Assab Steel Tube,Pipes,8407 2M Hot Work Steel Tube,Pipe

Assab Steel Tubes 8407 2M Hot Work Steel Tube Product Information -:- For detailed product information, please contact sales. -: Assab Steel Tubes 8407 2M Hot Work Steel Tube Synonyms -:- For detailed product information, please contact sales. -:

Assab Steels 8407 2M Hot Work Steel Product Information -:- For detailed product information, please contact sales. -: ### **Assab Steels 8407 2M: Premium Quality ESR H13 Hot Work Steel for Enhanced Toughness** --- #### **1. Introduction** **Assab Steels 8407 2M** is a premium-grade, chromium-molybdenum-vanadium (Cr-Mo-V) hot work tool steel manufactured through the **Electro-Slag Remelting (ESR)** process. It belongs to the internationally recognized H13/1.2344 family but is distinguished by its enhanced purity and superior, **isotropic mechanical properties**. The "2M" designation indicates a specific quality grade within the 8407 series, optimized to deliver exceptional toughness, thermal fatigue resistance, and consistent performance in all directions (transverse and longitudinal). It is the benchmark material for critical hot work applications demanding the highest reliability. **Key Value Propositions:** * **Superior Transverse Toughness:** The ESR process drastically reduces non-metallic inclusions and directional segregation, resulting in high and uniform impact strength, significantly reducing the risk of unexpected cracking. * **Excellent Thermal Fatigue Resistance:** Outstanding resistance to the initiation and propagation of heat-checking cracks caused by cyclic thermal stress. * **High Isotropic Consistency:** Mechanical and thermal properties are uniform in all orientations, ensuring predictable tool behavior and performance. * **Excellent Polishability & Texture Transfer:** The clean, homogeneous microstructure allows for superior surface finishes, crucial for high-quality casting and molding surfaces. * **Good Thermal Conductivity & Hot Hardness:** Efficient heat dissipation and retained strength at elevated operating temperatures. --- #### **2. International Standard Designations** * **Assab / Uddeholm:** 8407 2M (ESR Quality) * **AISI / ASTM A681:** H13 (ESR Premium) * **European Norm (EN):** 1.2344 (X40CrMoV5-1-1) ESR * **DIN:** X40CrMoV5-1 (ESR) * **JIS:** SKD61 (ESR) * **GB (China):** 4Cr5MoSiV1 (ESR) --- #### **3. Chemical Composition (Typical Weight %)** | Element | Carbon (C) | Silicon (Si) | Chromium (Cr) | Molybdenum (Mo) | Vanadium (V) | Manganese (Mn) | | :--- | :---: | :---: | :---: | :---: | :---: | :---: | | **%** | 0.39 | 1.00 | 5.20 | 1.40 | 0.90 | 0.40 | *The balanced composition provides optimal hot strength, toughness, and wear resistance. The ESR process refines this chemistry into an exceptionally pure structure.* --- #### **4. Physical & Mechanical Properties** * **Density:** 7.80 g/cm³ * **Thermal Conductivity:** 28.0 W/m·K (at 20°C) * **Coefficient of Thermal Expansion:** 11.5 x 10⁻⁶/K (20-200°C) * **Specific Heat Capacity:** 460 J/kg·K * **Elastic Modulus:** 210 GPa * **Typical Operational Hardness:** **44-52 HRC** * *Aluminum Die Casting:* 46-48 HRC * *Hot Forging / Extrusion:* 48-52 HRC * **Key Advantage (vs. conventional):** **Transverse Impact Toughness** is significantly higher and nearly equal to longitudinal toughness, a critical factor for die integrity. --- #### **5. Heat Treatment** * **Soft Annealed Hardness:** ~ 185 HB * **Stress Relieving (after rough machining):** 600-650°C * **Preheating:** Essential. Recommend 650°C and 850°C (two stages). * **Austenitizing Temperature:** 1020-1050°C (Vacuum or controlled atmosphere). * **Quenching:** High-pressure gas quenching (preferred for minimal distortion) or oil. * **Tempering:** **Double tempering is mandatory.** Temper between **540-650°C**, typically aiming for 40-50°C above the intended service temperature. Hardness adjusts with tempering temperature. --- #### **6. Product Applications** 8407 2M is the preferred choice for high-stress, high-reliability hot work tooling where failure is not an option. 1. **High-Pressure Die Casting (Aluminum, Magnesium, Zinc):** * Critical core and cavity inserts for large automotive components (engine blocks, transmission cases). * High-stress thin-wall castings. * Units subject to high thermal shock. 2. **Hot Forging & Pressing:** * Precision forging dies for automotive and aerospace components. * High-wear inserts and punches. * Tools for forging high-temperature alloys. 3. **Hot & Warm Extrusion:** * Extrusion dies and backers for aluminum and copper alloys. * Mandrels and dummy blocks requiring high toughness. 4. **Advanced Plastic Molding:** * Cavities and cores for high-temperature, abrasive, or corrosive engineering plastics (e.g., PEEK, reinforced nylons). * Hot runner system components. --- #### **7. Quality & Supply Forms** * **Quality:** ESR-processed, ensuring low sulfur content and extreme cleanliness. Subject to stringent ultrasonic testing. * **Available Forms:** * ESR blocks and billets. * Precision ground flat stock. * Black or peeled round and flat bars. * Custom pre-machined components. --- #### **8. Comparison: 8407 2M vs. Standard H13 / 8407** | **Property** | **8407 2M (ESR)** | **Standard Air-Melted H13** | | :--- | :--- | :--- | | **Microstructure Cleanliness** | Excellent (Low inclusion count) | Standard | | **Transverse Toughness** | **Very High & Isotropic** | Lower, Anisotropic | | **Resistance to Crack Initiation** | Superior | Good | | **Polishability** | Excellent (Mirror finish achievable) | Good | | **Consistency in Large Sections** | Excellent | Variable | | **Primary Application Focus** | Critical, high-stress tools | General purpose tools | --- #### **9. Conclusion** **Assab Steels 8407 2M** is not just another H13 steel; it is the **premium ESR incarnation** of this workhorse grade. By offering dramatically improved toughness, especially in the transverse direction, and unmatched isotropic consistency, it solves the most common failure modes in demanding hot work applications. For toolmakers and manufacturers where die life, part quality, and production uptime are critical, investing in 8407 2M provides a tangible return through reduced catastrophic failures, extended service intervals, and superior finished product quality. It is the definitive choice when the application demands the utmost performance from H13-type steel. -:- For detailed product information, please contact sales. -: Assab Steels 8407 2M Hot Work Steel Specification Dimensions Size： Diameter 20-1000 mm Length <7242 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. -: Assab Steels 8407 2M Hot Work Steel Properties -:- For detailed product information, please contact sales. -:

Applications of Assab Steel Tubes 8407 2M Hot Work Steel Tube -:- For detailed product information, please contact sales. -: Chemical Identifiers Assab Steel Tubes 8407 2M Hot Work Steel Tube -:- For detailed product information, please contact sales. -:

Packing of Assab Steel Tubes 8407 2M Hot Work 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 3713 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