JIS SKD7 Hot Work Tool Steel Wire

JIS SKD7 Hot Work Tool Steel Wire Product Information -:- For detailed product information, please contact sales. -: JIS SKD7 Hot Work Tool Steel Wire Synonyms -:- For detailed product information, please contact sales. -:

JIS SKD7 Hot Work Tool Steel Product Information -:- For detailed product information, please contact sales. -: **Product Name:** JIS SKD7 Hot Work Tool Steel **International Standard:** JIS G4404 (Japan Industrial Standard) --- ### **1. Overview** JIS SKD7 is a chromium-molybdenum‑vanadium hot work tool steel designed for high‑temperature applications. It exhibits excellent red hardness, thermal fatigue resistance, and wear resistance, making it suitable for prolonged use under severe thermal cycling and abrasive conditions. The steel retains high hardness and strength at elevated temperatures (up to ~600°C), ensuring long service life in hot‑forming processes. --- ### **2. Chemical Composition (Typical Weight %)** | Element | Content (%) | |---------|-------------| | C | 0.32–0.42 | | Si | 0.80–1.20 | | Mn | 0.20–0.50 | | Cr | 4.50–5.50 | | Mo | 1.00–1.50 | | V | 0.30–0.50 | | P (max) | 0.030 | | S (max) | 0.020 | *Note: Balance is Iron (Fe).* --- ### **3. Physical & Mechanical Properties** - **Density:** 7.80 g/cm³ - **Thermal Conductivity:** ~30 W/m·K (at 20°C) - **Coefficient of Thermal Expansion:** 11.5 ×10⁻⁶ /K (20–600°C) - **Hardness (Annealed):** ~229 HB - **Hardness (Hardened & Tempered):** 40–52 HRC (typical working hardness) - **Tempering Temperature Range:** 550–650°C - **Maximum Service Temperature:** ~600°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, then austenitize at **1000–1050°C**, oil or air quench. - **Tempering:** Immediately after quenching, temper at **550–650°C** (2–3 hours, double tempering recommended). --- ### **5. Key Features** - **Excellent Red Hardness:** Maintains hardness and strength at high temperatures. - **Good Thermal Fatigue Resistance:** Resists cracking under repeated heating‑cooling cycles. - **High Wear Resistance:** Suitable for abrasive environments. - **Moderate Toughness:** Balanced resistance to thermal shock and mechanical stress. --- ### **6. Typical Applications** SKD7 is widely used in hot‑work tooling, including: - **Die‑Casting Dies:** For aluminum, magnesium, and zinc alloys. - **Hot Forging Dies:** For automotive parts, hardware, and machinery components. - **Hot Stamping Tools:** For high‑temperature forming and punching. - **Extrusion Dies:** For non‑ferrous metals (e.g., aluminum, copper). - **Hot Shear Blades:** For cutting hot billets or bars. - **Plastic Molding Tools:** For high‑temperature engineering plastics. --- ### **7. Equivalent Steel Grades (International Standards)** - **AISI/SAE (USA):** H12 Mod. - **DIN (Germany):** 1.2606 - **ISO:** 35CrMoV5 - **GB (China):** 4Cr5MoSiV1 (similar) --- ### **8. Machining & Fabrication Notes** - **Machining:** Perform in annealed condition; use carbide tools for better finish. - **Grinding:** Use soft wheels and adequate cooling to avoid overheating. - **Welding:** Preheating (400–450°C) and post‑weld tempering are required. - **Surface Treatment:** Nitriding or CVD/PVD coatings can further enhance wear resistance. --- ### **9. Summary** JIS SKD7 is a versatile hot work tool steel offering a balanced combination of high‑temperature strength, thermal fatigue resistance, and wear resistance. Its composition and heat‑treatment response make it a reliable choice for demanding hot‑forming applications in die‑casting, forging, and extrusion industries. Compliance with JIS G4404 ensures consistent quality and performance in global tooling markets. -:- For detailed product information, please contact sales. -: JIS SKD7 Hot Work Tool Steel Specification Dimensions Size： Diameter 20-1000 mm Length <6805 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 SKD7 Hot Work Tool Steel Properties -:- For detailed product information, please contact sales. -:

Applications of JIS SKD7 Hot Work Tool Steel Wire -:- For detailed product information, please contact sales. -: Chemical Identifiers JIS SKD7 Hot Work Tool Steel Wire -:- For detailed product information, please contact sales. -:

Packing of JIS SKD7 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 3276 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