In order to produce high-quality plastic components, plastic mould steel is essential. The quality of steel utilized has a significant impact in every industry. From automotive parts to consumer packaging, the performance of a plastic mould depends heavily on the quality of steel used. In this article, we explain what plastic mold steel is, its key properties, popular grades, and how to choose the right one for your application.

What Is Plastic Mould Steel?
Plastic mould steel is an essential material in the manufacturing of moulds for plastic injection and die-casting processes. It is used to manufacture plastic injection moulds, blow moulds, and compression moulds. Unlike regular steel, mould steel is engineered to handle pressure, heat, and repeated use while maintaining accuracy. These steels are made to provide good surface quality, outstanding machinability, and reliable performance over long production cycles.

Essential Properties of Plastic Mould Steel
High-quality plastic mould steel provides some significant benefits:
Good machinability for faster mould manufacturing
High polishability to achieve smooth plastic surfaces
Good wear resistance for long tool life
Corrosion resistance (in selected grades)

These properties ensure consistent mould performance and reduce maintenance costs.

Common Plastic Mould Steel Grades
Some widely used mould steel grades include:
W.NR. 1.2311, W.NR. 1.2312, W.NR. 1.2738, W.NR. 1.2738HH, W.NR. 1.2083, W.NR. 1.2083ESR, W.NR. 1.2085, W.NR. 1.2316, W.NR. 1.2316HH, VR300

Important Grades:

  • W.Nr. 1.2311 (P20) – Pre-hardened steel with good machinability and polishability
  • W.Nr. 1.2738 – Improved toughness and uniform hardness, ideal for large moulds
    Each grade is chosen based on mould size, surface finish requirements, and production volume.

    Industry Applications
    Plastic mould steel is commonly used in:

  • Packaging and container moulds
  • Medical and pharmaceutical products
  • Household plastic items
  • Plastic Mould Industry
  • Mould Frames
  • Machine Tool Engg
  • Die Casting Industry
  • Mould Parts
  • Preform Diess

    Reliable mould steel ensures smooth production and consistent part quality.

    Plastic Mould Steel Range Offered by Sandeep Edgetech
    Sandeep Edgetech is the leading supplier, manufacturer, and distributor of high-quality plastic mould steel in India and abroad as well. We offer a premium range of plastic mould steel in various grades, sizes, and finishes. Our steels are sourced and processed to meet industry standards, ensuring durability, precision, and long-term performance.

    Looking for the right mould steel grade? Contact Sandeep Edgetech for expert support and reliable steel solutions.