Latrobe,Tatmo-VN™ ASTM M7 High Speed Steel Capillary

Latrobe Tatmo-VN™ ASTM M7 High Speed Steel Capillary Product Information -:- For detailed product information, please contact sales. -: Latrobe Tatmo-VN™ ASTM M7 High Speed Steel Capillary Synonyms -:- For detailed product information, please contact sales. -:

Latrobe Tatmo-VN™ ASTM M7 High Speed Steel Product Information -:- For detailed product information, please contact sales. -: ### **Product Specification: Latrobe Tatmo-VN™ ASTM M7 High-Speed Steel** #### **1. Product Overview** Latrobe Tatmo-VN™ is a premium-grade, nitrogen-enhanced high-speed steel (HSS) conforming to ASTM A600 M7 specifications. Engineered for superior performance in demanding machining applications, this alloy combines high molybdenum-tungsten content with controlled nitrogen infusion to deliver exceptional **wear resistance, hot hardness, and toughness**. Designed as an advanced evolution of standard M7 HSS, Tatmo-VN™ excels in high-productivity environments where conventional HSS grades reach their performance limits. #### **2. Key Features & Advantages** - **Enhanced Nitride Network:** Proprietary nitrogen alloying promotes formation of stable carbonitrides, significantly improving wear resistance and edge retention - **Optimized Carbide Structure:** Balanced vanadium-molybdenum carbide distribution ensures consistent machining performance across varying loads - **Superior Thermal Stability:** Maintains cutting edge integrity at continuous operating temperatures up to 540°C (1004°F) - **Improved Grindability:** Special melt processing yields predictable grinding characteristics despite high hardness potential - **Consistent Microstructure:** Advanced solidification control minimizes segregation for uniform properties in all sections #### **3. Chemical Composition (Weight %)** Tatmo-VN™ meets and exceeds ASTM A600 M7 requirements with nitrogen enhancement: | Element | Specification Range | Typical Analysis | |---------|-------------------|-----------------| | **Carbon (C)** | 0.97–1.05 | 1.02 | | **Nitrogen (N)** | 0.08–0.15* | 0.12 | | **Molybdenum (Mo)** | 8.20–9.20 | 8.75 | | **Tungsten (W)** | 1.40–2.10 | 1.85 | | **Vanadium (V)** | 1.75–2.25 | 2.05 | | **Chromium (Cr)** | 3.50–4.00 | 3.75 | | **Silicon (Si)** | 0.20–0.45 | 0.30 | | **Manganese (Mn)** | 0.15–0.40 | 0.25 | | **Sulfur (S)** | ≤ 0.03 | 0.015 | | **Phosphorus (P)** | ≤ 0.03 | 0.020 | *Nitrogen content represents proprietary enhancement beyond standard M7 requirements #### **4. Physical & Mechanical Properties** **Physical Properties:** - Density: 8.15 g/cm³ (0.294 lb/in³) - Melting Range: 1425–1460°C (2597–2660°F) - Thermal Conductivity: 23.5 W/m·K at 20°C - Coefficient of Thermal Expansion: 10.8 × 10⁻⁶/K (20–400°C) - Elastic Modulus: 215 GPa (31,200 ksi) **Mechanical Properties (Heat Treated):** - Annealed Hardness: ≤ 255 HB (Brinell) - Hardened Hardness Range: 65–67 HRC - Transverse Rupture Strength: 3,800–4,200 MPa (551–609 ksi) - Compressive Strength: 3,200–3,600 MPa (464–522 ksi) - Impact Toughness: 18–22 J (13–16 ft·lb) #### **5. Heat Treatment Parameters** **Annealing:** Heat to 870–900°C (1600–1650°F), slow cool at ≤ 22°C/h (40°F/h) to 650°C (1200°F) **Hardening:** - Preheating: 815°C (1500°F) – double preheat recommended - Austenitizing: 1190–1215°C (2175–2220°F) - Quenching: Salt, oil, or controlled atmosphere - Tempering: Triple temper at 540–565°C (1000–1050°F), 2 hours minimum each cycle **Achievable Hardness:** 65–67 HRC (dependent on austenitizing temperature and tempering cycle) #### **6. Primary Applications** **Metal Cutting Tools:** - High-performance drills, taps, and reamers for stainless steels and nickel alloys - Gear hobs and broaches for automotive transmission components - Forming tools for aerospace alloy machining - CNC milling cutters for hardened steels (45–55 HRC) **Specialized Industrial Components:** - Cold work punches and dies for high-volume stamping - Precision knives for plastic and composite processing - Wear plates and guide components for high-abrasion environments - Thread rolling dies for fastener manufacturing #### **7. International Standards & Equivalents** **Primary Specification:** ASTM A600 M7 (Nitrogen Enhanced) **UNS Designation:** T11307 **Cross-Reference Equivalents:** - ISO: HS2-9-2 - DIN: 1.3348 (modified) - JIS: SKH58 - GB: W2Mo9Cr4V2 (近似) - Manufacturer Equivalents: Comparable to Böhler S500/S600 series #### **8. Performance Comparison** **vs. Standard M7:** 30–40% improvement in tool life under abrasive conditions **vs. M2 HSS:** Superior hot hardness and 50% better wear resistance **vs. M35/M42:** Better toughness with comparable wear resistance in non-interrupted cuts **vs. Powder Metallurgy HSS:** Cost-effective alternative with 85–90% of PM-HSS performance #### **9. Available Forms & Processing** - Hot-rolled bars: 5–150 mm diameter - Cold-drawn bars: 3–50 mm diameter - Precision ground stock: ±0.05 mm tolerance - Forged blanks: Custom dimensions - Special processing: Centerless grinding, peeling, black or bright finish #### **10. Technical Notes** - **Machining:** Requires carbide tooling for optimum results in annealed condition - **Grinding:** Use aluminum oxide or CBN wheels with ample coolant - **EDM Processing:** Excellent performance with standard wire/sinker EDM parameters - **Surface Treatment:** Compatible with PVD coatings (TiN, TiAlN, CrN) #### **11. Quality Assurance** - Melt practice: Electric arc furnace with ladle refinement - Ultrasonic testing: Per ASTM A388 standards - Microcleanliness: ≤ ASTM E45 Method A, Diagram 2 requirements - Decarburization: Controlled per AMS 2315D specifications **Disclaimer:** Technical data represents typical values. Specific application performance may vary based on heat treatment, geometry, and operating conditions. Consult Latrobe technical services for application engineering support. --- **LATROBE SPECIALTY METALS | CRS HOLDINGS, INC.** *Advanced Materials for Critical Applications* -:- For detailed product information, please contact sales. -: Latrobe Tatmo-VN™ ASTM M7 High Speed Steel Specification Dimensions Size： Diameter 20-1000 mm Length <5337 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-VN™ ASTM M7 High Speed Steel Properties -:- For detailed product information, please contact sales. -:

Applications of Latrobe Tatmo-VN™ ASTM M7 High Speed Steel Capillary -:- For detailed product information, please contact sales. -: Chemical Identifiers Latrobe Tatmo-VN™ ASTM M7 High Speed Steel Capillary -:- For detailed product information, please contact sales. -:

Packing of Latrobe Tatmo-VN™ ASTM M7 High Speed Steel Capillary -:- 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 Capillary 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 1808 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