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

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

Carpenter Micro-Melt® 9 Tough Treated Tool Steel Product Information -:- For detailed product information, please contact sales. -: ### **Carpenter Micro-Melt® 9 Tough Treated Tool Steel: Premium High Toughness Tool Steel** **Product Overview** Carpenter Micro-Melt® 9 Tough Treated (often abbreviated as CPM 9T or simply 9TT) is an air-hardening, tungsten-molybdenum high-carbon, high-chromium tool steel produced via the advanced powder metallurgy (PM) process. This proprietary manufacturing method, known as Micro-Melt®, results in a material with a fine, uniform, and isotropic microstructure. The primary design objective of Micro-Melt 9 is to deliver **exceptional toughness and impact resistance** while maintaining good wear resistance and high compressive strength, making it an ideal choice for demanding tooling applications subjected to severe stress. **Key Advantages** * **Superior Toughness:** Offers significantly higher toughness than conventional D2 or similar high-chromium tool steels, reducing the risk of chipping and catastrophic failure. * **Excellent Wear Resistance:** Provides good abrasion resistance suitable for many forming and cutting applications. * **High Compressive Strength:** Withstands high loads without deforming. * **Good Dimensional Stability:** Minimal distortion during heat treatment due to its air-hardening nature. * **Uniform Microstructure:** The PM process ensures consistent performance in all directions, free from the carbide segregation found in ingot-cast steels. * **Improved Machinability & Grindability:** Compared to conventional steels of similar alloy content, the fine carbides enhance machinability in the annealed state and improve grindability in the hardened state. **Typical Chemical Composition (%)** The precise composition is proprietary to Carpenter Technology, but it falls within the following range, aligning with AISI Type A8 tool steel modifications: | 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** * **Density:** 7.87 g/cm³ (0.284 lb/in³) * **Thermal Conductivity:** Relatively low, typical of high-alloy tool steels. * **Coefficient of Thermal Expansion:** ~ 10.8 x 10⁻⁶/°C (20-100°C) * **Hardness (Hardened & Tempered):** Typically used in the range of **58-62 HRC**. The optimal balance of toughness and wear resistance is often achieved at **59-61 HRC**. * **Toughness:** Notably higher than conventional D2 and similar to or better than S7 shock steel at equivalent hardness levels, which is its standout feature. * **Compressive Strength:** Very high, typically > 3,000 MPa (435 ksi) at 60 HRC. **Heat Treatment** * **Annealing:** Furnace cool to 480°C (900°F) at 15°C (25°F) per hour, then air cool. Typical annealed hardness: 200-230 HB. * **Stress Relieving:** 650-675°C (1200-1250°F), then air cool. * **Preheating:** Two-stage preheat is critical: First at 540-650°C (1000-1200°F), then at 815-870°C (1500-1600°F). * **Austenitizing:** 1010-1065°C (1850-1950°F). Soak time depends on section size. * **Quenching:** Air cool or positive pressure air quench. For complex shapes, interrupted quenching in a salt bath at 540-595°C (1000-1100°F) followed by air cooling is recommended. * **Tempering:** **Mandatory.** Double or triple temper immediately after quenching. Temperature range: 540-595°C (1000-1100°F) for 2+ hours per cycle. Hardness will stabilize in the 58-62 HRC range. **International Standards & Cross-References** * **Carpenter Proprietary:** Micro-Melt 9 Tough Treated (CPM 9T). * **UNS:** T30109 * **AISI:** Modified Type A8 (PM version). * **European (EN):** Similar to but outperforms 1.2606 (55NiCrMoV7) in toughness. * **Japanese (JIS):** No direct equivalent; positioned between SKD11 and SKD61 in terms of toughness/wear balance. **Typical Applications** Micro-Melt 9 is specifically chosen for applications where **toughness is the primary concern** but more wear resistance than traditional shock steels (like S7) is required. 1. **Forming & Punching Dies:** * Heavy-duty punching and blanking dies (especially for high-strength materials). * Forming rolls, slitter rings, and wear plates. * Cold forging dies and headers (for non-extreme wear applications). * Thread rolling dies. 2. **Shearing & Cutting Tools:** * Industrial knives for cutting difficult materials (cables, composites, plastics). * Shear blades for metal processing. 3. **Molds & Tooling:** * Injection molds with high shear points or cores prone to breakage. * Dies for casting aluminum and zinc under high pressure. 4. **Other Critical Tools:** * Arbors, mandrels, and master tools. * Chisels and tools for demolition or mining where impact is key. * Machinery components requiring high strength and fatigue resistance. **Conclusion** Carpenter Micro-Melt® 9 Tough Treated Tool Steel represents a significant advancement in tool steel performance, bridging the gap between high-wear and high-toughness grades. Its powder metallurgy pedigree ensures reliability and consistency, making it a premium solution for tooling engineers seeking to extend tool life and prevent unexpected failures in the most challenging applications. When failure by chipping or breakage is the limiting factor, Micro-Melt 9 provides a robust and technologically advanced answer. -:- For detailed product information, please contact sales. -: Carpenter Micro-Melt® 9 Tough Treated Tool Steel Specification Dimensions Size： Diameter 20-1000 mm Length <6922 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 Tough Treated Tool Steel Properties -:- For detailed product information, please contact sales. -:

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

Packing of Carpenter Micro-Melt® 9 Tough Treated 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 3393 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