AISI Type M62 Molybdenum High Speed Tool Steel Tube,Pipe (UNS T11362)

AISI Type M62 Molybdenum High Speed Tool Steel Tube (UNS T11362) Product Information -:- For detailed product information, please contact sales. -: AISI Type M62 Molybdenum High Speed Tool Steel Tube (UNS T11362) Synonyms -:- For detailed product information, please contact sales. -:

AISI Type M62 Molybdenum High Speed Tool Steel (UNS T11362) Product Information -:- For detailed product information, please contact sales. -: # **Product Introduction: AISI Type M62 Molybdenum High-Speed Tool Steel (UNS T11362)** ## **Overview** **AISI M62 (UNS T11362)** is a **cobalt-free, high-carbon, high-vanadium molybdenum high-speed steel** engineered to deliver **exceptional abrasion resistance and high attainable hardness** without the use of strategic cobalt alloying. Positioned as a **cost-effective alternative to premium cobalt-bearing grades** like M4 and M42 for wear-intensive applications, M62 achieves its performance through a balanced yet aggressive increase in carbon, vanadium, and molybdenum. It is a specialized grade chosen primarily for its outstanding wear life in machining abrasive materials, offering a compelling balance of performance and cost. ## **1. Chemical Composition (Nominal %)** | Element | Content (%) | Primary Function | |---------|------------|------------------| | **Carbon (C)** | 1.25 - 1.35 | **High carbon content** to drive the formation of abundant hard carbides and provide high matrix hardness. | | **Tungsten (W)** | 5.75 - 6.75 | Contributes to hot hardness and secondary hardening; forms stable carbides. | | **Molybdenum (Mo)** | 10.00 - 11.00 | **Very high content.** Primary hardening element; provides outstanding hardenability, hot strength, and promotes fine grain structure. | | **Chromium (Cr)** | 3.75 - 4.50 | Enhances hardenability and wear/oxidation resistance. | | **Vanadium (V)** | 1.80 - 2.20 | **High content.** Forms hard, wear-resistant vanadium carbides (MC-type). | | **Cobalt (Co)** | **Not Present** | Key cost-saving feature; performance derived from other alloying elements. | | **Silicon (Si)** | 0.15 - 0.40 | Deoxidizer. | | **Manganese (Mn)** | 0.15 - 0.40 | Aids hardenability. | | **Sulfur (S)** | ≤ 0.03 | Residual. | | **Phosphorus (P)** | ≤ 0.03 | Residual. | | **Iron (Fe)** | Balance | Base metal. | **Key Chemistry Note:** M62 is characterized by its **very high molybdenum (Mo) content**, one of the highest in the standard M-series, and a **high carbon-to-vanadium ratio**. This combination is designed to maximize secondary hardening response and wear resistance through a dense dispersion of molybdenum and vanadium carbides. The absence of cobalt makes it an economically attractive option for achieving high hardness (up to 67 HRC) and good red-hardness. ## **2. Physical & Mechanical Properties** | Property | Typical Value / Condition | |----------|--------------------------| | **Density** | ~8.05 g/cm³ (0.291 lb/in³) | | **Melting Point** | ~1410°C (2570°F) | | **Thermal Conductivity** | Low (~26 W/m·K at 20°C) | | **Coefficient of Thermal Expansion** | ~11.3 × 10⁻⁶/K (20-540°C) | | **Modulus of Elasticity** | ~205 GPa (29.7 × 10⁶ psi) | | **Annealed Hardness** | 248-285 HB | | **Hardened & Tempered Hardness** | **65-68 HRC** (Can reliably achieve 66-67 HRC with proper heat treatment). | | **Red Hardness** | **Very Good.** Superior to M2; maintains hardness effectively up to ~570°C (1060°F), though slightly below equivalent cobalt grades. | | **Abrasion Resistance** | **Excellent.** The high volume of hard carbides provides wear resistance comparable to many cobalt-bearing grades. | | **Toughness** | **Moderate to Low.** The high carbide volume reduces impact resistance compared to lower-alloy HSS like M2. Careful tool design is necessary. | | **Tempering Temperature** | 540-590°C (1000-1095°F), **triple tempering is strongly recommended**. | | **Grindability** | **Difficult** (~40-45% relative to M2). High vanadium carbide content requires appropriate grinding wheels and techniques. | ## **3. International Standards & Cross-References** | Standard | Designation | Notes | |----------|------------|-------| | **UNS** | T11362 | | | **AISI/ASTM (USA)** | M62 (ASTM A600) | | | **ISO (International)** | **HS 10-7-2** (ISO 4957) | Closest functional equivalent. | | **DIN (Germany)** | **~1.3245** | Approximate equivalent (S 10-7-2 type). | | **JIS (Japan)** | No direct common equivalent. | | | **GB (China)** | **W10Mo7Cr4V2** | Approximate composition. | | **Common Name** | **High Molybdenum, Cobalt-Free HSS** | | ## **4. Product Applications** M62 is designed for applications where **abrasive wear is the primary failure mode** and the extreme red-hardness of cobalt grades is not absolutely required, offering a cost-saving advantage. ### **Primary Cutting Applications:** * **Machining Abrasive Materials:** * **Cast Irons:** Especially abrasive and alloyed cast irons. * **Heat-Resistant Alloys:** Certain stainless steels and superalloys in finishing operations. * **Non-Ferrous Alloys:** High-silicon aluminum alloys, bronze, and other abrasive non-ferrous metals. * **Plastics & Composites:** Reinforced plastics (e.g., fiberglass). * **Specific Tool Types:** * **End mills, drills, and taps** for the above materials where extended tool life is critical. * **Broaches, gear hobs, and form tools** for production machining of abrasive components. * **Turning inserts** (as brazed tips) for finishing cuts. ### **Non-Cutting Wear Applications:** * **Cold work tooling:** Punches, dies, and forming rolls for abrasive sheet metal or wire. * **Shear blades and slitter knives.** * **Wear parts** in industrial equipment subject to abrasive conditions. ### **Performance Context:** M62 fills a niche for **severe abrasive wear problems where M2 fails too quickly, but the full cost of M42 (Co8%) is not justified.** It provides a significant step up in wear resistance from M2 or M7, approaching the performance of some cobalt grades at a lower material cost. Its higher hardness capability also makes it suitable for machining pre-hardened steels. ## **5. Processing & Heat Treatment Guidelines** M62 requires careful heat treatment due to its high alloy content and hardenability. ### **Forging:** * Heat uniformly to **1060-1120°C (1940-2050°F)**. * Do not forge below **930°C (1705°F)**. * Cool slowly in insulating material or furnace. ### **Annealing:** * Heat to **845-870°C (1555-1600°F)**, hold, then furnace cool slowly to **500°C (930°F)**. * Expected annealed hardness: 248-285 HB. ### **Hardening:** 1. **Preheat:** Essential. Use two stages: 550-650°C (1020-1200°F) and 800-850°C (1470-1560°F). 2. **Austenitize:** **1180-1210°C (2155-2210°F).** Precise temperature control is important. The high molybdenum content allows effective hardening at the lower end of this range. 3. **Quench:** In salt bath, oil, or vacuum furnace with gas quenching. ### **Tempering (Critical for Performance):** * **Temper immediately** after quenching to 40-50°C (105-120°F). * Temper at **540-570°C (1005-1060°F)** for 2+ hours per cycle. * **Triple tempering is strongly advised** to ensure complete transformation of retained austenite and to achieve maximum hardness and dimensional stability. * **Cryogenic treatment** between tempers can further enhance final properties. ## **6. Machinability & Grindability** * **Machinability (Annealed):** **Poor** (~45% of M2). Requires rigid setups, sharp tools, and lower speeds/feeds. * **Grindability:** **Difficult.** The vanadium carbides are abrasive to grinding wheels. * **Recommended:** Use aluminum oxide (Al₂O₃) or CBN wheels. Avoid excessive infeeds to prevent grinding burns. * Adequate coolant is essential. --- **Disclaimer:** The information provided is for reference and educational purposes. AISI M62 is a specialized tool steel requiring precise heat treatment and application knowledge. Its performance is highly dependent on correct processing. Always consult the material supplier's certified technical data sheets and engage qualified metallurgical expertise for heat treatment specification and tool design. Actual properties may vary based on manufacturing method (e.g., conventional vs. ESR melting). -:- For detailed product information, please contact sales. -: AISI Type M62 Molybdenum High Speed Tool Steel (UNS T11362) Specification Dimensions Size： Diameter 20-1000 mm Length <6738 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 M62 Molybdenum High Speed Tool Steel (UNS T11362) Properties -:- For detailed product information, please contact sales. -:

Applications of AISI Type M62 Molybdenum High Speed Tool Steel Tube (UNS T11362) -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI Type M62 Molybdenum High Speed Tool Steel Tube (UNS T11362) -:- For detailed product information, please contact sales. -:

Packing of AISI Type M62 Molybdenum High Speed Tool Steel Tube (UNS T11362) -:- 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 Tube 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 3209 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