JIS SKD8 Hot Work Tool Steel Wire

JIS SKD8 Hot Work Tool Steel Wire Product Information -:- For detailed product information, please contact sales. -: JIS SKD8 Hot Work Tool Steel Wire Synonyms -:- For detailed product information, please contact sales. -:

JIS SKD8 Hot Work Tool Steel Product Information -:- For detailed product information, please contact sales. -: **Product Name:** JIS SKD8 Hot Work Tool Steel **International Standard:** JIS G4404 (Japan Industrial Standard) --- ### **1. Overview** JIS SKD8 is a tungsten‑chromium‑vanadium hot work tool steel characterized by its excellent **red hardness** and **high‑temperature strength**. Developed primarily for applications involving extreme thermal exposure, it retains hardness and resists softening at temperatures exceeding 600°C. Its alloy design also provides good resistance to thermal shock and moderate wear resistance, making it suitable for heavy‑duty hot‑work tooling. --- ### **2. Chemical Composition (Typical Weight %)** | Element | Content (%) | |---------|-------------| | C | 0.25–0.35 | | Si | 0.15–0.35 | | Mn | 0.15–0.45 | | Cr | 4.00–4.75 | | W | 4.50–5.50 | | V | 0.30–0.50 | | Mo | 0.30–0.50 | | P (max) | 0.030 | | S (max) | 0.020 | *Balance: Iron (Fe).* --- ### **3. Physical & Mechanical Properties** - **Density:** ~7.85 g/cm³ - **Thermal Conductivity:** ~28 W/m·K (at 20°C) - **Coefficient of Thermal Expansion:** ~12.0 ×10⁻⁶ /K (20–600°C) - **Hardness (Annealed):** ~217 HB - **Hardness (Hardened & Tempered):** 42–50 HRC (typical working range) - **Tempering Temperature Range:** 550–650°C - **Maximum Service Temperature:** ~650°C --- ### **4. Heat Treatment** - **Annealing:** Heat to 800–850°C, slow cool (~20°C/h) to 600°C, then air cool. - **Hardening:** Preheat at 800–850°C, austenitize at **1020–1080°C**, oil or air quench. - **Tempering:** Immediately temper at **550–650°C** for 2–3 hours; double tempering is recommended for dimensional stability. --- ### **5. Key Features** - **Superior Red Hardness:** Maintains hardness at very high temperatures due to tungsten and chromium content. - **Good Thermal Shock Resistance:** Suitable for tools subjected to rapid heating and cooling cycles. - **High‑Temperature Strength:** Resists deformation under heavy loads at elevated temperatures. - **Moderate Wear Resistance:** Suitable for abrasive hot‑work environments. --- ### **6. Typical Applications** SKD8 is used in demanding hot‑work processes where temperatures exceed those suitable for standard hot‑work steels: - **Hot Forging Dies:** For steel and alloy forgings (e.g., crankshafts, connecting rods). - **Die‑Casting Dies:** For high‑melting‑point alloys (e.g., brass, bronze, or large aluminum castings). - **Hot Extrusion Dies:** For steel or copper‑alloy extrusion. - **Hot‑Piercing Punches and Mandrels:** For piercing hot billets. - **Hot Shear Blades:** For cutting hot steel bars or billets. - **Glass‑Molding Tools:** For molds handling molten glass. --- ### **7. Equivalent Steel Grades (International Standards)** - **AISI/SAE (USA):** H19 (similar, but composition may vary) - **DIN (Germany):** 1.2601 / X30WCrV9-3 - **ISO:** 30WCrV9-3 - **GB (China):** 3Cr2W8V (closest equivalent, though W content differs) --- ### **8. Machining & Fabrication Notes** - **Machining:** Best performed in the annealed state; use carbide tools for optimal results. - **Grinding:** Use adequate cooling to prevent heat buildup and cracking. - **Welding:** Requires preheating (400–500°C) and post‑weld tempering; use matching electrodes. - **Surface Treatment:** Nitriding or hard‑facing can extend service life in abrasive applications. --- ### **9. Summary** JIS SKD8 is a high‑performance hot‑work tool steel designed for extreme‑temperature service. Its tungsten‑based composition provides exceptional hot hardness and thermal stability, making it a preferred choice for heavy‑duty forging, die‑casting, and extrusion tooling where thermal fatigue and high‑load conditions are critical. Conforming to JIS G4404, SKD8 ensures reliable performance in demanding industrial applications worldwide. -:- For detailed product information, please contact sales. -: JIS SKD8 Hot Work Tool Steel Specification Dimensions Size： Diameter 20-1000 mm Length <6806 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. -: JIS SKD8 Hot Work Tool Steel Properties -:- For detailed product information, please contact sales. -:

Applications of JIS SKD8 Hot Work Tool Steel Wire -:- For detailed product information, please contact sales. -: Chemical Identifiers JIS SKD8 Hot Work Tool Steel Wire -:- For detailed product information, please contact sales. -:

Packing of JIS SKD8 Hot Work Tool Steel Wire -:- 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 Wire 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 3277 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