Assab Steel Sheet,Plates,DIEVAR Hot Work Steel Sheet,Plate

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

Assab Steels DIEVAR Hot Work Steel Product Information -:- For detailed product information, please contact sales. -: ## **Assab Steels DIEVAR: Premium Chromium-Hot Work Steel for Demanding Die Casting Applications** --- ### **Product Overview** Assab Steels DIEVAR is a specially formulated, premium-grade chromium hot work tool steel developed through advanced metallurgical technology and Electro-Slag Remelting (ESR) process. Designed specifically for aluminum, magnesium, and zinc die-casting applications, DIEVAR offers superior performance compared to conventional H13-type steels by significantly extending die life through enhanced thermal fatigue resistance and improved high-temperature stability. ### **Key Technical Advantages** - **Exceptional Thermal Fatigue Resistance**: Advanced alloy design minimizes heat checking and crack propagation under severe thermal cycling conditions - **Optimized High-Temperature Strength**: Maintains hardness and strength at operating temperatures up to 650°C - **Enhanced Toughness**: Superior impact resistance reduces susceptibility to catastrophic failure - **Excellent Thermal Conductivity**: Promotes rapid heat dissipation, reducing thermal gradients and stress concentrations - **Outstanding Dimensional Stability**: Minimal distortion during heat treatment and service ### **International Standard Designations** | Standard System | Designation | |----------------|-------------| | **Assab/Uddeholm** | DIEVAR (ESR) | | **AISI/ASTM** | Modified H13 (Proprietary) | | **European Norm (EN)** | 1.2367 (Modified) | | **DIN** | X38CrMoV5-3 | | **JIS** | SKD61 (Enhanced) | | **Common Industry Reference** | Premium Die-Casting Steel | ### **Chemical Composition (Typical Weight %)** | Element | C | Si | Mn | Cr | Mo | V | |---------|----|----|----|----|----|----| | **Content** | 0.35 | 0.30 | 0.50 | 5.00 | 2.30 | 0.60 | *Additional micro-alloying elements may include trace amounts of nickel and copper for enhanced performance characteristics.* ### **Physical Properties** | Property | Value | Conditions | |----------|-------|------------| | **Density** | 7.80 g/cm³ | At 20°C | | **Thermal Conductivity** | 29.0 W/m·K | At 20°C | | **Coefficient of Thermal Expansion** | 11.8 × 10⁻⁶/K | 20-200°C | | **Specific Heat Capacity** | 450 J/kg·K | At 20°C | | **Elastic Modulus** | 210 GPa | At 20°C | | **Thermal Diffusivity** | 12.5 mm²/s | At 20°C | ### **Mechanical Properties** | Hardness (HRC) | Tensile Strength (MPa) | Yield Strength (MPa) | Impact Toughness (J) | |----------------|----------------------|-------------------|---------------------| | 44-48 | 1450-1600 | 1250-1400 | 25-35 | | 48-50 | 1600-1750 | 1400-1550 | 20-28 | | 50-52 | 1750-1900 | 1550-1700 | 15-22 | *Note: Properties are typical for tempered conditions at respective hardness levels.* ### **Heat Treatment Specifications** #### **Annealing** - **Temperature**: 850-900°C - **Cooling**: Furnace cool to 500°C, then air cool - **Annealed Hardness**: ≤ 230 HB #### **Stress Relieving** - **Temperature**: 600-650°C - **Holding Time**: 2 hours per 25 mm thickness #### **Hardening** - **Preheating**: 600-650°C and 850-900°C (two-stage) - **Austenitizing**: 1020-1050°C - **Quenching**: High-pressure gas or oil quenching - **Holding Time**: 30 minutes per 25 mm at austenitizing temperature #### **Tempering** - **Temperature**: 540-650°C (double tempering mandatory) - **Holding Time**: Minimum 2 hours per temper - **Cooling**: Air cool to room temperature between tempers ### **Typical Applications** #### **Primary Applications** 1. **High-Pressure Aluminum Die Casting** - Core and cavity inserts - Complex thin-wall components - Structural automotive parts - Engine blocks and transmission cases 2. **Magnesium Die Casting** - Laptop and mobile device housings - Automotive interior components - Aerospace structural parts 3. **Zinc Die Casting** - High-precision components - Decorative hardware - Electrical connectors #### **Secondary Applications** - **Hot forging dies** for aluminum and copper alloys - **Hot extrusion tools** for non-ferrous metals - **Plastic injection molds** for engineering polymers - **Hot work punches and mandrels** ### **Performance Comparison with Standard H13** | Performance Parameter | DIEVAR vs. Standard H13 | |----------------------|-------------------------| | **Thermal Fatigue Life** | +50-100% improvement | | **Heat Checking Resistance** | Superior crack initiation resistance | | **High-Temperature Hardness** | Better retention above 500°C | | **Toughness at Operating Temp** | 15-25% higher impact values | | **Polishing Characteristics** | Superior surface finish capability | | **Dimensional Stability** | Reduced distortion during heat treatment | ### **Machining and Fabrication** #### **Machining in Annealed Condition** - **Turning**: Good machinability with proper tool geometry - **Milling**: Recommended cutting speeds 60-100 m/min - **Drilling**: Use high-speed steel or carbide tools with sufficient coolant - **EDM**: Excellent performance with fine finishes #### **Grinding in Hardened Condition** - Use aluminum oxide or CBN wheels - Maintain adequate coolant flow - Employ light passes to avoid thermal damage - Recommended for final dimensional accuracy ### **Surface Treatments** - **Nitriding**: Gas or plasma nitriding for enhanced surface hardness (1000-1200 HV) - **PVD/CVD Coatings**: TiN, TiAlN, or DLC coatings for specific applications - **Polishing**: Capable of achieving mirror finishes (≤ 0.05 μm Ra) ### **Quality Assurance** - **ESR Process**: Ensures exceptional cleanliness and homogeneity - **Ultrasonic Testing**: Performed to strict internal standards - **Microstructure Control**: Guaranteed fine, uniform carbide distribution - **Traceability**: Full documentation from melt to final product ### **Available Product Forms** - ESR ingots and blocks - Precision ground flat stock - Black-rolled or peeled bars - Custom pre-machined components - Semi-finished die sets - Standard and custom sizes available ### **Technical Support Services** - Heat treatment recommendations - Application engineering support - Failure analysis services - Machining and fabrication guidelines - Customized metallurgical solutions ### **Industry Certifications** - ISO 9001:2015 Quality Management - ISO 14001:2015 Environmental Management - Material certifications per EN 10204 3.1/3.2 ### **Conclusion** Assab Steels DIEVAR represents the pinnacle of hot work tool steel technology for die-casting applications. Its optimized chemical composition combined with the ESR manufacturing process delivers unmatched performance in demanding aluminum, magnesium, and zinc die-casting operations. By significantly extending die life, reducing maintenance downtime, and improving part quality consistency, DIEVAR provides substantial return on investment for high-volume production environments. The steel's balanced combination of thermal fatigue resistance, high-temperature strength, and toughness makes it the material of choice for critical die-casting applications where reliability and productivity are paramount. -:- For detailed product information, please contact sales. -: Assab Steels DIEVAR Hot Work Steel Specification Dimensions Size： Diameter 20-1000 mm Length <7241 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 DIEVAR Hot Work Steel Properties -:- For detailed product information, please contact sales. -:

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

Packing of Assab Steel Sheet/Plates DIEVAR 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 3712 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