How to choose plastic mold steel

Choosing plastic mold steel is a very important process in mold manufacturing, because the classification of plastic mold are generally on the length of plastic mold by 5 grades, grade1 is over a million times; grade 2 is 500,000-100 million; grade3 is from 300,000 to 500,000; grade4 is from 100,000 to 300,000, grade 5 is 10 million below

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for Grade1 and 2, mold stell require hardness after heat-treatment reaching around HRC50 , because plastic which is easy to wear, could violate the tolerance, so we should select steel heat afetr treatment showing better performance, but also at high hardness of the state has good cutting performance, normally, it can be introduced to choose imported raw materials in the Pearl River Delta.

Usually chosen in Sweden , S136, U.S. 420, H13, Europe, ,,083, or Japan SKD61, DC53 (the original mold for the metal material, the use of special circumstances.) grade 1 steel. In addition, raw plastic materials and the added filler have a great impact on the mold steel choice, especially glass fiber could have a very strong worn impact on the mold cavity surface.

Some plastic materials have acid corrosion, and some added modified enhancer or other agent, such as glass fiber lead to mold damage, so plastic material selection should be considered. There is strong general election corrosive plastic S136, ,420 grade1 steel, then weak corrosive plastic should elect S136, ,420, there SKD61, NAK80, PAK90, 718M. Strong acid plastic material: PVC, POM, PBT plastic material weak acid has: PC, PP, PMMA, PA,

Product appearance of the requirements of the selection of plastic mold material there is also a great impact, transparent pieces and surface requirements of parabolic mirror products, may choose to use the material S136, ,718 S, NAK80, PAK90, 420, high transparency of the mold should choose S136 and 420.

More than meeting the product requirements are from the run, but, are you involved in the demand for the cost of molds? you should also consider price, Take the S136 to compare with , a difference of 55-60 yuan per kilogram, if you choose incorrectly, you may lose much money

Pre-hardened mold steel , there is grade: S136H, H, 718H, 083H, hardness HB270 &#;- 340, 45 die by P20, 718,738,618,,, particularly low for the requirements molds, may have used S50C, 45 # steel, that is, directly in the mold cavity up to do.

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# 4 Tips for Selecting the Right 718H Steel.

When it comes to selecting materials for advanced applications, the choice of steel is crucial. Among various grades, 718H steel stands out as a popular choice for industries such as aerospace, oil and gas, and power generation. Its unique composition and properties make it ideal for high-stress environments. This article aims to provide you with four essential tips for selecting the right 718H steel, focusing on its functional components, advantages, and practical applications.

## 1. Understanding the Composition of 718H Steel.

The first step in selecting 718H steel is to understand its chemical composition. This grade is a nickel-based superalloy composed of approximately 50% nickel, 18% chromium, and small amounts of titanium, molybdenum, and aluminum. This precise combination enhances its corrosion resistance and heat strength, making it ideal for applications that require prolonged exposure to high temperatures. The alloy is also characterized by its excellent fatigue and thermal stability, ensuring longevity and reliability in various conditions.

## 2. Assessing Mechanical Properties.

Next, pay close attention to the mechanical properties of 718H steel. It boasts exceptional tensile strength, yielding capabilities, and ductility, which are critical for high-performance applications. The yield strength can exceed 1,100 MPa (approx. 160,000 PSI), making it capable of withstanding high loads without deformation. Its ductility allows for easy machining and forming, which is advantageous in complex component manufacturing. Always evaluate these properties in relation to the specific requirements of your application to ensure optimal performance.

## 3. Considering Production Flexibility.

One of the standout advantages of 718H steel is its production flexibility. This material is highly workable, allowing for various fabrication techniques, including forging, casting, and additive manufacturing. Its adaptability makes it suitable for a wide range of applications&#;from turbine blades in jet engines to downhole components in drilling operations. Furthermore, its ability to maintain mechanical properties even after machining facilitates rapid prototyping and design iterations, contributing to overall efficiency in production processes.

## 4. Analyzing Application-Specific Requirements.

Finally, it&#;s crucial to consider the specific requirements of your application when selecting 718H steel. Different environments may demand varying levels of corrosion resistance or thermal stability. For instance, in aerospace applications, materials must endure extreme temperatures while retaining strength. Conversely, in the oil and gas sector, enhanced corrosion resistance is critical due to the aggressive nature of environments. Carefully analyzing the operational conditions and matching them with the unique properties of 718H steel will lead to better-informed decisions and optimal performance outcomes.

## Conclusion and Future Outlook.

In summary, selecting the right 718H steel involves understanding its composition, assessing mechanical properties, considering production flexibility, and analyzing application-specific requirements. As industries continue to face demands for higher efficiency, accuracy, and adaptability, 718H steel remains a top contender for various applications. By applying the tips outlined in this article, you can make an informed choice that aligns with your project's goals.

As we look to the future, the development of advanced materials like 718H steel will likely continue to evolve, enabling innovations across various fields. Stay informed about advancements in material science to ensure that your selections remain relevant and effective in meeting emerging challenges.

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