Latrobe,HS-105™ ASTM M35 DIN 1.3243 High Speed Steel Foil/Strip

Latrobe HS-105™ ASTM M35 DIN 1.3243 High Speed Steel Foil Product Information -:- For detailed product information, please contact sales. -: Latrobe HS-105™ ASTM M35 DIN 1.3243 High Speed Steel Foil Synonyms -:- For detailed product information, please contact sales. -:

Latrobe HS-105™ ASTM M35 DIN 1.3243 High Speed Steel Product Information -:- For detailed product information, please contact sales. -: ### **Product Datasheet: Latrobe HS-105™ ASTM M35 / DIN 1.3243 Cobalt High-Speed Steel** --- #### **1. Product Overview** **Latrobe HS-105™** is a premium cobalt-enriched high-speed steel that meets both **ASTM A600 M35** and **DIN 1.3243** specifications. As a 5% cobalt modification of the classic M2 grade, HS-105™ is engineered to deliver significantly enhanced **red hardness (hot hardness)** and **wear resistance** at elevated temperatures. It is the ideal choice for demanding machining operations where cutting edges are subjected to high thermal loads, bridging the gap between standard high-speed steels and more expensive super-high-speed grades. --- #### **2. Key Features & Benefits** * **Superior Red Hardness:** The 5% cobalt addition dramatically improves the steel's ability to retain hardness and cutting-edge integrity at temperatures exceeding 600°C (1112°F), enabling higher cutting speeds and feeds. * **Excellent Wear Resistance:** A balanced carbide structure (from vanadium and tungsten) provides strong resistance to abrasive wear, extending tool life in difficult-to-machine materials. * **Good Toughness Balance:** Maintains better toughness than higher-cobalt grades (e.g., M42), making it suitable for applications with moderate interruptions or shock loads. * **Versatile Performance:** Consistently outperforms standard M2 in production environments where thermal buildup is a primary cause of tool failure. --- #### **3. Chemical Composition (Weight %)** HS-105™ conforms to the strict requirements for M35 / 1.3243 with a typical analysis as follows: | Element | ASTM M35 / DIN 1.3243 Range | Typical HS-105™ Analysis | | :--- | :--- | :--- | | **Carbon (C)** | 0.88 - 0.96 | 0.92 | | **Cobalt (Co)** | 4.50 - 5.50 | 5.00 | | **Tungsten (W)** | 5.90 - 6.70 | 6.30 | | **Molybdenum (Mo)**| 4.70 - 5.20 | 4.95 | | **Chromium (Cr)** | 3.70 - 4.20 | 3.95 | | **Vanadium (V)** | 1.70 - 2.10 | 1.90 | | **Manganese (Mn)** | 0.15 - 0.40 | 0.30 | | **Silicon (Si)** | 0.20 - 0.45 | 0.35 | | **Sulfur (S)** | ≤ 0.03 | 0.015 | | **Phosphorus (P)** | ≤ 0.03 | 0.020 | --- #### **4. Physical & Mechanical Properties** **Physical Properties:** * **Density:** 8.15 g/cm³ (0.294 lb/in³) * **Melting Range:** ~1420–1460°C (2588–2660°F) * **Thermal Conductivity:** Slightly higher than standard M2 due to cobalt. * **Coefficient of Thermal Expansion:** ~11.3 × 10⁻⁶/K (20–400°C) **Mechanical Properties (Heat Treated):** * **Annealed Hardness:** ≤ 255 HB * **Hardened & Tempered Hardness:** **65 - 67 HRC** * **Transverse Rupture Strength:** ~3,500 – 4,000 MPa * **Key Characteristic:** Exceptional secondary hardening response during tempering, achieving peak hardness at 520–560°C. --- #### **5. Heat Treatment Guidelines** **Annealing:** Heat to 850–880°C (1562–1616°F), slow cool (≤ 22°C/h) to 600°C. **Hardening:** * **Preheating:** 800–850°C (1472–1562°F) – crucial for complex shapes. * **Austenitizing:** 1210–1240°C (2210–2264°F) – precise control is essential. * **Quenching:** Oil, salt, or pressurized gas. * **Tempering:** **Triple tempering is mandatory.** Temper at 540–570°C (1004–1058°F) for 2+ hours each cycle. Hardness peaks after the second or third temper. --- #### **6. Primary Applications** HS-105™ (M35) is specified for tools that require greater hot hardness than M2 can provide: * **Cutting Tools for Hard/Abvasive Materials:** Drills, taps, end mills, and reamers for machining stainless steels, high-temperature alloys (e.g., Inconel), and hardened alloy steels. * **High-Speed Production Tools:** Gear hobs, broaches, and form tools where increased cutting speeds are needed to boost productivity. * **Precision Tools:** CNC tooling for milling and turning where consistent performance under thermal stress is critical. * **Cold Work Tools:** Punches and dies for forming high-strength materials where die wear is accelerated by frictional heat. --- #### **7. International Standards & Equivalents** **Primary Standards:** * **ASTM:** A600 M35 * **DIN / EN:** 1.3243 * **UNS:** T11335 **Cross-Reference Equivalents:** * **ISO:** HS6-5-2-5 * **JIS:** SKH55 (Very close; JIS standard typically references 5% Co) * **AFNOR:** Z 130 WDCV 06-05-04-02 * **GB:** W6Mo5Cr4V2Co5 (近似) --- #### **8. Performance Comparison** * **vs. M2 (HS-6-5-2 / 1.3343):** HS-105™ offers significantly better hot hardness and wear resistance at high temperatures, allowing for 15-30% higher cutting speeds. * **vs. M42 (8% Co):** HS-105™ offers better toughness and grindability, while M42 achieves higher peak hardness and slightly better red hardness. * **General:** It is the **standard choice for cobalt HSS** when a reliable upgrade from M2 is needed without moving to the more sensitive and expensive ultra-high-cobalt grades. --- #### **9. Available Forms & Processing Notes** * **Forms:** Hot-rolled & forged bars, cold-drawn bars, precision ground stock. * **Machining:** Use carbide tooling in the annealed state. * **Grinding:** Use aluminum oxide or CBN wheels with ample coolant. Grindability is lower than M2 but better than M42. * **Coatings:** An excellent substrate for PVD coatings (TiN, TiAlN, AlCrN), which synergize with its hot hardness properties. --- #### **10. Quality Assurance** * Melted via Electric Arc Furnace (EAF) with secondary refining for optimal cleanliness. * Full traceability and chemical/mechanical certification per EN 10204 3.1/3.2. * Ultrasonic testing available upon request. --- **Disclaimer:** The information provided is typical and for guidance. Optimal heat treatment parameters and performance depend on part geometry and specific application conditions. Consultation with Latrobe's technical service for application engineering is recommended. --- **LATROBE SPECIALTY METALS** *A CRS Holdings, Inc. Company* *Engineered for Demanding Performance* -:- For detailed product information, please contact sales. -: Latrobe HS-105™ ASTM M35 DIN 1.3243 High Speed Steel Specification Dimensions Size： Diameter 20-1000 mm Length <5339 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 HS-105™ ASTM M35 DIN 1.3243 High Speed Steel Properties -:- For detailed product information, please contact sales. -:

Applications of Latrobe HS-105™ ASTM M35 DIN 1.3243 High Speed Steel Foil -:- For detailed product information, please contact sales. -: Chemical Identifiers Latrobe HS-105™ ASTM M35 DIN 1.3243 High Speed Steel Foil -:- For detailed product information, please contact sales. -:

Packing of Latrobe HS-105™ ASTM M35 DIN 1.3243 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 1810 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