Carpenter,Micro-Melt® 9 Tool Steel Rod/Bar

Carpenter Micro-Melt® 9 Annealed Tool Steel Rod Product Information -:- For detailed product information, please contact sales. -: Carpenter Micro-Melt® 9 Annealed Tool Steel Rod Synonyms -:- For detailed product information, please contact sales. -:

Carpenter Micro-Melt® 9 Annealed Tool Steel Product Information -:- For detailed product information, please contact sales. -: ### **Carpenter Micro-Melt® 9 Annealed Tool Steel: Premium Pre-Hardened Tool Steel for Machining** **Product Overview** Carpenter Micro-Melt® 9 Annealed is the supplied condition of the renowned Micro-Melt 9 Tough Treated tool steel. It is an air-hardening, tungsten-molybdenum high-carbon, high-chromium steel manufactured via Carpenter's proprietary powder metallurgy (PM) process. This "Micro-Melt" technique produces an exceptionally fine, uniform, and isotropic carbide structure in the **annealed (soft) state**, which is the optimal condition for machining and fabrication. The material is supplied ready for toolmakers to machine into complex shapes before undergoing final heat treatment to achieve its legendary toughness and wear resistance. **Key Advantages in the Annealed State** * **Superior Machinability:** The fine, uniform PM microstructure eliminates the large, abrasive carbide clusters found in conventional ingot-cast steels (like AISI A8/D2 types), resulting in better chip formation, longer tool life, and improved surface finish during milling, turning, and drilling. * **Excellent Grindability:** Even in the annealed state, the homogeneous structure allows for faster and more predictable grinding operations with reduced risk of burning or cracking. * **Uniform Response to Heat Treatment:** The isotropic nature ensures consistent and predictable transformation during hardening, minimizing distortion and dimensional variation. This allows for more precise "machining to size" before final heat treat. * **Directional Strength & Toughness:** Unlike wrought steels, PM steels like Micro-Melt 9 exhibit identical mechanical properties in all directions (longitudinal, transverse, etc.), crucial for tools with complex geometries or multi-axial stress. * **Predictable Performance:** The tightly controlled PM chemistry and structure provide reliable and repeatable results from batch to batch. **Typical Chemical Composition (%)** As an annealed version of the hardened grade, its composition is identical to the hardened Micro-Melt 9 (CPM 9T). | Element | Carbon (C) | Chromium (Cr) | Molybdenum (Mo) | Tungsten (W) | Vanadium (V) | Silicon (Si) | Manganese (Mn) | | :--- | :---: | :---: | :---: | :---: | :---: | :---: | :---: | | **Content** | 0.50 - 0.60 | 4.75 - 5.25 | 1.30 - 1.80 | 1.30 - 1.80 | 0.90 - 1.10 | 0.15 - 0.40 | 0.20 - 0.50 | **Physical & Mechanical Properties (Annealed Condition)** * **Density:** 7.87 g/cm³ (0.284 lb/in³) * **Hardness:** **200 - 230 HB** (Brinell) / **93 - 100 HRB** (Rockwell B). This is the standard supplied hardness, optimized for machinability. * **Microstructure:** Consists of fine spheroidal carbides uniformly dispersed in a soft ferritic matrix. * **Thermal Conductivity:** Moderate for an alloy steel in this state. * **Machinability Rating:** Significantly better than conventional tool steels of similar alloy content (e.g., standard A8 or D2) due to the absence of massive carbides. Often rated at **65-75%** of that for a 1% carbon steel (AISI 1212). **Heat Treatment (Post-Machining)** *This material requires final heat treatment to achieve its service properties.* * **Preheating:** Essential. Two-stage: 540-650°C (1000-1200°F) followed by 815-870°C (1500-1600°F). * **Austenitizing:** 1010-1065°C (1850-1950°F) in a controlled atmosphere or salt bath. * **Quenching:** Air cool or positive pressure air quench. * **Tempering:** **Mandatory.** Double or triple temper immediately at 540-595°C (1000-1100°F) to achieve final service hardness of **58-62 HRC** and develop its signature high toughness. * **Note:** Always follow Carpenter's latest published heat treatment guidelines for optimal results. **International Standards & Cross-References** * **Carpenter Designation:** Micro-Melt 9 Annealed (precursor to CPM 9T / 9TT). * **UNS:** T30109 (same as the hardened grade). * **AISI:** Modified Type A8 tool steel, produced via powder metallurgy. * **European (EN):** The PM equivalent offers superior properties to conventional 1.2606 (55NiCrMoV7). * **Japanese (JIS):** No direct PM equivalent. Superior to wrought SKD11 (JIS) in toughness and isotropy. **Typical Applications (as a machined precursor)** Micro-Melt 9 Annealed is purchased to fabricate tools that will later be heat treated. Its superior machinability makes it the preferred choice for complex or high-precision components that demand Micro-Melt 9's final performance. 1. **Complex Forming & Punching Dies:** Intricate blanking dies, progressive die components, and forming punches that are difficult to machine in a hardened state. 2. **Precision Molds:** Injection molds or die-casting mold inserts with deep cavities, thin ribs, or complex cooling channels that require extensive machining. 3. **Critical Cutting Tools:** Industrial knife bodies, specialized shear blades, and thread rolling dies where precise pre-hardening geometry is crucial. 4. **Tooling for Aerospace & Automotive:** High-stress jigs, fixtures, and master gauges that require both dimensional stability from the PM process and the final toughness of hardened 9TT. 5. **Prototype & Short-Run Tooling:** Ideal where excellent machinability speeds up development, and the subsequent heat treatment provides robust performance for testing. **Conclusion** Carpenter Micro-Melt® 9 Annealed Tool Steel is not merely a "soft steel," but a technologically advanced, ready-to-machine form of a premium high-toughness tool steel. It provides toolmakers and machinists with a material that offers significantly improved fabricability compared to its conventional counterparts, while guaranteeing a pathway to exceptional final performance. By starting with Micro-Melt 9 Annealed, manufacturers can produce more complex, reliable, and longer-lasting tools with greater efficiency and predictability. -:- For detailed product information, please contact sales. -: Carpenter Micro-Melt® 9 Annealed Tool Steel Specification Dimensions Size： Diameter 20-1000 mm Length <6923 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. -: Carpenter Micro-Melt® 9 Annealed Tool Steel Properties -:- For detailed product information, please contact sales. -:

Applications of Carpenter Micro-Melt® 9 Annealed Tool Steel Rod -:- For detailed product information, please contact sales. -: Chemical Identifiers Carpenter Micro-Melt® 9 Annealed Tool Steel Rod -:- For detailed product information, please contact sales. -:

Packing of Carpenter Micro-Melt® 9 Annealed Tool Steel Rod -:- 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 Rod 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 3394 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