - Broaches for production machining - Milling cutters for alloy steels - Form tools for continuous cutting operations **3. Specialized Applications:** - Cutting tools for weldments and castings - Tools for machining hardened steels (up to 45 HRC) - Woodworking tools for abrasive composites - Cutting tools for non-ferrous alloys requiring high speeds ### **Industry-Specific Applications** | Industry | Typical M30 Components | Performance Benefit | |----------|-----------------------|---------------------| | **Automotive** | Gear cutters, form tools | Better high-speed performance | | **General Machining** | Drills, end mills for alloys | Extended tool life in warm conditions | | **Aerospace (Secondary)** | Cutting tools for aluminum alloys | Higher permissible speeds | | **Mold & Die** | Hard milling cutters | Better edge retention | | **Energy** | Tools for valve components | Improved high-temperature capability | ### **Recommended Cutting Parameters** | Work Material | Cutting Speed (m/min) | vs M2 Improvement | Application Notes | |---------------|----------------------|-------------------|------------------| | **Low-Alloy Steels** | 35-55 | +5-15% | Dry or wet machining | | **Stainless Steels** | 25-45 | +10-20% | Copious coolant recommended | | **Cast Iron** | 40-65 | +5-10% | Dry or minimal coolant | | **High-Temp Alloys** | 20-40 | +15-25% | High-pressure coolant | | **Aluminum Alloys** | 150-300 | +10-20% | High-speed capable | --- ## **4. Heat Treatment Guidelines** ### **Annealing** - **Temperature:** 840-870°C (1545-1600°F) - **Soaking Time:** 2-4 hours - **Cooling Rate:** ≤15°C/hr to 540°C, then air cool - **Hardness Result:** 217-255 HB - **Atmosphere:** Protective recommended ### **Stress Relieving** - **After Machining:** 600-650°C (1110-1200°F), 1-2 hours - **After Rough Grinding:** 500-550°C (930-1020°F), 1 hour ### **Hardening** 1. **Preheating:** - **Stage 1:** 450-550°C (840-1020°F) - **Stage 2:** 800-850°C (1470-1560°F) 2. **Austenitizing:** - **Temperature:** 1190-1220°C (2175-2230°F) - **Time:** 2-5 minutes per 25mm thickness - **Atmosphere:** Controlled atmosphere or vacuum essential 3. **Quenching:** - **Oil Quench:** 40-80°C oil, good agitation - **Salt Bath:** 540-590°C marquench option - **Air Cool:** Limited to simple shapes <25mm ### **Tempering** - **Temperature:** 540-570°C (1000-1060°F) - **Cycles:** Minimum 3 tempers recommended - **Duration:** 1-2 hours per temper - **Final Hardness:** 64-67 HRC - **Note:** Higher tempering temperatures may be used for specific toughness requirements ### **Sub-Zero Treatment** - **Recommended:** Yes, for optimal performance - **Temperature:** -70 to -100°C (-95 to -150°F) - **Duration:** 2-4 hours after quenching - **Benefits:** Improved dimensional stability, full hardness potential --- ## **5. Manufacturing & Processing** ### **Machinability (Annealed)** - **Relative Rating:** 40-50% (vs. 1% carbon steel = 100%) - **Tool Material:** Carbide required for efficient machining - **Parameters:** - Turning: 20-35 m/min (65-115 SFM) with carbide - Milling: 15-25 m/min (50-80 SFM) with carbide - Drilling: 8-12 m/min (25-40 SFM) with carbide ### **Grinding Operations** - **Wheel Selection:** A46-J8-V or premium aluminum oxide - **Parameters:** - Speed: 25-30 m/s (5000-6000 SFPM) - Infeed: 0.005-0.015 mm/pass - Crossfeed: 1-3 mm/pass - **Coolant:** Water-based synthetic, adequate flow ### **Surface Treatments & Coatings** - **Recommended Coatings:** TiN, TiCN, TiAlN - **Coating Benefits:** 2-4x tool life improvement - **Pre-coating Preparation:** Proper edge honing essential - **Post-coating:** Gentle handling to prevent coating damage --- ## **6. Comparative Analysis** ### **vs. Other Cobalt-Containing HSS** | Property | M30 | M35 (5%Co) | M42 (8%Co) | M15 (5%Co, High-V) | |----------|-----|------------|------------|-------------------| | **Cobalt Content** | 4.50-5.00% | 4.50-5.00% | 7.50-8.50% | 4.50-5.50% | | **Vanadium Content** | 1.00-1.40% | 1.75-2.20% | 1.15-1.85% | 4.50-5.25% | | **Hot Hardness** | Good | Very Good | Excellent | Excellent | | **Wear Resistance** | Good | Good | Good | Outstanding | | **Toughness** | Fair-Good | Fair | Fair | Poor | | **Grindability** | Good | Fair | Poor | Very Poor | | **Cost Factor** | 1.4x | 1.5x | 2.0x | 2.2x | ### **Performance/Cost Positioning** | Grade | Relative Performance | Relative Cost | Best Application Fit | |-------|---------------------|---------------|---------------------| | **M2** | 100% | 100% | General purpose | | **M30** | 115-125% | 140-150% | Elevated temperature general purpose | | **M35** | 120-130% | 150-160% | Balanced high-performance | | **M42** | 140-160% | 200-220% | High-temperature demanding | | **M15** | 130-150% | 220-250% | Severe abrasion high-temperature | --- ## **7. Quality Standards & Economics** ### **Economic Considerations** - **Material Cost:** 40-50% premium over standard M2 - **Tool Life Improvement:** 20-40% over M2 in appropriate applications - **Grinding Cost:** 10-20% higher than M2 - **Total Cost of Ownership:** Favorable when high-temperature performance needed ### **Quality Specifications** - **Decarburization:** Max 0.08mm per side - **Hardness Uniformity:** ±1.5 HRC acceptable - **Microstructure:** Uniform carbide distribution - **Surface Finish:** As required by tool design ### **Market Position** - **Primary Competition:** M35, lower-cobalt alternatives - **Market Share:** Smaller niche than M2 or M42 - **Availability:** Readily available from major producers - **Future Outlook:** Stable niche position --- ## **8. Technical Recommendations** ### **Selection Guidelines** **Choose M30 when:** - Operating temperatures exceed M2 capabilities but don't require M42 performance - Moderate improvement in hot hardness needed - Budget constraints limit use of premium cobalt grades - Reasonable grindability required **Consider alternatives when:** - Maximum high-temperature performance needed (choose M42/M15) - Severe impact conditions (choose lower hardness/tougher grade) - Extreme abrasion (choose higher vanadium grade) - Cost is primary driver (choose M2) ### **Application Best Practices** 1. **Start with Conservative Parameters:** Begin at M2 parameters, then optimize upward 2. **Monitor Tool Temperature:** Avoid excessive heat generation 3. **Use Appropriate Coolants:** High-performance coolants recommended 4. **Implement Regular Inspection:** Early detection of wear patterns ### **Limitations & Constraints** - **Not for:** Severe interrupted cuts - **Avoid:** Excessive feed rates in hard materials - **Limit:** Use in applications with severe impact - **Monitor:** Edge condition regularly in high-temperature applications --- ## **Disclaimer** This technical datasheet provides information about AISI Type M30 high-speed tool steel based on industry standards and typical applications. Actual properties and performance may vary depending on specific manufacturing processes, heat treatment execution, and application conditions. **Important Notes:** - M30 represents a specific performance niche between standard and premium HSS grades - Proper heat treatment is essential for achieving desired properties - Application optimization through parameter adjustment is recommended - Consult with materials specialists for critical applications For current specifications and detailed technical data, refer to: - ASTM A600: Standard Specification for Tool Steel High Speed - Manufacturer's technical datasheets - Application-specific testing and validation This information is subject to revision as technology and market requirements evolve. Always verify current specifications with your materials supplier. -:- For detailed product information, please contact sales. -: AISI Type M30 Molybdenum High Speed Tool Steel (UNS T11330) Specification Dimensions Size： Diameter 20-1000 mm Length <6719 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. -: AISI Type M30 Molybdenum High Speed Tool Steel (UNS T11330) Properties -:- For detailed product information, please contact sales. -:

Applications of AISI Type M30 Molybdenum High Speed Tool Steel (UNS T11330) -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI Type M30 Molybdenum High Speed Tool Steel (UNS T11330) -:- For detailed product information, please contact sales. -:

Packing of AISI Type M30 Molybdenum High Speed Tool Steel (UNS T11330) -:- 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 3190 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