Quality identification of stainless steel products
2024-12-21
In daily life and many industrial fields, stainless steel products have a wide range of applications. However, the quality of stainless steel products on the market is uneven, and how to accurately identify the pros and cons of its quality has become an important skill that consumers and relevant practitioners need to master. The following will describe in detail several practical methods to identify the quality of stainless steel products.
1. Check appearance
Appearance is the first step in identifying the quality of stainless steel products, and it is also a more intuitive link.
The surface of high-quality stainless steel products usually presents a uniform color, a high finish, no obvious scratches, pits or bumps and other defects. For example, the surface of high-quality stainless steel tableware should be smooth as a mirror, uniform reflection, and no rough texture or processing marks can be seen under the light. If there is an uneven color on the surface, such as dark or yellow spots in some places, it is likely to mean improper treatment in the production process, or there is a problem with the material itself.
Moreover, there are many clues to be found by looking at the edges and corners of the product. The edge of good stainless steel products will be finely polished, the touch is round, and there will be no feeling of cutting hands; Poor quality products may have rough edges, burrs, and even cracking, which not only affects the appearance of beauty, but also may bring safety risks during use.
2. Material detection
The material of stainless steel is the key factor to determine its quality, different types of stainless steel have different composition and performance characteristics, common such as 304 stainless steel and 316 stainless steel.
Identification view
Regular stainless steel products generally mark the material model on their surface or packaging, which is the most simple and direct basis for judgment. For example, the product is marked with the word "SUS304", which indicates that it is made of 304 stainless steel. However, it should be noted that some bad merchants may carry out false labeling, so the logo can only be used as a preliminary reference, and further verification needs to be combined with other methods.
Magnetic test
Although it is not possible to judge the authenticity of stainless steel solely by magnetism, it can be used as an auxiliary means. Generally speaking, austenitic stainless steel (such as 304, 316) is a non-magnetic or weakly magnetic material, which may have a certain magnetism after cold working; Ferritic stainless steel and martensitic stainless steel have strong magnetic properties. Therefore, if a product claiming to be 304 stainless steel is very magnetic, it needs to doubt the authenticity of its material, but there may be exceptions like some special process processing or products with magnetic adsorption functional parts, to make a comprehensive judgment.
Chemical reagent testing
There are special chemical reagents for the detection of stainless steel, such as stainless steel detection fluid. When used, the detection liquid drop is placed on the surface of the stainless steel product, and the material type of stainless steel can be roughly determined by observing the color change compared to the reagent instructions. For example, when using a certain detection liquid to detect 304 stainless steel, if the color change meets the corresponding standard color range, then the product is more likely to be 304 stainless steel. However, the accuracy of this method is not 100%, and the operation should be carried out in strict accordance with the requirements of the manual to avoid misjudgment.
