JST Industry

Provides machining services for a wide range of materials

CNC Machining Material Introduction

CNC machining, or computer numerical control machining, is an automated machining technology that realizes high precision and high efficiency by controlling the trajectory of the machine tool through a computer program. In modern manufacturing, CNC machining has become an indispensable means of manufacturing because of its ability to meet the needs of mass production of complex parts. However, the quality and efficiency of CNC machining depends largely on the material selected.
Material selection is critical to CNC machining and is directly related to the functionality, durability, cost-effectiveness, and ultimately the competitiveness of the product in the marketplace. Correct material selection ensures a smooth machining process, reduces production defects and scrap rates, and also enhances product performance and service life. For example, aluminum alloys are commonly used in aerospace and automotive manufacturing due to their light weight and good mechanical properties, while stainless steel is widely used in chemicals and medical devices due to its excellent corrosion resistance.

In addition, the physicochemical properties of the material, such as hardness, temperature resistance, wear resistance and heat treatment characteristics, are also factors to consider when CNC machining. Different material properties determine their specific requirements for cutting speed, tool selection and cooling methods during machining. Therefore, an in-depth understanding of the properties of various materials is important for optimizing CNC machining processes and improving product quality.
At JST Industry, we offer comprehensive CNC machining services and have extensive experience in material machining. We encourage our customers to communicate with our engineers at the design stage in order to provide them with expert material selection advice and machining solutions to ensure that their products are manufactured both economically and efficiently. Through careful material selection and precise CNC machining, we help our customers' products stand out in the marketplace.

CNC Machining Material Compare

In the machining industry, different materials exhibit different machining characteristics and applications during CNC machining due to their unique physical and chemical properties. The following is a detailed comparison of the differences and variations in CNC machining of aluminum, stainless steel, brass, alloys and plastics:


Lightweight: Aluminum alloys have a low density, which makes them popular in applications where weight reduction is required, such as aerospace and automotive manufacturing.

High Thermal Conductivity: Aluminum alloys have excellent thermal conductivity, making them ideal for parts that need to dissipate heat quickly, such as radiators or heat exchangers.

Machinability: Aluminum alloys are easy to cut and form, but CNC machining generates a lot of heat and requires careful cooling to prevent distortion.

Stainless Steel

Corrosion Resistance: Stainless steel is highly resistant to corrosion and oxidation, making it suitable for use in chemical, medical and food processing applications with high sanitary standards.

Strength: Stainless steel has a high degree of strength and hardness, making it excellent in environments subject to heavy loads or high stress.

Machining Difficulty: Stainless steel is relatively difficult to machine, requiring the use of more abrasion-resistant cutting tools, and cooling and lubrication are more important during the machining process.


Mechanical Properties: Brass has good mechanical properties, including high strength and excellent cold working properties.

Aesthetics: Brass has a distinctive golden appearance and is often used for decorative parts or applications requiring good electrical conductivity.

Machining Characteristics: Brass has slower cutting speeds than aluminum alloys during CNC machining, but still maintains good machinability.

Alloys (Alloy)

Application-specific Advantages: Depending on their composition and proportions, different alloys exhibit different properties, such as high strength, toughness, or resistance to high temperatures.

Versatility: Alloys are available in a wide variety of materials and can be customized to meet the needs of specific applications.

Machining Requirements: CNC machining of alloys may require special tooling and machining parameters to accommodate their hardness and heat treatment properties.


Versatility: Plastics range from general-purpose to engineering plastics, each with unique properties and applications.

Cost Effective: Plastics are generally low cost and easy to mass produce for cost-sensitive applications.

Ease of Machining: CNC machining of plastics is relatively simple and does not require the same high cutting forces as metals, but care needs to be taken to prevent thermal distortion during machining.
Service Feedback​​​​​​​
  • Emily Thompson - Material Selection & Cost Effectiveness
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    “I am extremely satisfied with the CNC machining services provided by JST Industry. Their team of experts has been of great help in material selection, enabling us to find materials that meet the performance requirements as well as being cost effective. In particular, they provided a thorough analysis of the choice between aluminum alloy and stainless steel, which helped us keep our product lightweight and corrosion-resistant while effectively controlling costs. Throughout the process, I was impressed by the professionalism and attention to customer needs demonstrated by JST Industry.”
  • Ali Al-Fahad - Design Optimization and Machining Accuracy
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    “In the early stages of design, we were concerned that CNC machining might not be able to meet our stringent requirements for product accuracy. However, JST Industry completely allayed our concerns through their precision machining technology and careful design optimization suggestions. Their machining tolerances were so precisely controlled that the size and quality of the final product far exceeded our expectations. In addition, their design suggestions for reducing machining costs were very practical, which played a key role in optimizing our product design and reducing overall costs.”
  • Ivan Petrov - Surface Finishing & Quality Control
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    “JST Industry has done an excellent job with the surface finish after CNC machining. Our products require fine surface quality and they not only offer a wide range of surface finish options, but also ensure high standards and consistency in every process. Every step of the process, from deburring to final surface coating, is subjected to stringent quality control, resulting in the delivery of parts with smooth, burr-free surfaces that fully meet our quality standards.”
  • Mr. Han - Customer Service & Logistics
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    “The overall experience with JST Industry has been great. Their customer service team is very professional and able to respond quickly to our needs and questions. The logistics arrangements were also very well organized and our products arrived safely and on time for both domestic and international shipments. In addition, they provide very careful product packaging that takes into account the fragility and weight of the products to ensure safety during transportation. Overall, JST Industry has not only excelled technically, but we are also very satisfied with their customer care and quality of service.”


  • Q I am designing a new product that requires CNC machining to create a prototype and final product. How do I select the most suitable material for CNC machining for my project?

    A At JST Industry, we understand that choosing the right CNC machining material is critical to product design. You should first consider the scenario in which your product will be used, including the required mechanical properties, temperature resistance, corrosion resistance, and cost-effectiveness. We offer a wide range of material options including, but not limited to, aluminum alloys, stainless steel, brass, various alloys, and many plastics. Our team of experts can assist you by selecting the most appropriate material for your specific needs and provide expert design optimization advice to ensure an efficient and cost-effective CNC machining process.
  • Q I would like to know how the selection of different materials in CNC machining process affects the final machining cost?

    A At JST Industry, we recognize that material selection has a significant impact on CNC machining costs. The type of material, difficulty of machining, and market availability all affect its price. For example, steel is widely used due to its lower cost, while titanium alloys and certain advanced alloys are more expensive due to their higher material cost and machining difficulty. In addition, the machinability of the material also affects the cost, e.g. aluminum alloys are usually less expensive due to their ease of machining. Our quoting system takes all of these factors into account to ensure you get the most accurate cost estimate.
  • Q What are some design practices that can help me reduce machining costs when designing CNC machined parts?

    JST Industry, with years of industry experience, offers the following design optimization suggestions to reduce CNC machining costs:
    Consider non-functional internal right angles in the design and change them to R angles to reduce clearance costs.
    Reduce the number of bone positions on the part to minimize machining time and complexity.
    Increase wall thickness where appropriate to minimize the risk of deformation of the part during machining.
    Use standard hole sizes and threads whenever possible to simplify the machining process.
    Work with our engineers to select economically sound material and finish options.
    Mark only the tolerances that are necessary and most important to the design to avoid unnecessary accuracy requirements.
  • Q I have stringent requirements for accuracy in my products, what tolerances can be achieved with CNC machining and how does this affect the quality of the final product?

    A At JST Industry, our CNC machining services are capable of meeting extremely high tolerances, often to ±0.01mm, thanks to our advanced machining equipment and strict quality control processes. This high-precision machining capability ensures consistency and reliability of parts, which is especially important for assemblies that require high-precision fit. Our quality assurance system includes multiple inspections and calibrations to ensure that each part conforms to the customer's design drawings and tolerances, thus guaranteeing the quality of the final product.
  • Q I am concerned that the surface of a CNC machined part may have burrs or be uneven. How can I ensure that the surface of the machined part is of the desired quality?

    JST Industry utilizes a range of advanced machining technologies and stringent post-processing procedures to ensure the surface quality of CNC machined parts. Our operators perform careful deburring after
    machining, including hand trimming and machine finishing, to ensure that all parts have a smooth, angular-free surface. In addition, we use precision measuring tools to check the dimensions of the parts several times to ensure that the dimensional accuracy meets the tolerance requirements. Depending on the needs of our customers, we also offer a variety of surface treatment services, such as anodizing, plating, powder coating and painting, to further enhance the appearance quality and corrosion resistance of the parts. Through these measures, we are ble to ensure that the surface quality of each part meets or exceeds our customers' expectations.
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Kunshan JST Industry Co., Ltd is a professional manufacturer of CNC machining parts, which were applied to the field of medical, aerospace & aviation, electronics, security & safety, industrial equipment and automotive.

Copyright © 2020 Kunshan JST Industry Co., Ltd


   86-18915758793

   86-512-55260690

   info@jstindustry.com


   Carrolgu

   86-18915758793