Bohler-Uddeholm,BÖHLER W360 ISOBLOC® Hot Work Tool Steel Tube,Pipe

Bohler-Uddeholm BÖHLER W360 ISOBLOC® Hot Work Tool Steel Tube Product Information -:- For detailed product information, please contact sales. -: Bohler-Uddeholm BÖHLER W360 ISOBLOC® Hot Work Tool Steel Tube Synonyms -:- For detailed product information, please contact sales. -:

Bohler-Uddeholm BÖHLER W360 ISOBLOC® Hot Work Tool Steel Product Information -:- For detailed product information, please contact sales. -: # **Böhler-Uddeholm BÖHLER W360 ISOBLOC® Hot Work Tool Steel** ## **Product Overview** **BÖHLER W360 ISOBLOC®** is a premium **tungsten-molybdenum-vanadium alloyed hot work tool steel** manufactured under Böhler-Uddeholm's proprietary **ISOBLOC®** process. This advanced production technology ensures exceptional **microstructural homogeneity, minimized anisotropy, and superior dimensional stability** during heat treatment. Designed as a high-performance alternative to standard H13-type steels, W360 ISOBLOC® offers **enhanced high-temperature strength (red hardness), superior thermal fatigue resistance, and improved wear resistance at elevated temperatures**, making it ideal for demanding die-casting, extrusion, and forging applications operating under severe thermal and mechanical stress conditions. --- ## **1. Key Characteristics & Advantages** * **Exceptional High-Temperature Strength:** Superior red hardness compared to H13, maintaining mechanical properties at temperatures up to 650°C (1200°F). * **Outstanding Thermal Fatigue Resistance:** Excellent resistance to heat checking and thermal cracking under cyclic heating and cooling conditions. * **Superior Wear Resistance at Elevated Temperatures:** Enhanced resistance to erosion, soldering, and abrasive wear in die-casting and hot forming applications. * **High Thermal Conductivity:** Better heat dissipation than H13-type steels, reducing thermal gradients and stress concentrations within the tool. * **Excellent Toughness:** Maintains good impact resistance at both room and elevated temperatures despite its high hot strength. * **Minimized Anisotropy:** The ISOBLOC® process ensures uniform properties in all directions, providing predictable dimensional changes during heat treatment. * **Good Dimensional Stability:** Reduced distortion during heat treatment, crucial for maintaining precision in complex tool geometries. --- ## **2. Typical Chemical Composition (Weight %)** | Element | Carbon (C) | Tungsten (W) | Molybdenum (Mo) | Chromium (Cr) | Vanadium (V) | Silicon (Si) | | :--- | :---: | :---: | :---: | :---: | :---: | :---: | | **Content** | **0.35 - 0.42** | **9.00 - 10.00** | **2.80 - 3.50** | **2.50 - 3.50** | **0.40 - 0.70** | **0.80 - 1.20** | **Alloying Rationale:** * **Tungsten (9.5%):** Primary contributor to red hardness and high-temperature strength through solid solution strengthening and stable carbide formation. * **Molybdenum (3.2%):** Enhances hardenability, improves toughness, and contributes to secondary hardening at elevated temperatures. * **Chromium (3.0%):** Provides oxidation resistance and hardenability. * **Vanadium (0.55%):** Forms stable carbides that increase wear resistance and refine grain structure. * **Silicon (1.0%):** Improves oxidation resistance and strengthens the ferrite matrix. * **ISOBLOC® Process:** Ensures a fine, uniform carbide distribution throughout the microstructure, eliminating directional weaknesses and enhancing thermal fatigue resistance. --- ## **3. Physical & Mechanical Properties** ### **Physical Properties:** * **Density:** ~8.30 g/cm³ * **Thermal Conductivity:** ~32 W/(m·K) at 20°C (higher than H13) * **Modulus of Elasticity:** ~215 GPa * **Coefficient of Thermal Expansion:** ~11.2 × 10⁻⁶/K (20-500°C) * **Specific Heat Capacity:** ~450 J/(kg·K) ### **Heat Treatment & Mechanical Data:** * **Annealed Hardness:** ~220 HBW * **Austenitizing Temperature:** 1080 - 1130°C (1975 - 2070°F) * **Quenching Medium:** Air (forced air for sections >75mm) or oil (for complex shapes) * **Tempering:** **Double tempering essential.** Temperature range: 560 - 650°C (1040 - 1200°F) * **Typical Working Hardness:** * **46-50 HRC** (tempered at 580-620°C): Optimal balance for aluminum/magnesium die-casting * **50-54 HRC** (tempered at 560-590°C): For hot extrusion, forging, and high-stress applications * **Hot Hardness Performance:** Maintains ~45 HRC at 600°C (significantly higher than H13) * **Impact Toughness:** Typically 25-35 J (Charpy U-notch) at 48 HRC * **Thermal Fatigue Resistance:** Superior to H13-type steels, with delayed heat check initiation and propagation --- ## **4. Primary Applications** W360 ISOBLOC® is engineered for demanding hot work applications requiring enhanced high-temperature performance: * **High-Pressure Die-Casting:** * Cavities, cores, and inserts for aluminum and magnesium automotive components * Particularly suitable for thick-section castings and high melting temperature alloys * Nozzles, shot sleeves, and other components exposed to severe thermal shock * **Hot Extrusion Tools:** * Dies, mandrels, and containers for aluminum, copper, and brass extrusion * Tooling for high-temperature steel extrusion * **Hot Forging Dies:** * Dies and inserts for precision forging of high-temperature alloys * *Hammer and press forging tools requiring extended service life* * **Press Hardening (Hot Stamping):** * Tools for forming ultra-high-strength boron steels * **Glass Molding Tools:** * Components for glass container manufacturing * **Specialty Applications:** * Tools for isothermal forging and superplastic forming * Hot work applications where H13 exhibits premature softening or wear --- ## **5. Relevant International Standards & Comparable Grades** W360 ISOBLOC® corresponds to several international standards for tungsten-based hot work steels: | Standard | Grade / Designation | Similarity / Note | | :--- | :--- | :--- | | **AISI / ASTM A681** | **H23** | Close equivalent; W360 ISOBLOC® represents premium quality with enhanced properties | | **DIN / Werkstoff** | **1.2606 (X30WCrV9-3)** | Similar tungsten-chromium hot work steel grade | | **JIS G4404** | **SKD5** | Japanese equivalent tungsten hot work steel | | **ISO 4957** | **X30WCrV9** | International standard designation | | **GB/T 1299** | **3Cr2W8V** | Traditional Chinese tungsten hot work steel | | **Other Premium Grades** | **H19, H21** | Similar tungsten-based hot work steels with varying alloy balances | **Quality Distinction:** The **ISOBLOC®** designation guarantees superior internal quality, homogeneity, and minimized directional properties compared to standard hot work steel materials. --- ## **6. Processing & Fabrication Guidelines** ### **Material Preparation:** * **Available Forms:** Forged blocks, rounds, and custom pre-machined shapes * **Certification:** Supplied with comprehensive material certification including chemical analysis and mechanical properties ### **Machining:** * **Annealed State:** Good machinability using carbide tools * **Rough Machining:** Leave 1-2mm allowance for finishing after heat treatment * **Stress Relieving:** Recommended after rough machining at 600-650°C ### **Heat Treatment Protocol:** 1. **Preheating:** Critical due to high alloy content. Dual stage: 600-650°C and 850-900°C 2. **Austenitizing:** 1100-1120°C in vacuum or controlled atmosphere furnace 3. **Quenching:** Air cooling standard; forced air for sections >100mm 4. **Tempering:** **Immediate double tempering** after reaching 40-50°C * First temper: 2 hours minimum * Second temper: 2 hours minimum after cooling to room temperature ### **Surface Enhancement:** * **Nitriding:** Highly recommended (gas, plasma, or salt bath) * Surface hardness: 1000-1200 HV * Significantly improves solder resistance in die-casting applications * **PVD Coatings:** TiAlN, AlCrN for specific high-wear applications * **Oxidation Protection:** Can be steam oxidized for improved lubricant retention ### **Welding & Repair:** * **Filler Material:** Use matching or slightly softer hot work steel filler * **Pre-heat:** 400-500°C * **Post-Weld:** Complete re-hardening and tempering recommended for critical applications ### **Quality Control:** * **Hardness Verification:** Check multiple locations to ensure uniformity * **Dimensional Control:** Account for ~0.15% growth during heat treatment * **Surface Inspection:** Penetrant testing recommended after final machining --- ## **7. Technical Comparison with H13** | Property | W360 ISOBLOC® | Standard H13 | Advantage | | :--- | :---: | :---: | :--- | | **Red Hardness (600°C)** | ~45 HRC | ~35 HRC | **Superior** | | **Thermal Conductivity** | ~32 W/m·K | ~28 W/m·K | **Better** | | **Wear Resistance** | High | Moderate | **Superior** | | **Toughness** | Good | Very Good | H13 Advantage | | **Thermal Fatigue** | Excellent | Very Good | **Superior** | | **Maximum Service Temp** | ~650°C | ~600°C | **Higher** | --- ## **8. Conclusion** **BÖHLER W360 ISOBLOC®** represents a **high-performance tungsten-based hot work tool steel** that bridges the gap between conventional H13-type steels and more specialized high-temperature alloys. Its enhanced red hardness, superior thermal conductivity, and excellent thermal fatigue resistance make it particularly valuable for applications where H13 exhibits premature softening, excessive wear, or inadequate thermal fatigue resistance. The **ISOBLOC®** manufacturing process ensures that these enhanced properties are delivered with the consistency and reliability required for critical production tooling. For die-casters working with challenging alloys or thick-section components, extruders pushing productivity limits, and forgers operating at elevated temperatures, W360 ISOBLOC® offers a proven solution for extending tool life, improving process stability, and reducing total tooling costs. While requiring careful heat treatment due to its high alloy content, the performance benefits of W360 ISOBLOC® justify its selection for applications demanding the ultimate in high-temperature performance and thermal fatigue resistance. -:- For detailed product information, please contact sales. -: Bohler-Uddeholm BÖHLER W360 ISOBLOC® Hot Work Tool Steel Specification Dimensions Size： Diameter 20-1000 mm Length <6898 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. -: Bohler-Uddeholm BÖHLER W360 ISOBLOC® Hot Work Tool Steel Properties -:- For detailed product information, please contact sales. -:

Applications of Bohler-Uddeholm BÖHLER W360 ISOBLOC® Hot Work Tool Steel Tube -:- For detailed product information, please contact sales. -: Chemical Identifiers Bohler-Uddeholm BÖHLER W360 ISOBLOC® Hot Work Tool Steel Tube -:- For detailed product information, please contact sales. -:

Packing of Bohler-Uddeholm BÖHLER W360 ISOBLOC® Hot Work Tool 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 3369 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