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Tool Steel D2
Material Type
Metal
Material Name
Tool Steel D2
Alternative Names
1.2379 | X153CrMoV12 | X155CrVMo12-1 | T30402
Process Compatibility
CNC Milling, CNC Turning
introduction
Tool Steel D2 in CNC Machining
Tool steel D2 is a high-carbon, high-chromium, air-hardening steel with excellent wear resistance, high compressive strength, and good toughness.
It's commonly used to manufacture cutting tools, dies, punches, and other high-strength components. When machining tool steel D2, we choose carbide tools specifically designed for cutting hardened steel. We ensure proper cooling with suitable coolant or lubricant to dissipate heat during machining and to improve tool life. We adjust cutting speeds and feeds to find the right balance between material removal rates and tool life.
For superior results, we consider secondary processes like grinding or EDM to achieve tight tolerances and excellent surface finishes. If post-machining heat treatment is needed, we plan for potential dimensional changes during the process. D2’s hardness ranges from 55-62 HRC when heat treated, and it is easy to machine in the annealed condition. When hardened correctly, D2 has only minimal distortion. The high chromium content in D2 steel provides mild corrosion resistance when in a hardened state.
Properties
Properties Table of Tool Steel D2
| MECHANICAL PROPERTIES | |
|---|---|
| Ultimate Tensile Strength | 758-860 MPa |
| Yield Strength | 420-470 MPa |
| Young's Modulus(Elasticity) | 190 GPa |
| Elongation at Break | 16% |
| Physical Properties | |
| Magnetism | Magnetic |
| UV Resistance | Limited UV resistance |
| Weldability | Poor |
| Thermal Properties | |
| Maximum Service Temperature | 195-245°C |
| Thermal Expansion Coefficient | 10.3-12 x 10^-6/°C |
| Thermal Conductivity | 29.3-31.7 W/(m·°C) |
| Electrical Properties | |
| Electrical Resistivity | 65-70 μΩ*cm |
TECHNOLOGY OVERVIEW
Basic Knowledge of Tool Steel D2
What is Tool Steel D2?
Tool Steel D2, called D2 steel, is part of the cold-work tool steels category primarily used to produce cutting tools and dies. Its composition typically includes carbon, chromium, molybdenum, and optional elements like vanadium. D2 steel retains a sharp cutting edge for extended periods because of its exceptional wear resistance and hardness.
Its air-hardening property means it achieves hardness through air cooling, eliminating the need for oil or water quenching during heat treatment. While D2 steel excels in wear resistance, it requires proper maintenance to prevent corrosion, and its toughness may be lower compared to some alternatives.
Advantages of Tool Steel D2
High Wear Resistance
Good Toughness
Good Dimensional Stability
High Hardness
Good Machinability
Resistance to Deformation
Versatility
Maintains a sharp cutting edge over time
Applications of Tool Steel D2
Cutting dies
Threading dies
Shear blades
Extrusion dies
Thread rolling dies
Drawing dies
Blanking tools
Forming tools
FAQ
Machining Tool Steel D2 Buying FAQ
Yes, D2 tool steel is commonly used for knife blades. It is a high-carbon, high-chromium tool steel known for its excellent wear resistance, hardness, and edge retention.
D2 steel is not considered stainless steel and contains a high amount of carbon. While it has good corrosion resistance compared to many other tool steels, it is not entirely rust-resistant. Proper care, such as regular cleaning and oiling, is recommended to prevent rusting.
D2 tool steel has high hardness, contributing to excellent edge retention. However, this hardness can make it more challenging to sharpen than some other steels. While sharpening may take more effort, the resulting edge can be very durable.
Both are high-carbon, high-chromium tool steels, but they have differences in composition and properties. D2 steel has excellent wear resistance and edge retention, making it suitable for cutting tools and knife blades. D3 steel, on the other hand, is often chosen for applications where toughness and shock resistance are important, such as in forming dies. The "better" steel depends on the specific needs of the project or product.
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