MetalTek MTEK D2 Cast UNS T90402 Tool Steel

MetalTek MTEK D2 Cast UNS T90402 Tool Steel Product Information -:- For detailed product information, please contact sales. -: MetalTek MTEK D2 Cast UNS T90402 Tool Steel Synonyms -:- For detailed product information, please contact sales. -:

MetalTek MTEK D2 Cast UNS T90402 Tool Steel Product Information -:- For detailed product information, please contact sales. -: # **Product Introduction: MetalTek MTEK D2 Cast Tool Steel (UNS T90402)** ## **1. Overview** **MetalTek MTEK D2 Cast Tool Steel** is a premium **high-carbon, high-chromium, air-hardening cold work tool steel** manufactured through **specialized investment casting processes** to produce near-net-shape components with exceptional wear resistance and complex geometries. Designated as **UNS T90402** (the cast equivalent of wrought AISI D2, UNS T30402), this material delivers the legendary **abrasion resistance and high hardness** of standard D2 tool steel in cast form. By utilizing advanced foundry techniques, MetalTek enables the production of large, intricate, or customized wear components and tooling that would be economically unfeasible to machine from solid bar stock, while maintaining the critical carbide structure and metallurgical properties that define D2's performance. ## **2. International Standards & Specifications** This material is the cast product form counterpart to the globally recognized wrought D2 standard. * **Primary Standard Designations:** * **UNS T90402:** Unified Numbering System designation for **Cast D2 Tool Steel**. * **Wrought Reference Standard:** **AISI D2 / UNS T30402 / ASTM A681**. * **Governing Cast Standard:** **ASTM A597** Standard Specification for Cast Tool Steel. Specific foundry grades (e.g., CD-2) correspond to D2 composition. * **Key International Equivalents (Wrought Reference):** * **DIN 1.2379 / EN ISO 4957 X153CrMoV12** * **JIS G4404 SKD11** * **GB/T 1299 Cr12Mo1V1** * **Common Industry Names:** **Cast D2**, **Investment Cast D2**, **High-Chromium High-Carbon Cast Steel**. ## **3. Chemical Composition (Weight %, per ASTM A597 typical for CD-2)** The composition is carefully controlled to match wrought D2 performance, with particular attention to carbide formation and distribution in the cast state. | Element | Typical Range (%) | Role & Benefit in Cast D2 | |---------|------------------|----------------------------| | **Carbon (C)** | 1.40 – 1.60 | Essential for forming high-volume chromium carbides (Cr₇C₃). Controlled precisely to balance hardness and castability. | | **Chromium (Cr)** | 11.00 – 13.00 | **Primary carbide former.** Creates abundant hard carbides for extreme wear resistance. Provides moderate corrosion resistance. | | **Molybdenum (Mo)** | 0.70 – 1.20 | Enhances hardenability, improves toughness, and refines the cast microstructure. | | **Vanadium (V)** | 0.50 – 1.10 | Forms ultra-hard vanadium carbides (VC) for additional wear resistance and acts as a powerful grain refiner during solidification. | | **Manganese (Mn)** | 0.20 – 0.60 | Aids in deoxidation and hardenability. | | **Silicon (Si)** | 0.10 – 0.60 | Deoxidizer and solid solution strengthener. | | **Foundry Practice:** Employs **controlled solidification rates, grain refinement, and hot isostatic pressing (HIP)** to minimize segregation, reduce porosity, and ensure uniform carbide distribution throughout the cast structure. ## **4. Typical Physical & Mechanical Properties (Heat Treated)** * **As-Cast Condition:** Supplied in annealed or pre-machined condition (~200-250 HB). **Heat treatment is mandatory** to develop service properties. * **Recommended Heat Treatment:** Similar to wrought D2 but may require modified cycles for cast microstructure. * **Preheating:** **Critical.** Double preheat at ~650°C then ~850°C. * **Austenitizing:** 995-1025°C (1825-1880°F) in controlled atmosphere. * **Quenching:** **Air cool** (standard for minimal distortion). * **Tempering:** **Double or triple tempering mandatory** at 480-540°C (900-1000°F) for optimal toughness/hardness balance. * **Mechanical Properties (Hardened & Double Tempered):** * **Hardness:** **58 – 62+ HRC** (fully achievable, comparable to wrought D2). * **Ultimate Tensile Strength:** 1800 – 2100 MPa (261,000 – 305,000 psi) * **Compressive Strength:** **Exceptional** – Matches wrought D2's capability. * **Impact Toughness:** **Low to Moderate** – Inherent to D2 metallurgy. Properly processed cast D2 can match or slightly exceed wrought toughness in some orientations due to more isotropic grain structure. * **Wear/Abrasion Resistance:** **Outstanding** – The primary reason for selection. The high volume of chromium and vanadium carbides provides exceptional service life in abrasive environments. * **Dimensional Stability:** **Very Good** with air hardening, though complex shapes may require stress relief. * **Key Advantages of Cast Form:** * **Complex Geometry:** Enables monolithic tools with internal passages, contours, and integrated features impossible to machine. * **Large Component Capability:** Can produce very large wear parts (tons) beyond standard wrought billet sizes. * **Material & Cost Efficiency:** Dramatically reduces buy-to-fly ratio and rough machining hours for intricate parts. * **Rapid Prototyping:** Faster production of complex tooling prototypes. ## **5. Product Application** MTEK D2 Cast Tool Steel is specified for **large, complex, or customized wear-intensive components** where near-net-shape manufacturing offers significant advantages. * **Large Wear Parts & Liners:** * **Shot blast machine liners, classifier wheels, and wear plates** in mining and mineral processing. * **Pump casings, impellers, and valve components** for abrasive slurry service. * **Specialized Tooling & Dies:** * **Large blanking and forming die inserts** for automotive and appliance industries. * **Brick and ceramic extrusion dies** with complex profiles. * **Glass mold tooling and forming rolls.** * **Pulp & Paper Industry:** * **Refiner plates, digester fittings, and slitter knives.** * **Plastic Processing:** * **Extruder screws, barrels, and die plates** for filled/reinforced polymers. ## **6. Key Features & Advantages** * **Extreme Wear Resistance in Complex Forms:** Delivers D2's benchmark abrasion resistance in geometries unattainable via machining. * **Design Freedom:** Enables integrated cooling channels, lightweight structures, and part consolidation. * **Cost-Effective for Complex Shapes:** Reduces total manufacturing cost for intricate components through material and labor savings. * **Consistent Carbide Distribution:** Advanced foundry practices ensure uniform microstructure without the directional carbide banding sometimes seen in wrought material. * **Isotropic Properties:** The equiaxed as-cast grain structure can provide more uniform properties in all directions compared to wrought. * **Scalability:** Production capability from small intricate parts to multi-ton components. ## **7. Processing & Quality Considerations** * **Mandatory Heat Treatment:** As-cast material **must** undergo full AQT cycle for service properties. * **Non-Destructive Testing (NDT) is Critical:** * **Radiographic Inspection (X-ray):** Essential for detecting internal porosity or shrinkage. * **Liquid Penetrant Inspection:** For surface defect detection. * **Ultrasonic Testing:** For large sections to ensure internal soundness. * **Hot Isostatic Pressing (HIP):** Often employed to eliminate micro-porosity and improve mechanical properties, especially for highly stressed components. * **Finish Machining Required:** All critical surfaces and tolerances require post-heat-treatment machining (grinding, EDM) due to casting shrinkage and scale. * **Pattern & Gating Design:** Expertise required to ensure proper feeding and minimize defects in high-carbon, high-chromium alloys. **Summary:** MetalTek MTEK D2 Cast Tool Steel (UNS T90402) represents a sophisticated manufacturing solution that extends the application range of one of industry's most wear-resistant materials. By combining D2's formidable metallurgy with the geometric freedom of investment casting, it solves problems that neither conventional machining nor standard material forms can address. For applications requiring extreme abrasion resistance in large, complex, or integrated components—particularly in mining, mineral processing, and heavy industry—cast D2 provides a technically advanced and economically viable option. It enables engineers to design wear components that are not only durable but also optimized for function through internal features and complex contours, ultimately delivering superior performance and total cost savings over the component's service life. -:- For detailed product information, please contact sales. -: MetalTek MTEK D2 Cast UNS T90402 Tool Steel Specification Dimensions Size： Diameter 20-1000 mm Length <7067 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. -: MetalTek MTEK D2 Cast UNS T90402 Tool Steel Properties -:- For detailed product information, please contact sales. -:

Applications of MetalTek MTEK D2 Cast UNS T90402 Tool Steel -:- For detailed product information, please contact sales. -: Chemical Identifiers MetalTek MTEK D2 Cast UNS T90402 Tool Steel -:- For detailed product information, please contact sales. -:

Packing of MetalTek MTEK D2 Cast UNS T90402 Tool Steel -:- 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 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 3538 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