D7 Cold work tool steel bar is a type of high-carbon, high-chromium tool steel (ASTM D7, UNS T30407) known for its exceptional hardness and wear resistance, primarily used for demanding cold work applications like cutting tools and dies.
D7 Tool Steel bar is air-hardenable and has a high resistance to abrasion due to its composition, making it ideal for manufacturing components such as blanking, shearing, and forming tools.
D7 cold work tool steel bar stands out in applications where high wear resistance and toughness are a must. Known for its excellent hardness after heat treatment, it’s a reliable material for cutting tools, molds, and dies.
With its ability to hold up under pressure and resist wear, D7 is the perfect choice for industries demanding durability and precision. In this article, we’ll dive into its key properties, fabrication processes, and where D7 steel truly shines in real-world applications.
D7 Tool Steel bar is a carbon-heavy, chromium-rich air-hardenable tool steel, providing superior resistance to wear and strength thanks to its 2.0% carbon and 12% chromium composition. This gives it superior hardness (80-85 HRC after heat treatment).
It’s mainly used for cutting tools, dies, and molds in cold work applications. D7 is processed by forging and rolling and requires no oil or water quenching, making it ideal for industries needing durable, long-lasting tools.
Chemical Composition of D7 Tool Steel Bar
| елемент | Content (%) |
| Carbon, C | 2 |
| Manganese, Mn | 0.3 |
| Chromium, Cr | 12 |
| Molybdenum, Mo | 0.5 |
| Vanadium, V | 0.1 |
| Silicon, Si | 0.25 |
| Phosphorus, P | 0.03 |
| Sulfur, S | 0.03 |
Physical Properties of D7 Tool Steel
| Собственост | Metric | Imperial |
| Machinability | добре | добре |
| Плътност | 7.85 g/cm³ | 0.284 lb/in³ |
| Specific Heat Capacity | 0.480 J/g·°C | 0.115 BTU/lb·°F |
| Топлопроводимост | 25 W/m·K | 17.2 BTU/hr·ft·°F |
| Coefficient of Thermal Expansion | 11.2 µm/m·°C | 6.22 µin/in·°F |
Due to its excellent wear resistance and toughness, D7 Cold Work Steel is available in various shapes to meet different needs:
- D7 Steel Sheets – Ideal for die cutting, stamping, and forming.
- D7 Steel Plates – Perfect for large-scale tool and die manufacturing.
- D7 Steel Bars – Suitable for machining into custom shapes.
- D7 Steel Rods – Great for producing precision tools and components.
- D7 Steel Forgings – Ideal for high-strength applications and heavy-duty tools.
AISI D7 Cold Work Tool Steel is designed for tough environments that demand high wear resistance and durability. It’s widely used in various industries for producing reliable, long-lasting tools:
- Tooling: Die cutting tools, punches, forming dies, stamping dies
- Molds: Plastic injection molds, compression molds, extrusion dies
- Cutting Tools: Blades, knives, saws
- Космонавтика: Structural components, precision tools
- Automotive: Dies for manufacturing parts, punching tools
D7 steel is the go-to choice for high-performance tools in demanding conditions.
As a D7 tool steel manufacturer, we Top Metal can provide a wide range of shapes and sizes, from precision-ground plates to custom-forged parts, tailored to meet the specific demands of your application.
Our D7 steel products undergo rigorous heat treatment processes to ensure optimal performance and durability in high-stress environments, making them perfect for industries where long tool life and consistent performance are critical.