ATI Allegheny Ludlum 06 Tool Steel Sheet,Plate, UNS T31506

ATI Allegheny Ludlum 06 Tool Steel Sheet/Plate, UNS T31506 Product Information -:- For detailed product information, please contact sales. -: ATI Allegheny Ludlum 06 Tool Steel Sheet/Plate, UNS T31506 Synonyms -:- For detailed product information, please contact sales. -:

ATI Allegheny Ludlum 06 Tool Steel, UNS T31506 Product Information -:- For detailed product information, please contact sales. -: # **Product Introduction: ATI Allegheny Ludlum 06 Tool Steel (UNS T31506)** ## **1. Overview** **ATI Allegheny Ludlum 06 Tool Steel** is a specialized **oil-hardening, low-alloy cold work tool steel** distinguished by its exceptionally high carbon content and simplified alloy composition. Designated as **UNS T31506** and commonly known as **AISI O6**, this grade is unique for its **graphitic microstructure** in the annealed condition, which confers outstanding **machinability and anti-galling properties**. Primarily composed of iron, carbon, silicon, and manganese with minimal other alloying elements, O6 is engineered for applications requiring excellent wear resistance, good dimensional stability during heat treatment, and superior performance in sliding or forming operations where material pickup (galling) is a concern. Its combination of easy machinability and good post-hardening wear characteristics makes it a valuable material for specific tooling applications. ## **2. International Standards & Specifications** This material is a standardized grade with clear international designations, though it is less common than O1 or A2. * **Primary Standard Designations:** * **UNS T31506:** Unified Numbering System designation. * **AISI O6:** American Iron and Steel Institute classification. * **ASTM A681:** Standard Specification for Tool Steels Alloy. * **Key International Equivalents:** * **DIN 1.2512:** The primary European equivalent (though not a perfect 1:1 match). * **JIS G4404:** No direct equivalent; it falls between SKS and SK families. * **ISO 4957:** Classified under graphitic tool steel types. * **Common Trade Names:** Often referred to as **O6 Tool Steel** or **Graphitic Oil-Hardening Steel**. ## **3. Chemical Composition (Weight %, per ASTM A681)** The composition is characterized by very high carbon and silicon, with low levels of other alloying elements. | Element | Composition Range (%) | Role & Benefit | |---------|----------------------|----------------| | **Carbon (C)** | 1.25 – 1.55 | **Extremely high.** Provides the matrix for high hardness and forms free graphite in the annealed state. This is the source of its unique machinability and anti-galling properties. | | **Manganese (Mn)** | 0.30 – 1.10 | Aids in hardenability and works with sulfur. | | **Silicon (Si)** | 0.55 – 1.50 | **Key element.** Promotes the formation of **free graphite** during annealing, which acts as a solid lubricant in the microstructure. Also a potent deoxidizer and strengthens ferrite. | | **Molybdenum (Mo)** | 0.20 – 0.30 | Enhances hardenability and tempering resistance. | | **Other Elements:** Typically contains **0.04-0.12% Lead (Pb)** in standard grades to further improve machinability. | | **Note:** Chromium, tungsten, and vanadium—common in other O-series steels—are **not** significant alloying elements in O6. ## **4. Typical Physical & Mechanical Properties (Heat Treated)** * **Microstructural Feature (Annealed):** Contains **spheroidized cementite and free graphite particles**, giving it a dark, sooty appearance when machined. * **Recommended Heat Treatment:** * **Preheating:** 650-700°C (1200-1290°F). * **Austenitizing:** **790-815°C (1455-1500°F).** A narrow range; overheating must be avoided. * **Quenching:** **Quench in oil.** The oil quench is relatively forgiving. * **Tempering:** **Temper immediately after quenching.** Typical range: **150-205°C (300-400°F)** for maximum hardness. Higher tempering (205-315°C) is used for tools requiring some toughness. * **Mechanical Properties (Hardened & Tempered @ 175°C):** * **Hardness:** **57 – 62 HRC** (achievable, typically used at ~59-61 HRC). Slightly lower maximum hardness than O1 due to graphitic structure. * **Tensile Strength:** 1800 – 2000 MPa (261,000 – 290,000 psi) * **Compressive Strength:** High. * **Impact Toughness:** **Moderate to Low.** The high carbon content and graphite particles can reduce toughness compared to O1. It is selected for wear, not high-impact applications. * **Dimensional Change:** Very good stability during oil quenching. * **Key Performance Features:** * **Machinability (Annealed):** **Excellent.** Rated among the best of all tool steels due to its graphitic structure and possible lead addition. Allows for high-speed machining with excellent surface finish. * **Anti-Galling & Seizure Resistance:** **Excellent.** The graphite particles act as a built-in solid lubricant, making it ideal for tools in sliding contact (e.g., forming dies, rolls) where material pickup is a problem. * **Wear Resistance:** **Good.** High carbon martensite provides good abrasion resistance, though less than high-chromium steels (D2). The graphite can reduce adhesive wear. * **Physical Properties:** * **Density:** ~7.76 g/cm³ (slightly lower due to graphite) * **Thermal Conductivity:** Moderate. ## **5. Product Application** ATI O6 Tool Steel is specialized for applications where its unique combination of machinability and anti-galling properties are paramount. * **Forming, Drawing & Extrusion Tools:** * **Knurls, forming rolls, and swaging dies** where resistance to metal pickup is critical. * **Thread rolling dies** for softer materials. * **Deep drawing dies and punches** for non-ferrous metals. * **Cutting Tools for Abrasive Non-Metallics:** * **Cutting blades and slitters** for paper, cardboard, plastics, and rubber. * **Woodworking tools** like planer blades. * **Gauges & Wear Parts:** * **Plug gauges, thread gauges, and wear plates** in sliding applications. * **Specialized Machine Components:** * **Cams, guides, and bushings** where low friction and good wear are needed. ## **6. Key Features & Advantages** * **Superior Machinability:** One of the most easily machined tool steels, reducing fabrication time and cost for complex tools. * **Excellent Anti-Galling Properties:** The free graphite provides inherent lubrication, preventing welding or seizing between the tool and workpiece—a key advantage over non-graphitic steels. * **Good Wear Resistance:** Suitable for many abrasive and sliding wear applications. * **Simple Heat Treatment:** Oil quenching process is straightforward and results in minimal distortion. * **Good Dimensional Stability:** Predictable size change during hardening. * **Good Through-Hardening:** Capable of hardening in moderate sections. ## **7. Processing Guidelines** * **Machining:** **Exploit its excellent machinability.** Use sharp high-speed steel or carbide tools. Expect a dark, graphite-rich swarf. * **Grinding:** Can be challenging. The graphite can "smear" and clog grinding wheels. Use open-structure wheels and lighter cuts. * **Heat Treatment:** Control austenitizing temperature carefully. Overheating degrades properties. **Temper immediately.** * **Finishing:** For best surface finish in hardened state, consider honing or lapping as grinding may not be optimal. * **Note:** The leaded version (standard) requires appropriate safety handling during machining (e.g., dust extraction). **Summary:** ATI Allegheny Ludlum 06 (O6) Tool Steel is a specialized material defined by its high carbon and silicon content, which creates a unique graphitic microstructure. This structure is the source of its greatest strengths: exceptional machinability and outstanding resistance to galling. While it does not reach the ultimate hardness or toughness of some other cold work steels, it excels in specific applications where these properties solve critical problems, such as metal pickup on forming dies or the need to machine intricate tool shapes efficiently. For tooling involving sliding contact, forming of softer metals, or cutting of abrasive non-metallics, O6 offers a proven and effective solution that balances performance with manufacturability. -:- For detailed product information, please contact sales. -: ATI Allegheny Ludlum 06 Tool Steel, UNS T31506 Specification Dimensions Size： Diameter 20-1000 mm Length <7051 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. -: ATI Allegheny Ludlum 06 Tool Steel, UNS T31506 Properties -:- For detailed product information, please contact sales. -:

Applications of ATI Allegheny Ludlum 06 Tool Steel Sheet,Plate, UNS T31506 -:- For detailed product information, please contact sales. -: Chemical Identifiers ATI Allegheny Ludlum 06 Tool Steel Sheet,Plate, UNS T31506 -:- For detailed product information, please contact sales. -:

Packing of ATI Allegheny Ludlum 06 Tool Steel Sheet/Plate, UNS T31506 -:- 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 Sheet/Plate 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 3522 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