|
ASTM B221 is a standard specification for aluminum and aluminum alloy extruded bars, rods, and profiles, and the following is a detailed interpretation of the ASTM B221 standard: 1. Overview of the standard Standard number: ASTM B221 Scope of application: This standard applies to bars, rods, wires, profiles and tubes made of aluminum and aluminum alloys by extrusion process. It specifies the requirements for the chemical composition, mechanical properties, dimensions, appearance quality, test methods, etc. of these products. Second, the main requirements The ASTM B221 standard details the range of chemical compositions of aluminum and aluminum alloy extrusion products in different alloy series. These chemistries have a significant impact on the mechanical properties, corrosion resistance and processability of materials. Manufacturers need to ensure that the chemical composition of the product meets the requirements of the standard. Mechanical properties Mechanical property index: including tensile strength, yield strength, hardness, elongation, etc. These performance indicators are specified according to the alloy type, extrusion process and heat treatment state of the material. Test method: The standard stipulates the corresponding test method to evaluate the mechanical properties of the product, such as tensile test, hardness test, etc. Dimensions & Tolerances Size requirements: The standard specifies the size specifications of the product, including diameter, length, wall thickness, etc., to ensure the interchangeability and consistency of the product. Tolerance range: According to the different uses and accuracy requirements of the product, the corresponding tolerance range is given in the standard. Appearance quality Appearance requirements: The surface of the product should be smooth and clean, no cracks, no bubbles, no peeling and other defects. The color should be uniform and consistent, with no obvious color difference. Test items: including surface finish, color, uniformity and other aspects of the test. Test items and importance In addition to the above aspects, the ASTM B221 standard also specifies other test items, such as corrosion resistance, fire performance, etc. The implementation of these testing programs is essential to ensure the quality and performance of the product. Corrosion resistance: test the corrosion resistance of the product in different environments and evaluate its durability in practical applications. 3. Application fields, Aluminum and aluminum alloys, extruded bars, rods, and profiles under the ASTM B221 standard are used in a wide range of applications, such as: electron machinery, etc. IV. Conclusions The ASTM B221 standard provides comprehensive guidance for the production, processing, and application of aluminum and aluminum alloy extruded products as an important specification for aluminum and aluminum alloy extruded products. By following this standard, we can ensure that the quality and performance of products meet industry requirements and promote the healthy development of aluminum and aluminum alloy extrusion industry. At the same time, this standard also provides an important basis for product inspection and quality certification in international trade.Huanickel?related?products?strictly?implement?this?standard.?For?more?information?about?the?standard?and?the?corresponding?product?information,[email protected] |