AISI Type T5 Tungsten-Alloy High-Speed-Tool Steel Flange (UNS T12005)

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. -: AISI Type T5 Tungsten-Alloy High-Speed-Tool Steel Flange (UNS T12005) Product Information -:- For detailed product information, please contact sales. -: AISI Type T5 Tungsten-Alloy High-Speed-Tool Steel Flange (UNS T12005) Synonyms -:- For detailed product information, please contact sales. -:

AISI Type T5 Tungsten-Alloy High-Speed-Tool Steel (UNS T12005) Product Information -:- For detailed product information, please contact sales. -: # **Product Introduction: AISI Type T5 Tungsten-Alloy High-Speed Tool Steel (UNS T12005)** ## **Overview** **AISI T5 (UNS T12005)** is a **high-cobalt, tungsten-based super high-speed steel (HSS)** engineered to deliver **exceptional red-hardness and cutting performance under extreme thermal conditions**. As part of the premium T-series, T5 builds upon the T4 foundation with a **substantially increased cobalt content (7.0-9.5%)**, pushing its ability to maintain hardness and edge integrity at very high temperatures to a superior level. It is designed for the most demanding high-speed machining applications involving hard, abrasive, and high-temperature alloys where tool life is limited by thermal softening. ## **1. Chemical Composition (Nominal %)** T5's composition is optimized for maximum hot hardness through a high cobalt and balanced carbide system. | Element | Content (%) | Primary Function | |---------|------------|------------------| | **Carbon (C)** | 0.75 - 0.85 | Provides matrix hardness and supports carbide formation. Slightly higher than T4 to maintain balance. | | **Tungsten (W)** | 17.50 - 19.00 | **Primary element.** Forms the foundational network of stable tungsten carbides for red-hardness and hot strength. | | **Chromium (Cr)** | 3.75 - 4.50 | Ensures hardenability and provides oxidation resistance. | | **Vanadium (V)** | 1.50 - 2.00 | **Higher than T4.** Forms hard vanadium carbides (VC) for improved wear resistance, compensating for increased cobalt's potential toughness reduction. | | **Cobalt (Co)** | **7.00 - 9.50** | **Defining element.** High cobalt content dramatically elevates red-hardness, tempering resistance, and hot hardness through potent solid solution strengthening of the matrix. | | **Molybdenum (Mo)** | ≤ 0.50 (Residual) | Not a primary alloying element. | | **Iron (Fe)** | Balance | Base metal. | **Key Chemistry Note:** T5 can be thought of as **"T1 with Very High Cobalt and Enhanced Vanadium"**. The **cobalt content (7-9.5%) is its core feature**, providing a significant step up in high-temperature performance from T4 (4.5% Co). The **increased vanadium (up to 2%)** relative to T1/T4 is crucial; it boosts wear resistance to match the enhanced thermal capabilities, ensuring the hard matrix is protected by adequate abrasion-resistant carbides. This composition aims for a supreme balance of heat resistance and wear life. ## **2. Physical & Mechanical Properties** | Property | Typical Value / Condition | |----------|--------------------------| | **Density** | ~8.80 g/cm³ (Very high due to W and Co) | | **Melting Point** | ~1415°C (2580°F) | | **Thermal Conductivity** | Low (~23 W/m·K) | | **Coefficient of Thermal Expansion** | ~10.5 × 10⁻⁶/K (20-600°C) | | **Modulus of Elasticity** | ~215 GPa (31.2 × 10⁶ psi) | | **Annealed Hardness** | 255-302 HB | | **Hardened & Tempered Hardness** | **65-67 HRC** (Can achieve and maintain very high hardness). | | **Red Hardness** | **Outstanding.** One of the highest among traditional T-series grades. Maintains cutting edge hardness effectively at temperatures exceeding **620°C (1150°F)**. | | **Abrasion Resistance** | **Very Good.** Enhanced by the higher vanadium content compared to T4. | | **Toughness** | **Moderate to Low.** The high cobalt content significantly reduces impact resistance. T5 requires very stable, shock-free machining conditions to avoid chipping. | | **Tempering Temperature** | 540-600°C (1000-1110°F), **triple tempering is absolutely mandatory**. | | **Grindability** | **Very Poor** (~25-30% relative to M2). The combination of hard carbides and a cobalt-hardened matrix makes grinding difficult. | ## **3. International Standards & Cross-References** | Standard | Designation | |----------|------------| | **UNS** | T12005 | | **AISI/ASTM (USA)** | T5 (ASTM A600) | | **ISO (International)** | **HS 18-1-2-10** (ISO 4957: Tool steels) | | **DIN (Germany)** | **1.3265** | | **JIS (Japan)** | **SKH4A** (or similar high-cobalt variant) | | **GB (China)** | **W18Cr4VCo8** (Reflecting the ~8% cobalt content) | | **Common Name** | **8% Cobalt Tungsten Super High-Speed Steel** | ## **4. Product Applications** T5 is reserved for severe-duty, high-speed machining operations where cutting edges experience extreme temperatures and thermal fatigue is a primary failure mode. **Primary Applications:** * **High-Speed Machining of Superalloys and High-Temperature Alloys:** * **Nickel-based superalloys** (e.g., Inconel, Waspaloy) and **cobalt-based alloys**. * **High-speed turning and milling of hardened steels** (45-55 HRC). * **Heavy-Duty Cutting Tools under High Thermal Load:** * **Single-point lathe tools and planer tools** for aggressive, high-speed cuts on tough materials. * **End mills and slot drills** for machining aerospace components. * **Gear hobs and broaches** for high-production machining of tough materials. * **Tools for Interrupted Cuts on Hard Materials** where each cut subjects the edge to a thermal shock cycle. **Application Rationale:** T5 is selected when **T4 or M35 prove insufficient in maintaining edge hardness**, and the operation justifies the higher cost and lower toughness. It is often compared to **M42 (Co8%)**, which offers similar red-hardness benefits. The choice between T5 and M42 often comes down to tradition, specific application history, or availability, though M42 generally has better grindability. ## **5. Processing & Heat Treatment Guidelines** Heat treatment of T5 is critical and demands precision to harness its high alloy content. * **Forging:** Heat slowly to **1100-1140°C (2010-2085°F)**. Do not forge below **950°C (1740°F)**. Cool very slowly in insulating material. * **Annealing:** Heat to **870-900°C (1600-1650°F)**, hold, then furnace cool very slowly to **500°C (930°F)**. * **Hardening (Austenitizing):** 1. **Preheating is essential:** Two-stage preheat (550-650°C then 800-850°C) is required to prevent cracking. 2. **Austenitize:** **1270-1290°C (2320-2355°F).** Strict temperature control is vital. 3. **Quench:** In salt bath, oil, or preferably in a vacuum furnace with high-pressure gas (N₂/Ar) quenching for optimal results. * **Tempering:** * **Temper immediately** after reaching hand-warm temperature. * Temper at **540-560°C (1005-1040°F)** for 2+ hours per cycle. * **Triple tempering is non-negotiable.** A fourth temper may be beneficial for maximum dimensional stability. * **Cryogenic treatment** between tempers is highly recommended to transform retained austenite and maximize final hardness. ## **6. Comparative Position** * **vs. T4:** T5 offers **significantly higher red-hardness and hot wear performance** due to its doubled cobalt content, suitable for more extreme conditions. * **vs. M42 (Co8%):** These are **direct functional competitors**. M42, being molybdenum-based, typically offers **better grindability and slightly better toughness** at equivalent hardness, and is more commonly used today. T5 represents the tungsten-based approach to the same high-cobalt performance tier. * **vs. T15:** T15 has slightly lower cobalt but much higher carbon and vanadium. **T15 excels in pure abrasion resistance**, while **T5 may have a slight edge in pure hot hardness**. T15 is generally considered a more advanced and balanced super HSS. **Conclusion:** AISI T5 is a high-performance, high-cobalt tungsten HSS representing a traditional solution for extreme thermal machining challenges. While its use has been largely supplanted by the more user-friendly M42 in many industries, it remains a standardized grade with a proven track record in specific, severe applications. Its selection is justified when maximum high-temperature edge holding is required from a tungsten HSS, and the application can accommodate its brittleness and grinding difficulty. --- **Disclaimer:** T5 is a premium, expensive, and processing-sensitive material. Its successful application requires rigid machine tools, secure workpiece clamping, and optimal cutting parameters to mitigate its low toughness. The grinding process demands diamond or CBN wheels and expert technique to avoid burns and micro-cracks. Economic justification should be based on demonstrated productivity gains over lower-grade HSS in specific high-heat applications. Always follow the material producer's specific heat treatment protocols. -:- For detailed product information, please contact sales. -: AISI Type T5 Tungsten-Alloy High-Speed-Tool Steel (UNS T12005) Specification Dimensions Size： Diameter 20-1000 mm Length <6770 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. -: AISI Type T5 Tungsten-Alloy High-Speed-Tool Steel (UNS T12005) Properties -:- For detailed product information, please contact sales. -:

Applications of AISI Type T5 Tungsten-Alloy High-Speed-Tool Steel Flange (UNS T12005) -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI Type T5 Tungsten-Alloy High-Speed-Tool Steel Flange (UNS T12005) -:- For detailed product information, please contact sales. -:

Packing of AISI Type T5 Tungsten-Alloy High-Speed-Tool Steel Flange (UNS T12005) -:- 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 3241 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