Assab Steel Sheet,Plates, 8407 SUPREME Hot Work Steel Sheet,Plate

Assab Steel Sheet/Plates 8407 SUPREME Hot Work Steel Sheet/Plate Product Information -:- For detailed product information, please contact sales. -: Assab Steel Sheet/Plates 8407 SUPREME Hot Work Steel Sheet/Plate Synonyms -:- For detailed product information, please contact sales. -:

Assab Steels 8407 SUPREME Hot Work Steel Product Information -:- For detailed product information, please contact sales. -: # **Product Datasheet: Assab Steels 8407 SUPREME Premium Hot Work Tool Steel** ## **Product Overview** **Assab Steels 8407 SUPREME** is a premium **chromium-molybdenum-vanadium hot work tool steel** engineered for superior performance in high-temperature applications. As an enhanced version of the standard H13-type steel, 8407 SUPREME offers improved **thermal fatigue resistance, toughness, and thermal conductivity** through optimized alloy design and advanced manufacturing processes. This material is specifically developed for demanding die casting, extrusion, and hot forming applications where reliability and extended service life are critical. ## **Key Characteristics & Advantages** - **Excellent Thermal Fatigue Resistance:** Withstands repeated thermal cycling without cracking - **High Toughness at Elevated Temperatures:** Maintains impact resistance under operating conditions - **Good Thermal Conductivity:** Efficient heat dissipation reduces thermal stress - **Superior Temper Resistance:** Maintains hardness at elevated temperatures - **Good Machinability and Polishability:** Easier to process than many hot work steels - **Excellent Dimensional Stability:** Minimal distortion during heat treatment - **Good Hardenability:** Through-hardening in substantial sections - **Enhanced Cleanliness:** Improved micro-cleanliness for better fatigue properties ## **Standard Specifications & International Designations** | **Standard** | **Designation** | **Notes** | |--------------|-----------------|-----------| | **Assab/Uddeholm** | **8407 SUPREME** | Premium H13 variant | | **AISI/ASTM** | **H13 (Enhanced)** | Superior to standard H13 | | **DIN/EN** | **1.2344 (X40CrMoV5-1)** | Premium quality | | **JIS** | **SKD61 (Premium)** | Enhanced version | | **ISO** | **HTF 4** | Hot work tool steel classification | | **GB** | **4Cr5MoSiV1 (Enhanced)** | Chinese standard equivalent | | **Material Category** | **Premium Hot Work Tool Steel** | For aluminum, magnesium, zinc die casting | ## **Chemical Composition (Typical, Weight %)** | Element | Content (%) | Primary Function | Benefit | |---------|-------------|------------------|---------| | **Carbon (C)** | 0.38-0.42 | Matrix strength & carbide formation | Balanced hardness & toughness | | **Chromium (Cr)** | 5.00-5.50 | Heat resistance & hardenability | Oxidation resistance & through-hardening | | **Molybdenum (Mo)** | 1.30-1.50 | Hot strength & secondary hardening | High temperature strength | | **Vanadium (V)** | 0.90-1.10 | Carbide formation & grain refinement | Wear resistance & thermal fatigue | | **Silicon (Si)** | 0.90-1.10 | Deoxidizer & temper resistance | Improved high temperature strength | | **Manganese (Mn)** | 0.30-0.50 | Hardenability | Consistent hardening response | | **Sulfur (S)** | ≤0.005 | Machinability (controlled) | Improved machinability | | **Phosphorus (P)** | ≤0.015 | Purity control | Enhanced toughness | | **Iron (Fe)** | **Balance** | Matrix | Structural integrity | ***Special Note:** The optimized balance of chromium, molybdenum, and vanadium, combined with controlled sulfur for improved machinability, distinguishes 8407 SUPREME from standard H13 grades.* ## **Microstructural Characteristics** | Feature | Specification | Benefit | |---------|---------------|---------| | **Carbide Types** | Fine MC (vanadium), M₂C, M₇C₃ carbides | Good wear & thermal fatigue resistance | | **Carbide Distribution** | Uniform, fine dispersion | Consistent properties, no banding | | **Grain Size** | ASTM 8-10 (fine) | Improved toughness & fatigue life | | **Microcleanliness** | Improved over standard H13 | Better fatigue & fracture resistance | | **Segregation** | Minimal | Uniform properties in all directions | ## **Typical Heat Treatment** ### **1. Annealing** - **Temperature:** **850-880°C (1560-1615°F)** - **Cooling:** Slow furnace cool (≤20°C/hour) to 600°C, then air cool - **Annealed Hardness:** **185-210 HB** - **Purpose:** Optimal condition for machining ### **2. Stress Relieving** - **Temperature:** **600-650°C (1110-1200°F)** - **Application:** After rough machining - **Duration:** 2 hours per 25 mm thickness ### **3. Hardening** 1. **Preheating:** **650°C (1200°F)** and **850°C (1560°F)** 2. **Austenitizing:** **1000-1030°C (1830-1885°F)** - **Standard:** 1020-1030°C (1870-1885°F) - **High Toughness:** 1000-1010°C (1830-1850°F) - **Maximum Hot Strength:** 1025-1030°C (1875-1885°F) 3. **Soaking Time:** 20-40 minutes (depending on section size) 4. **Quenching:** **Air** or **high-pressure gas** (oil for complex shapes) ### **4. Tempering** - **Immediate Requirement:** Temper immediately after cooling to 50-70°C - **Temperature Range:** **540-650°C (1005-1200°F)** - **Typical Practice:** Double tempering, with cooling to room temperature between cycles - **Hardness Development:** - 540°C (1005°F): 50-52 HRC - 560°C (1040°F): 48-50 HRC - 580°C (1075°F): 46-48 HRC - 600°C (1110°F): 44-46 HRC - 620°C (1150°F): 40-42 HRC ### **5. Nitriding (Optional)** - **Process:** Gas or plasma nitriding - **Temperature:** 480-530°C (895-985°F) - **Case Depth:** 0.1-0.3 mm typical - **Surface Hardness:** 1000-1200 HV ## **Physical Properties** | Property | Value | Unit | Conditions | |----------|-------|------|------------| | **Density** | 7.80 | g/cm³ | At 20°C | | **Modulus of Elasticity** | 210 | GPa | At 20°C | | **Thermal Expansion Coefficient** | 11.5 | ×10⁻⁶/K | 20-100°C | | **Thermal Conductivity** | 25.0 | W/(m·K) | At 20°C | | **Specific Heat Capacity** | 460 | J/(kg·K) | At 20°C | ## **Mechanical Properties** ### **Standard Condition (1025°C Austenitize / 580°C×2 Temper)** | Property | Value Range | Unit | Test Conditions | |----------|-------------|------|-----------------| | **Hardness** | 46-48 | HRC | Room temperature | | **Tensile Strength** | 1500-1600 | MPa | Room temperature | | **Yield Strength (0.2%)** | 1350-1450 | MPa | Room temperature | | **Elongation** | 10-12 | % | Room temperature | | **Impact Toughness (Charpy V)** | 40-50 | J | Room temperature | | **Hot Hardness (500°C)** | 38-40 | HRC | After 1 hour exposure | | **Thermal Fatigue Resistance** | Excellent | - | Comparative testing | ### **High Temperature Properties** | Temperature | Tensile Strength | Yield Strength | Impact Toughness | |-------------|-----------------|----------------|------------------| | **200°C (390°F)** | 1300-1400 MPa | 1200-1300 MPa | 35-45 J | | **400°C (750°F)** | 1000-1100 MPa | 900-1000 MPa | 30-40 J | | **600°C (1110°F)** | 600-700 MPa | 550-650 MPa | 25-35 J | ## **Primary Applications** ### **A. Die Casting** - **Aluminum Die Casting Dies:** Core pins, cavities, inserts, ejector pins - **Magnesium Die Casting:** Hot chamber components - **Zinc Die Casting:** High-volume production dies - **Copper-Based Alloy Casting:** Lower temperature applications ### **B. Hot Extrusion** - **Aluminum Extrusion Dies:** Dies, mandrels, backers - **Brass Extrusion Tools:** For lower temperature applications - **Steel Extrusion:** For specialized applications ### **C. Hot Forging** - **Forging Dies:** For non-ferrous metals - **Die Inserts:** For wear-prone areas - **Punches and Mandrels:** For hot forging operations ### **D. Plastic Molding** - **Hot Runner Systems:** Manifolds, nozzles, tips - **High-Temperature Molds:** For engineering plastics - **Insert Molding:** Where heat resistance is required ### **E. Other Hot Work Applications** - **Glass Molding Tools** - **Press Quenching Dies** - **Hot Stamping Tools** - **Heat Treatment Fixtures** ## **Processing Guidelines** ### **1. Machining** - **Annealed Condition:** 190-210 HB (optimal for machining) - **Machinability:** Good (70-80% relative to 1% C-steel) - **Tool Materials:** HSS or carbide recommended - **Cutting Parameters:** Standard for alloy steels - **Coolant:** Recommended for all operations ### **2. Grinding** - **Wheel Selection:** Aluminum oxide or silicon carbide - **Parameters:** Standard grinding practices apply - **Coolant:** Essential to prevent overheating - **Surface Finish:** Good polishability achievable ### **3. EDM (Electrical Discharge Machining)** - **Suitable:** Yes, with standard procedures - **Post-EDM:** Stress relieve to remove white layer effects - **Finishing:** Polish or grind to remove recast layer ### **4. Welding** - **Repairable:** Yes, with proper procedure - **Preheating:** 400-450°C (750-840°F) - **Post-Weld:** Slow cool and re-temper - **Electrodes:** Matching composition recommended ### **5. Surface Treatments** - **Nitriding:** Commonly applied for improved wear resistance - **PVD Coatings:** TiN, TiCN, CrN for specific applications - **Oxidation:** Black oxide for corrosion resistance ## **Comparative Performance** ### **vs. Standard H13** | Property | 8407 SUPREME | Standard H13 | Improvement | |----------|--------------|--------------|-------------| | **Thermal Fatigue Life** | 100% | 80-85% | 15-20% | | **Impact Toughness** | 100% | 90-95% | 5-10% | | **Machinability** | 100% | 90-95% | 5-10% | | **Polishability** | 100% | 95-98% | 2-5% | | **Dimensional Stability** | 100% | 95-98% | 2-5% | ### **vs. Competing Hot Work Steels** | Steel Grade | Best Application | Relative Cost | Key Advantage | |-------------|------------------|---------------|---------------| | **8407 SUPREME** | General hot work | 100% | Balanced properties | | **H11** | High toughness | 90-95% | Better toughness | | **H10/H19** | High hot hardness | 110-120% | Better hot strength | | **H21** | Very high temperatures | 105-110% | Higher temperature capability | ## **Quality Assurance** ### **Material Certification** - **Chemical Analysis:** Full spectrographic analysis - **Hardness Testing:** Brinell and Rockwell verification - **Ultrasonic Testing:** Available for critical applications - **Microcleanliness:** Controlled inclusion content ### **Available Forms** | Form | Standard Sizes | Surface Condition | |------|---------------|-------------------| | **Round Bars** | Ø20-300 mm | Black, ground, or peeled | | **Flat Bars** | Various sizes | Ground surfaces | | **Blocks** | Custom dimensions | Rough machined | | **Pre-machined Blanks** | As specified | Semi-finished | ## **Application Guidelines** ### **Die Casting Specific Recommendations** 1. **Preheating:** Always preheat dies to 180-250°C (355-480°F) 2. **Temperature Control:** Maintain uniform die temperature 3. **Venting:** Proper venting to reduce heat checking 4. **Cooling:** Optimized cooling channels for thermal management ### **Heat Treatment for Die Casting** - **Hardness Range:** 44-48 HRC typical - **Tempering:** Minimum 25°C above operating temperature - **Nitriding:** Recommended for cores and wear surfaces ### **Maintenance Practices** 1. **Regular Inspection:** Check for heat checking and erosion 2. **Stress Relieving:** Periodic thermal stress relief 3. **Repair Welding:** Timely repair of damaged areas 4. **Surface Refurbishment:** Polish or re-nitride as needed ## **Economic Considerations** - **Material Cost:** Premium over standard H13 (10-20% higher) - **Tool Life:** 20-40% improvement in thermal fatigue life - **Downtime Reduction:** Extended service intervals - **Overall Value:** Excellent for high-volume or critical applications --- ## **Technical Notes** ### **Special Advantages for Die Casting:** 1. **Reduced Heat Checking:** Superior thermal fatigue resistance 2. **Better Erosion Resistance:** Against molten aluminum 3. **Improved Soldering Resistance:** To molten metals 4. **Easier Maintenance:** Good weldability and repairability ### **Limitations:** - **Not for copper-based alloys** at high temperatures - **Limited use above 600°C (1110°F)** continuous operation - **Requires proper heat treatment** for optimal performance ### **Industry Standards Compliance:** - **NADCA (North American Die Casting Association)** recommended - **ISO 4957** compliant for hot work tool steels - **Customer-specific specifications** can be met --- **Disclaimer:** 8407 SUPREME is a premium hot work tool steel requiring proper heat treatment and application knowledge. Consult with Assab technical specialists for application-specific recommendations. Performance data based on laboratory testing; actual performance may vary with specific conditions. Always follow current technical documentation and safety guidelines. -:- For detailed product information, please contact sales. -: Assab Steels 8407 SUPREME Hot Work Steel Specification Dimensions Size： Diameter 20-1000 mm Length <6854 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 SUPREME Hot Work Steel Properties -:- For detailed product information, please contact sales. -:

Applications of Assab Steel Sheet,Plates 8407 SUPREME Hot Work Steel Sheet,Plate -:- For detailed product information, please contact sales. -: Chemical Identifiers Assab Steel Sheet,Plates 8407 SUPREME Hot Work Steel Sheet,Plate -:- For detailed product information, please contact sales. -:

Packing of Assab Steel Sheet/Plates 8407 SUPREME Hot Work Steel Sheet/Plate -:- 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 3325 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