AISI Type T1 Tungsten-Alloy High-Speed-Tool Steel Flange (UNS T12001)

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 T1 Tungsten-Alloy High-Speed-Tool Steel Flange (UNS T12001) Product Information -:- For detailed product information, please contact sales. -: AISI Type T1 Tungsten-Alloy High-Speed-Tool Steel Flange (UNS T12001) Synonyms -:- For detailed product information, please contact sales. -:

AISI Type T1 Tungsten-Alloy High-Speed-Tool Steel (UNS T12001) Product Information -:- For detailed product information, please contact sales. -: # **Product Introduction: AISI Type T1 Tungsten-Alloy High-Speed Tool Steel (UNS T12001)** ## **Overview** **AISI T1 (UNS T12001)**, also known as **18-4-1 steel**, is the **original and archetypal tungsten-based high-speed steel (HSS)**. Patented in the early 20th century, it revolutionized metalworking by enabling tools to cut at high speeds while retaining their hardness even when the cutting edge became red-hot—a property known as **red-hardness**. As the foundation of the entire T-series, T1 is characterized by its classic composition of **18% Tungsten, 4% Chromium, and 1% Vanadium**. While largely supplanted by more balanced molybdenum-based (M-series) grades for general use, T1 remains a benchmark for high-temperature hardness and wear resistance, and is still used in specialized applications. ## **1. Chemical Composition (Nominal %)** T1's composition represents the historic formula that defined high-speed steel. | Element | Content (%) | Primary Function | |---------|------------|------------------| | **Carbon (C)** | 0.65 - 0.80 | Provides matrix hardness and combines with other elements to form hard carbides essential for wear resistance. | | **Tungsten (W)** | 17.25 - 18.75 | **Dominant element.** Provides exceptional red-hardness and hot strength by forming stable, hard tungsten carbides (e.g., Fe₄W₂C, WC) that resist coarsening at high temperatures. | | **Chromium (Cr)** | 3.75 - 4.50 | Enhances hardenability, provides oxidation resistance, and forms chromium carbides for additional wear resistance. | | **Vanadium (V)** | 0.90 - 1.30 | **Critical element.** Forms extremely hard and wear-resistant vanadium carbides (VC). Refines grain size and improves toughness. | | **Molybdenum (Mo)** | ≤ 0.50 (Residual) | Not an intentional primary alloy; may be present in trace amounts. | | **Cobalt (Co)** | Not specified | The base T1 grade does not contain cobalt. Cobalt-bearing variants (like T4, T5, T6, T15) were developed later. | | **Iron (Fe)** | Balance | Base metal. | **Key Chemistry Note:** The **"18-4-1" (W-Cr-V) formula** is the hallmark of T1. Its very **high tungsten content** is its defining feature, providing supreme resistance to softening at elevated temperatures. However, this also leads to **dense, coarse carbide networks** that can negatively impact grindability and toughness compared to more modern, refined M-series steels. The moderate carbon content is sufficient to support the carbide structure without excessive brittleness. ## **2. Physical & Mechanical Properties** | Property | Typical Value / Condition | |----------|--------------------------| | **Density** | ~8.67 g/cm³ (High, due to dense tungsten) | | **Melting Point** | ~1430°C (2610°F) | | **Thermal Conductivity** | Low (~25 W/m·K at 20°C) | | **Coefficient of Thermal Expansion** | ~10.5 × 10⁻⁶/K (20-600°C) | | **Modulus of Elasticity** | ~215 GPa (31.2 × 10⁶ psi) | | **Annealed Hardness** | 235-277 HB | | **Hardened & Tempered Hardness** | **63-66 HRC** (Standard working range). | | **Red Hardness** | **Excellent.** Maintains high hardness up to **~600°C (1110°F)**. The benchmark property for which it was created. | | **Abrasion Resistance** | **Very Good to Excellent,** due to vanadium and tungsten carbides. | | **Toughness** | **Fair to Moderate.** The coarse carbide structure and high alloy content reduce impact resistance compared to more balanced HSS grades like M2. | | **Tempering Temperature** | 540-600°C (1000-1110°F), **triple tempering is essential**. | | **Grindability** | **Poor** (~30-40% relative to M2). The hard vanadium and tungsten carbides are extremely abrasive to grinding wheels. | ## **3. International Standards & Cross-References** T1 is a historically significant grade with well-defined equivalents. | Standard | Designation | |----------|------------| | **UNS** | T12001 | | **AISI/ASTM (USA)** | T1 (ASTM A600) | | **ISO (International)** | **HS 18-0-1** (ISO 4957: Tool steels) | | **DIN (Germany)** | **1.3355** | | **JIS (Japan)** | **SKH2** | | **GB (China)** | **W18Cr4V** (The classic Chinese designation, widely used) | | **AFNOR (France)** | **HS 18-0-1** | | **Common Name** | **18-4-1 High-Speed Steel, Tungsten HSS** | ## **4. Product Applications** T1 is used for applications that leverage its exceptional red-hardness, often where cutting temperatures are very high. **Primary Applications:** * **Single-Point Cutting Tools:** **Lathe tools, planer tools, and shaping tools** for heavy-duty, high-speed turning of steels and cast irons, especially in traditional settings. * **Complex Form Tools:** **Broaches, gear hobs, and milling cutters** for machining high-strength alloys, where its ability to hold a precise form at temperature is valued. * **Specialty Drills and Reamers:** For deep-hole drilling or machining abrasive materials where hot hardness is critical. * **Hot Work Tooling (Limited):** **Hot punches, extrusion dies, and shear blades** for high-temperature metal forming (though dedicated hot-work steels like H13 are often preferred). * **Knives for High-Temperature Services.** **Modern Context & Niche:** In contemporary industry, **T1 has been largely replaced by M-series steels (especially M2, M35, M42)** for most general HSS applications. The M-series offers better toughness, grindability, and more consistent carbide distribution at a lower cost (molybdenum is cheaper than tungsten). However, T1 remains in use: * In regions where its traditional formulation is still favored. * For specific applications where its particular high-temperature performance profile is proven. * As a **benchmark material** in metallurgical studies and performance comparisons. ## **5. Processing & Heat Treatment Guidelines** Heat treatment of T1 is critical and requires precise control. * **Forging:** Heat slowly to **1100-1150°C (2010-2100°F)**. Forge carefully; do not forge below **950°C (1740°F)**. Cool very slowly in insulating material. * **Annealing:** Heat to **850-870°C (1565-1600°F)**, hold, then furnace cool very slowly to **500°C (930°F)**. Typical annealed hardness: 235-277 HB. * **Hardening (Austenitizing):** 1. **Preheating is absolutely critical:** Use two stages: 550-650°C (1020-1200°F) and then 800-850°C (1470-1560°F). 2. **Austenitize:** **1270-1290°C (2320-2355°F)**. This **very high temperature** is necessary to dissolve the tungsten and vanadium carbides into the austenite. Temperature control within ±5°C is vital. 3. **Quench:** In salt bath, oil, or vacuum furnace with gas quenching. Air cooling is possible for small sections but not recommended for full properties. * **Tempering (MANDATORY):** * **Temper immediately** after quenching to room temperature. * Temper at **550-570°C (1020-1060°F)** for at least 2 hours per cycle. * **Triple tempering is non-negotiable** to transform retained austenite and achieve maximum secondary hardening, hardness, and dimensional stability. * Hardness typically **increases after the first temper** (secondary hardening peak). ## **6. Historical Significance & Legacy** AISI T1 is not just a material; it is a **landmark in industrial history**. Its development marked the transition from carbon tool steels, which softened at low temperatures, to alloys that could machine at revolutionary speeds. It paved the way for all modern high-speed steels. While its direct use has diminished, its compositional philosophy—high alloy content for red-hardness—lives on in premium cobalt-bearing grades (T15) and informs the design of advanced tool materials. --- **Disclaimer:** AISI T1 is a classic but demanding grade to process. Its successful heat treatment requires sophisticated equipment capable of reaching and controlling very high temperatures precisely. Its poor grindability increases manufacturing costs. For most new tooling designs, a modern M-series or powder metallurgy HSS grade should be evaluated first for better overall economics and performance. The information provided is for reference and historical context; always consult current material data sheets for processing specifics. -:- For detailed product information, please contact sales. -: AISI Type T1 Tungsten-Alloy High-Speed-Tool Steel (UNS T12001) Specification Dimensions Size： Diameter 20-1000 mm Length <6765 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 T1 Tungsten-Alloy High-Speed-Tool Steel (UNS T12001) Properties -:- For detailed product information, please contact sales. -:

Applications of AISI Type T1 Tungsten-Alloy High-Speed-Tool Steel Flange (UNS T12001) -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI Type T1 Tungsten-Alloy High-Speed-Tool Steel Flange (UNS T12001) -:- For detailed product information, please contact sales. -:

Packing of AISI Type T1 Tungsten-Alloy High-Speed-Tool Steel Flange (UNS T12001) -:- 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 3236 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