ATI Allegheny Ludlum M2 Tool Steel Flange, UNS T11302

1,We Manufacturing processes are primarily classified into four types: 1:Forging, 2:Casting, 3:Cutting, 4:Rolling. 2,We can manufacture in accordance with these standards. Standards: GB Series (Chinese Standards), JB Series (Machinery Standards), HG Series (Chemical Industry Standards), ASME B16.5 (American Standards), BS4504 (British Standards), DIN (German Standards), and JIS (Japanese Standards). Internationally, there are two primary systems of pipe flange standards: the European system, represented by the German DIN standards (including those of the former Soviet Union), and the American system, represented by the US ANSI pipe flange standards. Other common standards include: the Chinese Ministry of Machinery Industry standards (JB series), the Ministry of Chemical Industry standards (HG series), the Chinese National Standard *GB/T 9112–9124-2010 Steel Pipe Flanges*, as well as US standards (ASME B16.5), British standards (BS4504), German standards (DIN), Japanese standards (JIS), and marine standards (CBM), among others. The nominal pressure ratings for the PN series are designated by "PN" and comprise the following nine levels: PN2.5, PN6, PN10, PN16, PN25, PN40, PN63, PN100, and PN160. The nominal pressure ratings for the Class series are designated by "Class" and comprise the following six levels: Class150, Class300, Class600, Class900, Class1500, and Class2500. Flange Classification 1. **According to Chemical Industry Standards:** Flanges are classified as follows: Plate Flat Welding Flange (PL), Necked Flat Welding Flange (SO), Necked Butt Welding Flange (WN), Integral Flange (IF), Socket Welding Flange (SW), Threaded Flange (Th), Butt Welding Ring Loose Flange (PJ/SE), Blind Flange (BL), Flat Welding Ring Loose Flange (PJ/PJ), and Lined Blind Flange (BL(s)). 2. **According to Petrochemical (SH) Industry Standards:** Flanges are classified as follows: Threaded Flange (PL), Butt Welding Flange (WN), Flat Welding Flange (SO), Socket Welding Flange (SW), Loose Flange (LJ), and Blind Flange (no specific designation). 3. **According to Machinery (JB) Industry Standards:** Flanges are classified as follows: Integral Flange, Butt Welding Flange, Plate Flat Welding Flange, Butt Welding Ring Plate Loose Flange, Flat Welding Ring Plate Loose Flange, Lap Joint Ring Plate Loose Flange, and Blind Flange. 4. **According to Connection Method/Type:** Flanges are classified as follows: Plate Flat Welding Flange, Necked Flat Welding Flange, Necked Butt Welding Flange, Socket Welding Flange, Threaded Flange, Blind Flange, Necked Butt Welding Ring Loose Flange, Flat Welding Ring Loose Flange, Ring-Type Joint (RTJ) Flange and Blind Flange, Large-Diameter Plate Flange, Large-Diameter High-Neck Flange, Figure-8 Blind Plate, Butt Welding Ring Loose Flange, etc. 5. **According to the Component Being Connected:** Flanges can be classified into Vessel Flanges and Pipe Flanges. 6. **According to Structural Type:** Flanges include Integral Flanges, Threaded Flanges, Flat Welding Flanges, Butt Welding Flanges, Lap Joint (Loose/Swivel) Flanges, and Blind Flanges. A flange—also referred to as a flange plate or rim—is a component used to connect shafts to one another, or, more commonly, to join the ends of pipes. Flanges are also utilized at the inlet and outlet ports of equipment to facilitate connections between two devices—for instance, the flange on a speed reducer. A "flange connection" or "flanged joint" refers to a detachable joint assembly comprising three interconnected elements—a flange, a gasket, and bolts—that together form a sealed structural unit. In the context of piping systems, a "pipe flange" specifically denotes a flange used for plumbing within the installation; when applied to equipment, it refers to the inlet or outlet flange of that specific device. Flanges feature a series of holes through which bolts are inserted to securely fasten the two flanges together, while a gasket placed between the flanges ensures a leak-proof seal. Flanges are broadly categorized into three types: threaded (screw-in) flanges, welded flanges, and clamp-type flanges. Flanges are invariably used in pairs; threaded flanges are suitable for low-pressure piping applications, whereas welded flanges are required for systems operating at pressures exceeding 4 kilograms per square centimeter. A sealing gasket is inserted between the two flange plates, which are then firmly secured using bolts. The thickness of a flange—as well as the specifications of the bolts used to fasten it—vary depending on the specific pressure rating required for the application. When connecting equipment such as water pumps or valves to piping systems, the corresponding connection points on these devices are often manufactured in the shape of a matching flange; this method of attachment is also referred to as a "flange connection." Generally, any connecting component that utilizes bolts to join and seal the perimeters of two flat surfaces—such as the joints in ventilation ducts—is termed a "flange"; such components may collectively be classified as "flange-type parts." However, since such a connection often constitutes merely a *portion* of a larger device—for instance, the interface between a flange and a water pump—it would be inappropriate to classify the entire water pump itself as a "flange-type part." Conversely, smaller components—such as valves—that feature such flanged interfaces may indeed be appropriately categorized as "flange-type parts." -:- For detailed product information, please contact sales. -: ATI Allegheny Ludlum M2 Tool Steel Flange, UNS T11302 Product Information -:- For detailed product information, please contact sales. -: ATI Allegheny Ludlum M2 Tool Steel Flange, UNS T11302 Synonyms -:- For detailed product information, please contact sales. -:

ATI Allegheny Ludlum M2 Tool Steel, UNS T11302 Product Information -:- For detailed product information, please contact sales. -: # **Product Introduction: ATI Allegheny Ludlum M2 Tool Steel (UNS T11302)** ## **1. Overview** **ATI Allegheny Ludlum M2 Tool Steel** is a high-performance **molybdenum-tungsten high-speed steel (HSS)** that serves as the global benchmark for cutting tool applications requiring exceptional **hot hardness (red hardness), wear resistance, and toughness**. Designated as **UNS T11302** and commonly known as **AISI M2**, this alloy revolutionized metalworking by maintaining cutting hardness at temperatures where conventional tool steels soften dramatically. Characterized by its balanced **tungsten-molybdenum-vanadium-carbon matrix**, M2 delivers superior performance in machining operations involving high speeds, heavy feeds, and abrasive materials. ATI's manufacturing ensures consistent carbide distribution and fine grain structure, making it the most widely used high-speed steel for industrial cutting tools worldwide. ## **2. International Standards & Specifications** M2 is the most recognized and standardized high-speed steel grade across all industrial regions. * **Primary Standard Designations:** * **UNS T11302:** Unified Numbering System designation. * **AISI M2:** American Iron and Steel Institute classification (the universal identifier). * **ASTM A600:** Standard Specification for Tool Steel High Speed. * **Key International Equivalents:** * **DIN 1.3343 / EN ISO 4957 HS6-5-2:** The primary European standard (6% W, 5% Mo, 2% V system). * **JIS G4403 SKH51:** Japanese Industrial Standard. * **GB/T 9943 W6Mo5Cr4V2:** Chinese national standard. * **ISO 4957:** **HS6-5-2**. * **Common Trade Names:** Universally known as **M2 High-Speed Steel**, **HSS M2**, or simply **M2**. ## **3. Chemical Composition (Weight %, per ASTM A600)** The composition is optimized for a balance of hot hardness, wear resistance, and toughness through multiple carbide-forming elements. | Element | Composition Range (%) | Role & Benefit | |---------|----------------------|----------------| | **Carbon (C)** | 0.78 – 0.88 | Critical for forming hard carbides with alloying elements and achieving high martensite hardness. Balanced to avoid excessive brittleness. | | **Tungsten (W)** | 5.50 – 6.75 | **Primary hot hardness element.** Forms stable tungsten carbides that resist coarsening at high temperatures, enabling the steel to retain hardness during high-speed cutting (red hardness). | | **Molybdenum (Mo)** | 4.50 – 5.50 | **Primary hardenability and toughness element.** Provides similar hot hardness benefits as tungsten (at about 1% Mo ≈ 1.6-2% W) but improves toughness and reduces carbide segregation. Makes the steel more responsive to heat treatment. | | **Chromium (Cr)** | 3.75 – 4.50 | Provides hardenability, contributes to wear resistance through carbide formation, and improves oxidation resistance at elevated temperatures. | | **Vanadium (V)** | 1.75 – 2.20 | **Critical for wear resistance.** Forms extremely hard vanadium carbides (VC) that provide exceptional abrasion resistance. Higher vanadium improves wear but reduces grindability. | | **Cobalt (Co)** | 0.25 max (Standard M2) | Typically a residual element in standard M2. Cobalt is added in M35/M42 grades specifically to increase hot hardness. | ## **4. Typical Physical & Mechanical Properties (Properly Heat Treated)** * **Essential Heat Treatment (Complex and Critical):** * **Preheating:** **Mandatory multi-stage:** ~450°C (840°F), then ~850°C (1560°F) to prevent thermal shock. * **Austenitizing:** **1190-1220°C (2175-2230°F).** Extremely precise temperature control is required. Salt baths or vacuum furnaces are standard. * **Quenching:** **Oil quench or salt bath quench.** Some grades can be air quenched in thin sections. * **Tempering:** **Triple tempering is mandatory.** Temper immediately after quenching to ~50-70°C (120-160°F). Typical tempering: **540-570°C (1000-1060°F)** for 2+ hours each cycle. This develops **secondary hardening**, achieving peak hardness. * **Mechanical Properties (Hardened & Triple Tempered):** * **Hardness:** **63 – 66 HRC** (typical achievable range, often specified at 64-65 HRC). * **Hot Hardness (Red Hardness):** **Excellent.** Can retain ~60 HRC at temperatures exceeding **600°C (1112°F)**, enabling high-speed machining. * **Compressive Strength:** Extremely high (>3000 MPa). * **Bending Strength/Transverse Rupture Strength:** Good for its hardness level, but lower than toughness-optimized cold work steels. * **Impact Toughness:** Moderate. The high alloy and carbide content prioritize hardness and wear over impact resistance. * **Wear Resistance:** **Exceptional,** particularly against abrasion, due to the high volume of hard tungsten, molybdenum, and vanadium carbides. * **Key Performance Features:** * **Grindability:** **Poor to Fair.** The hard vanadium carbides are extremely abrasive to grinding wheels. Requires appropriate (aluminum oxide or CBN) wheels and techniques. * **Machinability (Annealed):** **Fair.** More difficult than most tool steels due to high alloy content. * **Physical Properties:** * **Density:** ~8.16 g/cm³ * **Thermal Conductivity:** Low (~20 W/m·K at 20°C). * **Coefficient of Thermal Expansion:** ~11.5 × 10⁻⁶/°C ## **5. Product Application** ATI M2 Tool Steel is the workhorse material for a vast array of metal-cutting tools operating at high speeds and under significant thermal stress. * **Metal Cutting Tools:** * **Drills, taps, reamers, end mills, and milling cutters** for machining steels, cast iron, and non-ferrous alloys. * **Gear hobs, broaches, and shaper cutters.** * **Lathe tool bits and single-point cutting tools.** * **Saw Blades and Cutting Inserts:** * **Hacksaw blades, band saw blades, and hole saws.** * **Indexable inserts** for certain applications (though largely superseded by carbides for most insert use). * **Forming and Shearing Tools:** * **Cold heading dies, punches, and thread rolling dies** for high-volume production. * **Shear blades and slitters** for abrasive materials. * **Woodworking Tools:** High-performance planer blades and router bits. ## **6. Key Features & Advantages** * **Superior Hot Hardness (Red Hardness):** Its defining characteristic. Allows tools to maintain a sharp cutting edge at the high temperatures generated during high-speed machining, where carbon and low-alloy tool steels would fail. * **Exceptional Wear Resistance:** The combination of tungsten, molybdenum, and vanadium carbides provides outstanding resistance to abrasive and adhesive wear, extending tool life. * **Good Combination of Hardness and Toughness:** Offers a better toughness-to-hardness ratio than many other high-speed steels (e.g., M42), making it more resistant to chipping in interrupted cuts. * **Cost-Effective High-Performance:** Provides an excellent balance of performance and cost, making it the most economical choice for a wide range of demanding cutting applications. * **Well-Established Heat Treatment Protocols:** Decades of use have resulted in highly refined and reliable hardening procedures. ## **7. Processing Guidelines** * **Heat Treatment:** **Requires specialized expertise and equipment.** Must be performed in salt baths or vacuum furnaces with precise temperature control. **Triple tempering is non-negotiable.** Inadequate tempering leads to retained austenite and premature failure. * **Machining:** Perform all machining in the soft-annealed condition. Use rigid setups and carbide tooling. * **Grinding:** **The major challenge.** Use soft-grade, aluminum oxide wheels (32A-60H) or CBN wheels. Use light passes, sharp wheels, and ample coolant to avoid grinding burns and cracks. * **Surface Treatment:** Often coated with **PVD (TiN, TiAlN, TiCN)** or **CVD** coatings to further enhance lubricity, wear resistance, and thermal barriers, pushing performance beyond the base material limits. **Summary:** ATI Allegheny Ludlum M2 Tool Steel represents the foundational pillar of high-speed steel technology. Its ingeniously balanced composition of tungsten and molybdenum delivers the quintessential properties required for modern metal cutting: the ability to stay hard when hot, resist wear aggressively, and withstand the rigors of production. While premium cobalt grades (M35, M42) offer higher hot hardness and powder metallurgy (PM) grades offer better grindability and consistency, standard M2 remains the most widely used and economically viable high-speed steel for the majority of industrial cutting tools. It is the material that enabled the productivity leaps of the 20th-century machine shop and continues to be indispensable in today's manufacturing landscape. -:- For detailed product information, please contact sales. -: ATI Allegheny Ludlum M2 Tool Steel, UNS T11302 Specification Dimensions Size： Diameter 20-1000 mm Length <7058 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 M2 Tool Steel, UNS T11302 Properties -:- For detailed product information, please contact sales. -:

Applications of ATI Allegheny Ludlum M2 Tool Steel Flange, UNS T11302 -:- For detailed product information, please contact sales. -: Chemical Identifiers ATI Allegheny Ludlum M2 Tool Steel Flange, UNS T11302 -:- For detailed product information, please contact sales. -:

Packing of ATI Allegheny Ludlum M2 Tool Steel Flange, UNS T11302 -:- 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 Flange 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 3529 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