Hardness Difference: 1.2311 vs P20 vs 1.2738 Plastic Mold ...

Comparative Hardness: 1.2311, P20, and 1.2738 for Plastic Molds

In the realm of molding technology, selecting the appropriate plastic mold steel is vital. The longevity and effectiveness of molds are reliant on the right steel's hardness. Here, we will explore the hardness characteristics of three prevalent types of plastic mold steel: 1.2311, P20, and 1.2738.

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Understanding Plastic Mold Steels

Definition and Purpose

Plastic mold steel refers to a specialized variety of tool steel formulated for the injection molding process. These steels are characterized by specific properties such as hardness, thermal stability, and resistance to wear, which are essential for successful molding operations.

Significance of Hardness

Hardness is a pivotal property of mold steels as it significantly influences a mold's capability to endure the stress of injection molding while maintaining wear resistance throughout its life cycle. Choosing a harder steel often results in an extended service period; however, balancing hardness with toughness and machinability is equally important.

In-Depth Analysis: 1.2311, P20, and 1.2738

Diving into DIN 1.2311 Plastic Mold Steel

Overview and Characteristics

The 1.2311 steel stands out as a favored pre-hardened mold steel, lauded for its excellent mixture of toughness, hardness, and thermal stability.

Hardness Profile and Attributes

This type typically ranges from 28 to 32 HRC in hardness, which provides substantial wear resistance suitable for medium-sized molds.

Examining ASTM P20 Plastic Mold Steel

General Overview

P20 steel is one of the most utilized plastic mold steels available. Its pre-hardened nature allows it to be employed without the need for further heat treatment, thereby offering time and cost efficiencies.

Hardness and Features

P20 generally exhibits a hardness range of 28 to 34 HRC. Its superior polishability makes it an excellent choice for molds needing a high-quality surface finish.

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Insights on DIN 1.2738 Plastic Mold Steel

Overview and Benefits

The 1.2738 steel represents an advanced alternative to P20, featuring additional nickel which enhances both hardness and polishability.

Hardness Metrics and Properties

It offers a hardness range of 33 to 37 HRC, rendering it harder than both 1.2311 and P20, making it perfectly suited for larger molds or those anticipated to have prolonged usage.

Choosing the Right Plastic Mold Steel

Recommendations for Molding Applications

• 1.2311: Optimal for medium-sized molds.
• P20: Excellent for applications that require high-quality finishes.
• 1.2738: Best for larger molds or those needed to last longer.

Final Thoughts

Selecting the correct plastic mold steel is essential for the success of any molding endeavor. Understanding the hardness differences among 1.2311, P20, and 1.2738 can help guide you to make the best decision based on your specific requirements.

Frequently Asked Questions

1. What are the uses of 1.2311 mold steel?
   • Ideal for medium-sized molds due to its balanced features.
2. Is P20 suitable for high-polish applications?
   • Absolutely, P20 is highly regarded for its polishability.
3. How does 1.2738 compare to P20 in hardness?
   • 1.2738 is generally harder than P20, making it better for larger molds.
4. Can 1.2311 be used for large molds?
   • Although possible, 1.2738 or P20 would be better suited due to their hardness characteristics.
5. Do these steels require post-treatment?
   • No, all these steel types are pre-hardened and can be utilized without further heat treatment.

The die steels 1.2311 and 1.2738 hold significant positions in the production of molds, including those for plastic injection and die casting.

1.2738 steel is particularly beneficial for molds encountering substantial impact loads or necessitating high wear resistance. On the other hand, 1.2311 is suitable for general mold applications, allowing for the creation of larger, intricate plastic molds and strong mechanical parts, making it fit for crafting high-speed cutting tools. Conversely, 1.2311 is more suited for smaller plastic molds and typical mechanical parts.

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