Latrobe,LSS™ D5 Tool Steel Flange (ASTM D5)

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. -: Latrobe LSS™ D5 Tool Steel Flange (ASTM D5) Product Information -:- For detailed product information, please contact sales. -: Latrobe LSS™ D5 Tool Steel Flange (ASTM D5) Synonyms -:- For detailed product information, please contact sales. -:

Latrobe LSS™ D5 Tool Steel (ASTM D5) Product Information -:- For detailed product information, please contact sales. -: # **Latrobe LSS™ D5 Tool Steel (ASTM D5)** ## **Product Overview** Latrobe LSS™ D5 is a specialized, high-carbon, high-chromium **air-hardening** cold work tool steel that conforms to the ASTM D5 specification. Distinguished by its significant **cobalt addition**, D5 is engineered to deliver **superior performance at elevated temperatures**, offering enhanced **red-hardness (hot hardness) and resistance to tempering-back** compared to standard D-series steels like D2 and D3. This makes it the ideal choice for applications involving frictional heat generation, such as certain cold forming operations, or for tooling that benefits from higher tempering temperatures to achieve greater toughness without excessive loss of hardness. ## **Key Features & Benefits** * **Enhanced Hot Hardness & Temper Resistance:** The 2.5-3.5% cobalt content significantly improves the steel's ability to retain hardness at elevated temperatures (up to ~425°C / 800°F), preventing softening during high-speed or high-pressure operations that generate heat. * **Exceptional Abrasive Wear Resistance:** Inherits the high volume of hard chromium carbides characteristic of D-series steels, providing outstanding resistance to abrasive wear in demanding service. * **Good Dimensional Stability:** As an air-hardening grade, it offers minimal and predictable dimensional change during heat treatment, superior to oil-hardening grades like D3, making it suitable for more complex geometries. * **Deep Hardenability:** Can be through-hardened in substantial cross-sections via air quenching, ensuring uniform properties throughout the tool. * **Optimized Toughness at High Hardness:** Can be tempered at higher temperatures to achieve a favorable balance of toughness and wear resistance, often maintaining a hardness level (e.g., 58-60 HRC) that would require lower, less toughening tempering temperatures in standard D2. ## **International Standard & Designations** * **Primary Standard:** **ASTM A681-08 (R2019):** Standard Specification for Tool Steel Alloy. * **Grade:** **D5** * **Manufacturer's Designation:** **Latrobe LSS™ D5** * **Unified Numbering System (UNS):** **T30405** * **Common International Equivalents:** * **ISO:** No direct, universally adopted equivalent. Functionally similar to modified high-Cr steels with Co. * **Germany (DIN/W-Nr.):** The closest conceptual equivalent is a cobalt-modified version of **1.2379**, such as **~1.2399**. * **Japan (JIS):** No direct JIS equivalent. ## **Chemical Composition (%, typical - ASTM D5)** The key differentiator is the deliberate addition of cobalt. | Carbon (C) | Chromium (Cr) | Cobalt (Co) | Molybdenum (Mo) | Vanadium (V) | Manganese (Mn) | Silicon (Si) | Iron (Fe) | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | | 1.40 - 1.60 | 11.00 - 13.00 | 2.50 - 3.50 | 0.70 - 1.20 | 0.70 - 1.20 | 0.20 - 0.60 | 0.10 - 0.60 | Balance | ## **Physical & Mechanical Properties (Typical)** | Property | Value / Description | | :--- | :--- | | **Density** | ~7.7 g/cm³ (0.278 lb/in³) | | **Hardness (Annealed)** | 215-250 HB (Brinell) | | **Hardness (Heat Treated)** | **58 - 62 HRC** (Standard working range)
**Can be tempered at 500-540°C (930-1000°F)** and still retain 58-60 HRC, demonstrating its superior temper resistance. | | **Austenitizing Temperature** | 995 - 1040°C (1825 - 1900°F) | | **Quenching Medium** | Air (Still or Forced) | | **Tempering Temperature** | 180 - 540°C (355 - 1000°F). **Double tempering is essential.** Can utilize higher tempering ranges (480-540°C) to achieve a unique combination of high hardness and improved toughness. | | **Dimensional Change on Hardening** | Similar to D2; low expansion. | | **Toughness** | Moderate, comparable to or slightly better than D2 when tempered at equivalent hardness levels. | | **Red Hardness** | Good. Superior to D2 and D3, suitable for applications where frictional heating is a concern. | ## **Product Applications** Latrobe LSS™ D5 is specified for demanding cold work applications where heat generation or the need for a high-temperature temper is a factor. * **Cold Forming Dies & Punches:** For forming high-strength or abrasive materials where significant frictional heat is generated. * **Thread Rolling Dies:** For rolling hard or abrasive materials, where the die temperature rises during operation. * **Extrusion Dies & Mandrels** (Cold): For metals where die heating occurs. * **Wear Parts & Rolls** operating in warm environments or under conditions that cause work-piece heating. * **Blanking & Piercing Dies** for very long production runs on abrasive materials, where its enhanced temper resistance ensures consistent performance. * **Tools requiring a high tempering temperature** for stress relief or dimensional stabilization while maintaining high hardness. ## **Processing & Heat Treatment Notes** * **Machining:** Similar to D2; good machinability in the properly annealed (spheroidized) condition. * **Heat Treatment:** Follows similar guidelines to D2 but takes advantage of its wider tempering window. **Thorough preheating** is required. Austenitize in a controlled atmosphere or vacuum furnace. Air quench. **Immediate double tempering is mandatory.** The high cobalt content allows effective use of higher second tempering temperatures (e.g., 540°C/1000°F) to maximize toughness while retaining useful hardness. * **Grinding:** Grinds similarly to D2. Use sharp wheels and ample coolant to manage heat. * **Surface Treatments:** An excellent candidate for nitriding and PVD coatings to further enhance surface performance. --- **Disclaimer** *This product description provides typical information for D5 tool steel. Latrobe LSS™ D5 is a specialized grade whose properties are highly dependent on precise heat treatment. For critical applications, always consult the latest official technical data sheets and processing guidelines from Latrobe Specialty Steel to determine suitability and optimal processing parameters.* -:- For detailed product information, please contact sales. -: Latrobe LSS™ D5 Tool Steel (ASTM D5) Specification Dimensions Size： Diameter 20-1000 mm Length <5356 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. -: Latrobe LSS™ D5 Tool Steel (ASTM D5) Properties -:- For detailed product information, please contact sales. -:

Applications of Latrobe LSS™ D5 Tool Steel Flange (ASTM D5) -:- For detailed product information, please contact sales. -: Chemical Identifiers Latrobe LSS™ D5 Tool Steel Flange (ASTM D5) -:- For detailed product information, please contact sales. -:

Packing of Latrobe LSS™ D5 Tool Steel Flange (ASTM D5) -:- 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 1827 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