Latrobe,Tatmo-V™ AISI M7 High Speed Steel Foil/Strip

Latrobe Tatmo-V™ AISI M7 High Speed Steel Foil Product Information -:- For detailed product information, please contact sales. -: Latrobe Tatmo-V™ AISI M7 High Speed Steel Foil Synonyms -:- For detailed product information, please contact sales. -:

Latrobe Tatmo-V™ AISI M7 High Speed Steel Product Information -:- For detailed product information, please contact sales. -: ### **Product Datasheet: Latrobe Tatmo-V™ AISI M7 High-Speed Steel (HSS)** **1. Product Overview** Latrobe Tatmo-V™ is a balanced, molybdenum-tungsten high-speed steel conforming to the AISI M7 specification. It is engineered to provide an **optimal combination of wear resistance, toughness, and cost-effectiveness** for a broad range of general-purpose and demanding cutting applications. The "Tatmo-V" name reflects its core alloying philosophy: high **Ta**ngsten and **Mo**lybdenum with enhanced **V**anadium, offering a versatile performance profile that bridges the gap between M1/M2 and higher-alloy grades like M3. **2. Key Features & Benefits** * **Excellent Balance of Properties:** Delivers a more favorable mix of wear resistance (from higher vanadium) and toughness than standard M2, without the significant cost or grindability challenges of higher-vanadium grades like M3 or M4. * **Superior Wear Resistance to M2:** The increased vanadium content provides improved resistance to abrasive wear, extending tool life in many applications. * **Good Toughness & Strength:** Maintains sufficient toughness to handle interrupted cuts and mild shock loads better than more highly alloyed grades. * **Favorable Grindability:** Compared to M3 and M4 grades, M7 offers significantly better grindability, reducing manufacturing costs and complexity for toolmakers. * **Cost-Effective Performance:** Often represents the best performance-to-cost ratio for applications requiring more than M2 but where the full capabilities (and costs) of M3/M4 are not justified. **3. Standard Chemical Composition (Weight %)** Tatmo-V™ is manufactured to the precise requirements of AISI M7. The typical analysis is: | Element | Content (%) | Element | Content (%) | | :--- | :--- | :--- | :--- | | **Carbon (C)** | 0.97 - 1.05 | **Tungsten (W)** | 1.40 - 2.10 | | **Chromium (Cr)** | 3.50 - 4.00 | **Vanadium (V)** | 1.75 - 2.25 | | **Molybdenum (Mo)**| 8.20 - 9.20 | **Cobalt (Co)** | - | | **Manganese (Mn)** | 0.15 - 0.40 | **Sulfur (S)** | ≤ 0.03 | | **Silicon (Si)** | 0.20 - 0.45 | **Phosphorus (P)** | ≤ 0.03 | *(Note: The key characteristics are the **high molybdenum** content (primary hardening element), moderate tungsten, and a **vanadium level notably higher than M2** but lower than M3.)* **4. Typical Physical & Mechanical Properties** * **Density:** ~8.10 g/cm³ (0.293 lb/in³) * **Thermal Conductivity:** Low, typical of molybdenum-rich HSS. * **Coefficient of Thermal Expansion:** ~11.2 x 10⁻⁶ /K (20-400°C) * **Hardness (Annealed):** Maximum 255 HB * **Hardness (Hardened & Tempered):** **64 - 66 HRC** (Standard range; can be adjusted via heat treatment for specific balance of wear vs. toughness). **5. Primary Applications** Tatmo-V™ (M7) is a versatile grade selected for a wide array of cutting tools where a step up from M2 is needed: * **General-Purpose Cutting Tools:** Drills, taps, reamers, and end mills for machining alloy steels, stainless steels, and cast irons. * **Forming & Cutting Tools:** Broaches, gear hobs, and form tools that benefit from its improved wear resistance over M2. * **Saw Blades & Cutting Knives:** Band saw blades, hacksaw blades, and industrial knives for cutting tough materials. * **Punches and Dies:** For cold work applications requiring a good balance of wear resistance and toughness. **6. Relevant International Standards** Latrobe Tatmo-V™ is produced to meet or exceed the following international standards: * **AISI:** M7 * **ASTM A600-92 (Reapproved):** Standard Specification for High-Speed Steel (listed under M7). * **UNS:** T11307 * **Equivalent Designations:** * **DIN:** 1.3348 (Note: Closer to M2 with Co; M7 has no direct DIN equivalent but is similar in performance to some proprietary modifications) * **ISO:** HS2-9-2 * **JIS:** SKH58 **7. Comparison & Selection Guidance** * **vs. AISI M2:** Tatmo-V™ (M7) offers better wear resistance due to higher vanadium, with comparable or slightly better toughness. It is a direct upgrade for applications where M2 tools wear out too quickly. * **vs. AISI M1:** M7 provides significantly better wear resistance and hot hardness. * **vs. AISI M3/M4:** M7 offers better toughness and much better grindability at the expense of some ultimate wear resistance. It is the preferred choice when grindability and cost are concerns, and extreme abrasion is not the primary issue. **8. Disclaimer** The information provided is typical and for reference purposes. Actual properties can vary based on processing, heat treatment, and section size. For critical applications, consultation with Latrobe's technical service team and conducting application-specific testing is strongly recommended. --- **LATROBE SPECIALTY METALS** *Performance Alloys for Demanding Applications* -:- For detailed product information, please contact sales. -: Latrobe Tatmo-V™ AISI M7 High Speed Steel Specification Dimensions Size： Diameter 20-1000 mm Length <5336 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-V™ AISI M7 High Speed Steel Properties -:- For detailed product information, please contact sales. -:

Applications of Latrobe Tatmo-V™ AISI M7 High Speed Steel Foil -:- For detailed product information, please contact sales. -: Chemical Identifiers Latrobe Tatmo-V™ AISI M7 High Speed Steel Foil -:- For detailed product information, please contact sales. -:

Packing of Latrobe Tatmo-V™ AISI M7 High Speed Steel Foil/Strip -:- 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 Foil/Strip 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 1807 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