Latrobe,LSS™ D2 Tool Steel Sheet,Plate (ASTM D2)

Latrobe LSS™ D2 Tool Steel Sheet/Plate (ASTM D2) Product Information -:- For detailed product information, please contact sales. -: Latrobe LSS™ D2 Tool Steel Sheet/Plate (ASTM D2) Synonyms -:- For detailed product information, please contact sales. -:

Latrobe LSS™ D2 Tool Steel (ASTM D2) Product Information -:- For detailed product information, please contact sales. -: # **Latrobe LSS™ D2 Tool Steel (ASTM D2)** ## **Product Overview** Latrobe LSS™ D2 is a premium-grade, high-carbon, high-chromium, air-hardening cold work tool steel that represents the industry benchmark for wear resistance in its category. Conforming to the stringent ASTM D2 specification, it offers an exceptional balance of **very high wear resistance, good dimensional stability, and moderate toughness**. Its widespread adoption is attributed to its reliability, versatility, and cost-effectiveness in applications where abrasive wear is the primary failure mechanism, making it one of the most commonly used tool steels for demanding cold work tooling. ## **Key Features & Benefits** * **Excellent Abrasive Wear Resistance:** High volume of hard, primary chromium carbides (M₇C₃ type) provides outstanding resistance to abrasive wear, significantly extending tool life in high-production environments. * **Good Dimensional Stability:** As an air-hardening steel, it exhibits minimal distortion and predictable, low net size change during heat treatment compared to oil-hardening grades, suitable for precision tools and complex dies. * **Deep Hardenability:** Can be through-hardened in substantial cross-sections via air quenching, ensuring uniform properties and wear resistance throughout the tool. * **Good Compressive Strength:** Capable of withstanding high pressure without deforming, essential for cold forming and stamping operations. * **Versatile Performance:** Offers the best practical combination of wear resistance and toughness among the high-carbon, high-chromium cold work steels (D-series), suitable for a vast range of applications. ## **International Standard & Designations** * **Primary Standard:** **ASTM A681-08 (R2019):** Standard Specification for Tool Steel Alloy. * **Grade:** **D2** * **Manufacturer's Designation:** **Latrobe LSS™ D2** * **Unified Numbering System (UNS):** **T30402** * **Common International Equivalents:** * **ISO:** **160CrMoV12** / **~HS 12-0-1** * **Germany (DIN/W-Nr.):** **1.2379 / X155CrVMo12-1** * **Japan (JIS):** **SKD11** * **Sweden (SS):** **2310** ## **Chemical Composition (%, typical - ASTM D2)** | Carbon (C) | Chromium (Cr) | Molybdenum (Mo) | Vanadium (V) | Manganese (Mn) | Silicon (Si) | Iron (Fe) | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | | 1.40 - 1.60 | 11.00 - 13.00 | 0.70 - 1.20 | 0.50 - 1.10 | 0.20 - 0.60 | 0.10 - 0.60 | Balance | *Note:* The high chromium content (11-13%) is responsible for its high hardenability and the formation of massive wear-resistant carbides. ## **Physical & Mechanical Properties (Typical)** | Property | Value / Description | | :--- | :--- | | **Density** | 7.70 g/cm³ (0.278 lb/in³) | | **Hardness (Annealed)** | 210-245 HB (Brinell) | | **Hardness (Heat Treated)** | **58 - 62 HRC** (Standard working range)
**Up to 63-64 HRC** (Achievable with optimized heat treatment for maximum wear 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 standard and essential.** Common tempering range is 480-540°C (900-1000°F) to achieve optimal toughness and stability at 58-60 HRC. | | **Dimensional Change on Hardening** | Low expansion; typically +0.07% to +0.15%. | | **Toughness** | Moderate. Higher than A7-type steels, but lower than A2 or S7. | ## **Product Applications** Latrobe LSS™ D2 is an exceptionally versatile steel used across countless industries for long-run, wear-critical tooling. * **Blanking, Piercing, and Forming Dies:** For sheet metal, especially for medium to long production runs on abrasive materials (e.g., fiberglass, composites, pre-painted steel). * **Cold Forming Rolls and Mandrels.** * **Thread Rolling Dies and Knurls.** * **Slitter Knives and Shear Blades** for metal and plastic. * **Gages, Precision Rolls, and Machine Tool Components.** * **Plastic Injection Molds** for abrasive or corrosive resins (e.g., filled plastics, fluoropolymers). * **Woodworking Knives** and wear parts. ## **Processing & Heat Treatment Notes** * **Machining:** Good machinability in the properly annealed condition (spheroidized microstructure is crucial). Use sharp tools and positive rakes. * **Heat Treatment:** **Requires thorough preheating** (e.g., at 650°C/1200°F and 850°C/1560°F) prior to austenitizing to minimize thermal shock and distortion. Use a controlled atmosphere or vacuum furnace to prevent decarburization. Quench in still or forced air to below 50-65°C (120-150°F). **Immediate double tempering (or triple for highest stability) is mandatory** to transform retained austenite, ensure dimensional stability, and develop optimal properties. The second temper should be at the same or slightly lower temperature. * **Grinding:** Can be ground in the hardened state. Use sharp, open-structure wheels and ample coolant to avoid burning due to its low thermal conductivity. * **Surface Treatments:** Excellent candidate for nitriding (gas, plasma, or salt bath) and PVD coatings (TiN, CrN, AlCrN) to dramatically enhance surface hardness, wear resistance, and anti-galling properties. --- **Disclaimer** *This product description provides typical information for D2 tool steel. Latrobe LSS™ D2 is produced to high-quality standards, and its properties are influenced by heat treatment parameters, section size, and final processing. 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™ D2 Tool Steel (ASTM D2) Specification Dimensions Size： Diameter 20-1000 mm Length <5354 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™ D2 Tool Steel (ASTM D2) Properties -:- For detailed product information, please contact sales. -:

Applications of Latrobe LSS™ D2 Tool Steel Sheet,Plate (ASTM D2) -:- For detailed product information, please contact sales. -: Chemical Identifiers Latrobe LSS™ D2 Tool Steel Sheet,Plate (ASTM D2) -:- For detailed product information, please contact sales. -:

Packing of Latrobe LSS™ D2 Tool Steel Sheet/Plate (ASTM D2) -:- 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 1825 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