M300 Tool Steel

What is M300 tool steel?

Böhler M300 is a high-chromium martensitic stainless plastic tool steel, characterized by the combination of excellent corrosion resistance, high polishing performance, outstanding machinability and high toughness. It is suitable for scenarios with severe chemical erosion such as injection molding, blow molding and plastic extrusion molds. The pre-hardened state of the product is conducive to direct use. Its outstanding performance and compatibility with standards from multiple countries make it have extensive application value in the plastic mold industry.

What are the specifications of M300 tool steel?

What are the Equivalent Grades of M300 Tool Steel?

What is the Chemical Composition of M300 Tool Steel?

What are the Customized Options of M300 Tool Steel ?

1. Custom Chemical Composition: Capable of producing standard grades such as GB, DIN, ASTM, JIS, etc. Chemical composition can be custom-produced individually.
2. Custom Specifications: Round steel (diameter) and plates (thickness, width) can be custom-produced.
3. Professional packaging for long-term storage or extreme transportation conditions: Including black paint spraying on all sides, plastic film wrapping, anti-rust oil spraying, and delivery in wooden cases.
4. Custom production according to samples or technical agreements.
5. M300 Tool Steel Electroslag Remelting (M300 ESR): Premium option with higher purity and isotropic properties for critical applications.

What is the Smelting process of M300 Tool Steel ?

M300 Tool Steel Physical properties

1. Density: approximately 7.7 kg/dm³.
2. Thermal conductivity: approximately 15 W/(m·K) @20 °C.
3. Specific heat: approximately 430 J/(kg·K).
4. Resistivity: approximately 0.8 Ω·mm²/m.
5. Elastic modulus: approximately 223  gp@20  °C, slightly decreasing with rising temperature.
6. Coefficient of thermal expansion: approximately 10.4-11.6×10⁻⁶ m/m·K within the range of 20 °C - 300 °C.

Other properties: extremely high machinability, good polishing property, excellent dimensional stability, pre-hardened state provides high toughness and corrosion resistance, no need for further heat treatment.

M300 Tool Steel Typical application fields

1. Highly corrosive plastic molds (PVC, food-grade plastic).
2. Injection molds, blow molding molds, high-gloss molds (hot runner systems).
3. Plastic extrusion cylinders and screws, packaging, food and electronics industry equipment.
4. General mechanical parts (module plates, pins, fixtures, etc.) are required to be corrosion-resistant, easy to process or in high-cleanliness environments.