Crucible Steel WR-95 Tool Steel, AISI H10 Modified

Crucible Steel WR-95 Tool Steel, AISI H10 Modified Product Information -:- For detailed product information, please contact sales. -: Crucible Steel WR-95 Tool Steel, AISI H10 Modified Synonyms -:- For detailed product information, please contact sales. -:

Crucible Steel WR-95 Tool Steel, AISI H10 Modified Product Information -:- For detailed product information, please contact sales. -: # **Product Introduction: Crucible Steel WR-95® (Modified AISI H10) Tool Steel** Crucible Steel WR-95® is a premium, air-hardening, hot work tool steel representing a technologically advanced modification of the classic AISI H10 (H10A) specification. The "WR" designation signifies its optimization for **Wear Resistance**, while the "95" may reference a targeted property or performance tier. This grade is engineered to address the core challenge in many hot work applications: balancing exceptional thermal fatigue resistance with significantly improved **room-temperature and elevated-temperature wear resistance**, a limitation of the more traditional H13 steel. By modifying the base H10 chemistry—typically increasing carbon, vanadium, and molybdenum—WR-95 achieves a higher volume of stable, hard carbides (primarily vanadium carbides) within a tough, chromium-rich matrix. This results in a material that retains the **good hot hardness and thermal shock resistance** of hot work steels while offering **dramatically enhanced resistance to abrasive wear, erosive wear, and soldering/galling**. WR-95 is the strategic choice for die casting, extrusion, and forging applications where die life is limited by erosive or abrasive wear rather than solely by heat checking. --- ## **1. Chemical Composition (Weight %)** WR-95 builds upon the H10 foundation with strategic enhancements for wear performance. | **Element** | **Carbon (C)** | **Chromium (Cr)** | **Molybdenum (Mo)** | **Vanadium (V)** | **Tungsten (W)** | **Silicon (Si)** | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | | **Content** | **0.40 - 0.50** | **3.00 - 4.00** | **2.50 - 3.50** | **0.40 - 0.60** | **~2.75** | **0.80 - 1.20** | | **Role** | Increased from standard H10 (~0.35%). Provides greater base for carbide formation, enhancing hardness and wear resistance while maintaining good toughness. | Provides hardenability and oxidation/hot corrosion resistance. Slightly lower than H13 to balance with tungsten/molybdenum. | Significantly increased from H10. Enhances hardenability, hot strength, temper resistance, and contributes to secondary hardening. | Slightly elevated. Forms fine vanadium carbides that improve wear resistance and grain refinement at elevated temperatures. | **Key differentiator from H13.** Present in meaningful quantities to provide solid solution strengthening and excellent hot hardness. | Improves oxidation resistance and provides solid solution strengthening at high temperatures. | *Note: Iron (Fe) constitutes the remainder. This tungsten-molybdenum-vanadium balance is the hallmark of the H10/H19 family, optimized here for wear.* --- ## **2. Physical & Mechanical Properties** *Typical properties after heat treatment to a common hot work hardness of 44-50 HRC. Designed for service at 540-650°C (1000-1200°F).* * **Density:** ~8.0 g/cm³ (slightly higher than H13 due to tungsten) * **Modulus of Elasticity:** ~210 GPa (30.5 x 10⁶ psi) * **Thermal Conductivity:** Moderate to good. * **Hot Hardness (Red Hardness):** **Excellent.** Superior to H13, especially above 600°C (1110°F), due to tungsten and molybdenum content. Maintains load-bearing capacity at high operating temperatures. * **Temper Resistance:** **Outstanding.** Highly resistant to softening during prolonged exposure to operating temperatures. * **Thermal Fatigue Resistance:** **Very Good.** While slightly less tough than H13, its balanced composition still provides good resistance to heat-check cracking. The wear resistance often extends overall die life by preventing the erosive wear that can initiate cracks. * **Wear & Erosion Resistance:** **Excellent (for a hot work steel).** The primary advantage. Its higher carbide content provides significantly better resistance to washing, erosion, and abrasion from molten metal flow or forging scale compared to H13. * **Toughness:** **Good.** Lower than H13 but still sufficient for most hot work applications. Proper die design and heat treatment are key to managing thermal and mechanical shock. * **Machinability (Annealed):** Fair, more challenging than H13 due to higher alloy content. --- ## **3. Heat Treatment** Heat treatment follows principles similar to other high-hot-hardness steels like H19. * **Annealing:** Heat to 870-900°C (1600-1650°F), slow cool. Annealed hardness: 220-250 HB. * **Stress Relieving:** 650-700°C (1200-1290°F), hold, slow cool. * **Preheating:** **Critical.** Double preheat: 540-650°C (1000-1200°F), then 815-870°C (1500-1600°F). * **Austenitizing:** **1040-1095°C (1900-2000°F).** A common range is **1065-1080°C (1950-1975°F)**. Higher temperatures maximize hot hardness and wear resistance. * **Quenching:** **Air quench** or high-pressure gas quench. * **Tempering:** **Mandatory Double/Triple Temper.** Temper immediately. **Two to three tempers** at **565-620°C (1050-1150°F)**, each for 2+ hours. Tempering **must** be above 540°C (1000°F) to develop proper toughness and secondary hardness. * **Stress Equalizing:** Often recommended after rough machining and before finishing. --- ## **4. Key Applications** WR-95 is specified for hot work applications where wear, erosion, or metal soldering are the dominant failure modes. * **Aluminum Die Casting:** Shot sleeves, nozzles, gooseneck liners, and high-wear areas of cores and cavities, especially for high-silicon aluminum alloys. * **Brass and Bronze Forging/Extrusion:** Dies and mandrels where high temperatures and abrasive oxides cause rapid wear. * **Hot Extrusion Dies (Steel & Non-Ferrous):** For extruding highly abrasive materials or where long runs are required. * **Forging Dies for Abrasive Steels:** Dies for forging high-temperature alloys or steels that form tenacious scale. * **Tooling for Abrasive Plastics:** Molds for glass or mineral-filled engineering plastics that generate heat and wear. --- ## **5. International Standards & Cross-References** WR-95 is a proprietary modified grade based on the AISI H10/H19 family. * **AISI/SAE:** **Modified H10 / H19 Type** * **UNS:** T20810 (as a base H10 reference) * **European (EN):** Conceptually similar to **1.2365** or modified **1.2885** grades, which are tungsten-bearing hot work steels. * **Japanese (JIS):** **SKD8** or **SKD62** (modified) are in the same performance category. * **Common Industry Equivalents:** Often compared to other proprietary tungsten hot work steels like **Uddeholm VIDAR 1 (H19)**, **Böhler W321**, or **Thyssenkrupp GS-379**. --- ## **6. Advantages & Limitations** **Advantages:** * **Superior Wear & Erosion Resistance:** Extends die life significantly in abrasive hot work environments compared to H13. * **Excellent Hot Hardness & Temper Resistance:** Maintains performance at very high operating temperatures. * **Good Balance of Properties:** Offers a better wear/thermal fatigue balance than moving to a pure cold work steel for hot applications. * **Resistance to Soldering/Galling:** Beneficial in aluminum die casting. **Limitations:** * **Higher Cost:** More expensive than H13 due to higher alloy content (W, Mo, V). * **Lower Toughness than H13:** More sensitive to thermal and mechanical shock; requires more careful die design and process control. * **More Difficult to Machine & EDM:** Increased alloy content and hardness affect machinability. * **Complex Heat Treatment:** Requires higher austenitizing temperatures and precise control. --- ## **7. Summary** **Crucible Steel WR-95® is a purpose-engineered hot work steel that shifts the performance paradigm from solely resisting heat checking to also aggressively combating wear.** It is the material of choice when H13 dies fail prematurely from erosion, washing, or abrasive wear rather than from a network of heat checks. By incorporating the hot hardness of tungsten with enhanced carbide formers, WR-95 delivers extended service life in the most punishing hot work applications involving abrasive metals or high pressures. For die casters and forgers looking to maximize production runs, reduce downtime for die repair/refurbishment, and tackle more challenging alloys, WR-95 provides a technologically advanced and cost-effective solution that bridges the gap between general-purpose hot work steels and specialized, wear-resistant alloys. -:- For detailed product information, please contact sales. -: Crucible Steel WR-95 Tool Steel, AISI H10 Modified Specification Dimensions Size： Diameter 20-1000 mm Length <6992 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. -: Crucible Steel WR-95 Tool Steel, AISI H10 Modified Properties -:- For detailed product information, please contact sales. -:

Applications of Crucible Steel WR-95 Tool Steel, AISI H10 Modified -:- For detailed product information, please contact sales. -: Chemical Identifiers Crucible Steel WR-95 Tool Steel, AISI H10 Modified -:- For detailed product information, please contact sales. -:

Packing of Crucible Steel WR-95 Tool Steel, AISI H10 Modified -:- 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 3463 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