1.3243 / HS6-5-2-5 / Р6М5К5 / Cobalt High-Speed Steel (M35)

Sheet Steel 1.3243 / R6M5K5

📌 Overview and Technical Specifications

Sheet steel 1.3243 / R6M5K5 is a high-speed tool steel with a high content of tungsten, molybdenum, cobalt, and vanadium. It features high hardness, heat resistance, and wear resistance, making it ideal for cutting tools and high-load components.

🛠 Specifications:

• Hardness: 250–280 HB (annealed), up to 67 HRC (hardened)
• Thickness: from 1 mm to 50 mm
• Yield strength: 1200–1400 MPa
• Tensile strength: 1800–2100 MPa
• Elongation: 5–8%

🧪 Chemical Composition

• Carbon (C): 0.85 – 0.95%
• Silicon (Si): 0.20 – 0.50%
• Manganese (Mn): 0.15 – 0.45%
• Chromium (Cr): 3.80 – 4.50%
• Tungsten (W): 5.50 – 6.50%
• Molybdenum (Mo): 4.50 – 5.50%
• Vanadium (V): 1.50 – 2.00%
• Cobalt (Co): 4.50 – 5.50%
• Phosphorus (P): ≤0.030%
• Sulfur (S): ≤0.030%

⚙ Applications

Steel 1.3243 / R6M5K5 is widely used in the following industries:

• 🔪 Manufacturing of high-performance cutting tools (milling cutters, drills, taps)
• 🏗 Tools for machining heat-resistant and hardened steels
• 🛠 Production of dies and molds for metal forming
• 🚜 High-load components operating in extreme conditions

🌟 Features

• ✅ High hardness and wear resistance
• ✅ Excellent heat resistance at high temperatures
• ✅ Dimensional stability after heat treatment
• ✅ Enhanced strength due to cobalt and tungsten content

Sheet steel delivery forms 1.3243 / Р6М5К5 / HS6-5-2-5