Latrobe,LSS™ MGR™ Tool Steel Seamless tube (ASTM A8)

Latrobe LSS™ MGR™ Tool Steel Seamless tube (ASTM A8) Product Information -:- For detailed product information, please contact sales. -: Latrobe LSS™ MGR™ Tool Steel Seamless tube (ASTM A8) Synonyms -:- For detailed product information, please contact sales. -:

Latrobe LSS™ MGR™ Tool Steel (ASTM A8) Product Information -:- For detailed product information, please contact sales. -: # **Latrobe LSS™ MGR™ Tool Steel (ASTM A8)** ## **Product Overview** Latrobe LSS™ MGR™ is a premium-grade, air-hardening tool steel conforming to the ASTM A8 specification, engineered specifically for applications demanding a critical balance of **high toughness and exceptional wear resistance**. The "MGR" designation underscores its optimized performance in environments involving both **impact loading and abrasive wear**, filling a vital niche between shock-resistant and high-carbon, high-chromium cold work steels. It is particularly valued in heavy-duty forming, shearing, and punching operations where tools must withstand severe mechanical stress without fracturing. ## **Key Features & Benefits** * **Superior Toughness:** Provides excellent resistance to chipping, cracking, and breakage under high-impact conditions, significantly outperforming standard high-wear grades like D2 or A2 in shock-load applications. * **High Wear Resistance:** Contains a substantial volume of hard carbides, offering wear resistance superior to many other high-toughness grades (e.g., S7), thereby extending tool life in abrasive applications. * **Good Dimensional Stability:** As an air-hardening steel, it exhibits minimal distortion during quenching, ensuring the geometric integrity of complex or precision tools. * **Deep Hardenability:** Can be through-hardened in substantial cross-sections via air quenching, guaranteeing uniform core properties in large tools. * **Balanced Performance:** The hallmark of MGR™ is its ability to reliably combine two often-opposing properties: impact toughness and abrasive wear resistance. ## **International Standard & Designations** * **Primary Standard:** **ASTM A681-08 (R2019):** Standard Specification for Tool Steel Alloy. * **Grade:** **A8** * **Manufacturer's Designation:** **Latrobe LSS™ MGR™** * **Unified Numbering System (UNS):** **T30108** * **Common International Equivalents (Functional):** * There is no direct, universally adopted equivalent. It occupies a unique position. * **Germany (DIN/W-Nr.):** The closest German grade in philosophy is **1.2606** (55NiCrMoV7), though chemistry differs. * It is often compared to and selected as a tougher alternative to **A2** and a more wear-resistant alternative to **S7**. ## **Chemical Composition (%, typical - ASTM A8)** The composition is a skillful balance of carbide-forming elements for wear and alloying elements for toughness and hardenability. | Carbon (C) | Chromium (Cr) | Molybdenum (Mo) | Tungsten (W) | Vanadium (V) | Nickel (Ni)* | Manganese (Mn) | Silicon (Si) | Iron (Fe) | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | | 0.50 - 0.60 | 4.75 - 5.50 | 1.15 - 1.65 | 1.00 - 1.50 | 1.80 - 2.20 | 0.50 - 1.00 | 0.20 - 0.50 | 0.20 - 0.50 | Balance | **\*Note:** The presence of Nickel (Ni) is a key differentiator from many other cold work grades, significantly contributing to core toughness and hardenability. ## **Physical & Mechanical Properties (Typical)** | Property | Value / Description | | :--- | :--- | | **Density** | ~7.8 g/cm³ (0.282 lb/in³) | | **Hardness (Annealed)** | 200-230 HB (Brinell) | | **Hardness (Heat Treated)** | **56 - 60 HRC** (Typical optimal working range balancing toughness and wear) | | **Austenitizing Temperature** | 995 - 1025°C (1825 - 1880°F) | | **Quenching Medium** | Air (Still or Forced) | | **Tempering Temperature** | 205 - 595°C (400 - 1100°F). Often tempered between 425-540°C (800-1000°F) to achieve the optimal property balance. **Double tempering is recommended.** | | **Toughness (Impact Resistance)** | Very High for its hardness level. | | **Wear Resistance** | Good to Very Good, significantly better than S-series shock steels. | ## **Product Applications** Latrobe LSS™ MGR™ is the material of choice for demanding tooling that encounters both heavy impact and abrasive wear. * **Heavy-Duty Blanking and Punching Dies:** For punching thick plate, abrasive metals, and reinforced materials where standard dies would chip or crack. * **Forming Dies and Mandrels:** For cold forming of high-strength alloys, where high pressure and material abrasion are combined. * **Shear Blades and Slitter Knives:** For cutting abrasive or tough materials like cable, wire rope, heavy-gauge sheet, and composites. * **Hot Work Applications (Limited):** Can be used for certain hot shearing or trimming operations at lower temperatures due to its good hot hardness. * **Chisels and Tool Bits** for heavy machining or cutting of hard materials. * **Large, Complex Dies** requiring deep hardenability and minimal distortion. ## **Processing & Heat Treatment Notes** * **Machining:** Good machinability in the annealed condition. * **Heat Treatment:** Requires thorough preheating (e.g., at 650-700°C / 1200-1300°F) prior to austenitizing in a controlled atmosphere furnace. Quench in still or forced air. **Immediate tempering is required.** Double tempering ensures complete transformation of retained austenite and stress relief. The high tempering temperatures used (often 480°C/900°F+) are key to developing its unique toughness. * **Grinding:** Grinds well in the hardened state. Use proper wheels and coolant to avoid localized overheating. * **Surface Treatments:** Can be nitrided to further enhance surface wear and galling resistance for specific applications without significantly affecting the tough core. --- **Disclaimer** *This product description provides typical information for A8/MGR-type tool steel. Latrobe LSS™ MGR™ is a proprietary product, and its exact processing characteristics may be optimized. Properties are influenced by heat treatment parameters and section size. 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™ MGR™ Tool Steel (ASTM A8) Specification Dimensions Size： Diameter 20-1000 mm Length <5352 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™ MGR™ Tool Steel (ASTM A8) Properties -:- For detailed product information, please contact sales. -:

Applications of Latrobe LSS™ MGR™ Tool Steel Seamless tube (ASTM A8) -:- For detailed product information, please contact sales. -: Chemical Identifiers Latrobe LSS™ MGR™ Tool Steel Seamless tube (ASTM A8) -:- For detailed product information, please contact sales. -:

Packing of Latrobe LSS™ MGR™ Tool Steel Seamless tube (ASTM A8) -:- 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 Seamless 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 1823 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