Latrobe,Knocor™ Hot Work Tool Steel Tube,Pipe

Latrobe Knocor™ Hot Work Tool Steel Tube Product Information -:- For detailed product information, please contact sales. -: Latrobe Knocor™ Hot Work Tool Steel Tube Synonyms -:- For detailed product information, please contact sales. -:

Latrobe Knocor™ Hot Work Tool Steel Product Information -:- For detailed product information, please contact sales. -: # **Latrobe Knocor™ Hot Work Tool Steel** ## **Product Overview** Latrobe Knocor™ is a premium-grade, chromium-based hot work tool steel engineered for exceptional performance in high-temperature forming applications. Developed to withstand the severe thermal cycling, mechanical stress, and abrasive wear encountered in hot forging, die casting, and extrusion operations, Knocor™ delivers an outstanding balance of **high-temperature strength, thermal fatigue resistance (heat checking resistance), and wear resistance**. Its optimized chemistry and controlled manufacturing process ensure consistent microstructure and properties, providing extended die life, reduced production downtime, and superior reliability in demanding industrial environments. ## **Key Features & Benefits** * **Superior Thermal Fatigue Resistance:** Exhibits excellent resistance to the initiation and propagation of heat-checking cracks caused by repeated heating and cooling cycles, a critical factor for die longevity. * **High Temper Resistance & Hot Hardness:** Maintains significant hardness and strength at elevated operating temperatures (typically up to 600°C / 1112°F), preventing die deformation under load. * **Good Toughness & Impact Resistance:** Provides necessary resistance to mechanical shock and cracking during high-pressure forming operations, such as forging hammer blows or extrusion pressures. * **Enhanced Wear & Erosion Resistance:** Offers good resistance to abrasive wear from workpiece materials and erosive wash from molten metals, maintaining dimensional accuracy of the die cavity. * **Good Hardenability & Dimensional Stability:** Allows for through-hardening in moderate sections with minimal distortion during heat treatment, ensuring precise die geometry. ## **International Standard & Designations** * **Primary Standard:** **ASTM A681-08 (R2019):** Standard Specification for Tool Steel Alloy. * **Grade:** Corresponds most closely to **H13**, with potential proprietary enhancements. * **Unified Numbering System (UNS):** **T20813** (Standard H13 equivalent) * **Common International Equivalents:** * **ISO:** **35CrMoV5** / **H13** designation. * **Germany (DIN/W-Nr.):** **1.2344 / X40CrMoV5-1** * **Japan (JIS):** **SKD61** * **Sweden (SS):** **2242** ## **Chemical Composition (%, typical - based on H13-type chemistry)** Knocor™ features a balanced chromium-molybdenum-vanadium composition optimized for hot work. | Carbon (C) | Chromium (Cr) | Molybdenum (Mo) | Vanadium (V) | Silicon (Si) | Manganese (Mn) | Iron (Fe) | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | | 0.35 - 0.42 | 4.75 - 5.50 | 1.10 - 1.75 | 0.80 - 1.20 | 0.80 - 1.20 | 0.20 - 0.50 | Balance | *Note:* The composition promotes the formation of stable carbides (MC, M₂C, M₇C₃) that provide high-temperature strength and wear resistance. Silicon enhances oxidation resistance and tempering resistance. ## **Physical & Mechanical Properties (Typical)** | Property | Value / Description | | :--- | :--- | | **Density** | 7.80 g/cm³ (0.282 lb/in³) | | **Hardness (Annealed)** | 192-229 HB (Brinell) | | **Hardness (Heat Treated)** | **40 - 52 HRC** (Typical working range, depending on application)
**~46-50 HRC** (Common optimum for many hot work applications) | | **Austenitizing Temperature** | 1010 - 1060°C (1850 - 1940°F) | | **Tempering Temperature** | 540 - 650°C (1000 - 1200°F) (Double tempering required) | | **Thermal Conductivity** | ~25 W/m·K at 400°C (Good for dissipating heat from the die surface) | | **Coefficient of Thermal Expansion** | ~12.0 x 10⁻⁶ /K (20-500°C) | ## **Product Applications** Latrobe Knocor™ is the workhorse steel for a wide range of hot forming tooling where thermal management and durability are paramount. * **Die Casting & Pressure Die Casting:** * Cores and cavities for aluminum, magnesium, and zinc die casting dies. * Ingot molds, goosenecks, and plunger tips. * **Hot Forging:** * Hammer and press forging dies for steel, titanium, and superalloys. * Die inserts, punches, and holders. * **Hot Extrusion:** * Extrusion dies, mandrels, and containers for aluminum and copper alloys. * **Other Hot Work Applications:** * Hot shear blades and punches. * Glass molding tools. * Tools for isothermal and hot upset forging. ## **Processing & Heat Treatment Notes** * **Soft Machining:** Best performed in the annealed condition. * **Heat Treatment:** Requires thorough preheating (typically in two stages) prior to austenitizing in a controlled atmosphere or vacuum furnace to prevent decarburization and minimize distortion. Quenching is usually performed in still air (air-hardening) or forced air for larger sections. **Double tempering is mandatory** to transform retained austenite and achieve optimal toughness and dimensional stability. The second tempering temperature should be equal to or slightly lower than the first. * **Surface Treatments:** Nitriding (gas or plasma) is commonly applied to significantly enhance surface hardness, wear resistance, and anti-galling properties, further extending die life. --- **Disclaimer** *This product description is based on the typical characteristics of H13-type hot work tool steels and is provided for informational purposes. Latrobe Knocor™ may incorporate specific proprietary enhancements. The exact chemical composition, properties, and optimal heat treatment cycles may vary. It is the responsibility of the end-user to obtain and follow the latest official technical data sheets and processing guidelines from Latrobe Specialty Steel and to validate the material's suitability for any specific application.* -:- For detailed product information, please contact sales. -: Latrobe Knocor™ Hot Work Tool Steel Specification Dimensions Size： Diameter 20-1000 mm Length <5348 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 Knocor™ Hot Work Tool Steel Properties -:- For detailed product information, please contact sales. -:

Applications of Latrobe Knocor™ Hot Work Tool Steel Tube -:- For detailed product information, please contact sales. -: Chemical Identifiers Latrobe Knocor™ Hot Work Tool Steel Tube -:- For detailed product information, please contact sales. -:

Packing of Latrobe Knocor™ Hot Work Tool Steel Tube -:- 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 Tube 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 1819 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