Stainless steel angle bar as a common steel, with a wide range of markets. Due to more varieties of specifications, the manufacturer’s quality standards vary, to some extent, there are good and bad situation, resulting in a lot of users in the choice of stainless steel angle bar material problems. This article simply summarizes the purchase of stainless steel angle bar material quality assessment methods and common points of attention, for reference.
stainless steel angle bar commonly used in metal components, connectors and the basic framework of the structures. Has a good weldability and mechanical stress intensity, and have good plastic deformation properties. Procurement How to judge the quality of stainless steel angle bar?
First, the stainless steel angle bar through the naked eye to determine the appearance of qualitative
Stainless steel angle bar for the appearance of the quality of industry standards and has a clear requirement, covering the stratification, scarring, cracks, and many other specific provisions, and secondly, the standard also focuses on geometric deviation made a series of provisions, Curvature, edge width, edge thickness, vertex angle, theoretical quality
Through the naked eye carefully observed, supplemented by a number of routine testing tools, and control the implementation of standards, the user is easy to judge from the hands of the hands of the stainless steel angle bar whether the product is a standard qualified products, qualified manufacturers at the factory has a more stringent quality Process. Products can stand the test. At least in the appearance and size will not have too much deviation, the appearance of observation is a more effective primary test method.
For example, a 2B surface 201 and 304 of the stainless steel angle bar material, through observation can be found in the 201 color slightly dull, while the 304 surface of the material is shiny, we can use the palm pressure on the surface of the material, we can find deep fingerprints Of the 201, compared to lighter handprint is 304 material. However, such methods need to sum up experience, suitable for many years of veteran practitioners. Simple material judgments can to some extent prevent the supplier shoddy, reduce losses.
Second, through the detection reagent to determine stainless steel angle bar
Conditions of the purchaser can be through special chemical reagents on the stainless steel angle bar component analysis, which is the most scientific detection methods. stainless steel angle bar from the chemical composition point of view tend to the general structure of rolled steel series, testing indicators are C, MN, P, S four test standards. According to the characteristics of different grades, the chemical content also has some differences, for example: C <0.22%, Mn: 0.30-0.65%, P <0.060%, S <0.060%. For these chemical composition we can control the GB223, JISG1211-1215, BS1837 and other methods to detect, so as to ensure the quality of stainless steel angle bar.
The actual operation of the process, the purchaser may not have the opportunity to purchase the stainless steel angle bar to conduct a comprehensive chemical analysis and testing. More common practice is through the purchase of conventional stainless steel testing reagents, fast and intuitive stainless steel angle bar for chemical reaction testing. For example, a reagent drops to the surface of stainless steel angle bar, 201 change dark brown, 304 red, you can initially determine the material properties. Of course, the specific chemical reaction depends on reagent instructions, can not be generalized.
Third, judging by the price of stainless steel angle bar
As stainless steel angle bar procurement staff, must be fully familiar with and understand the varieties classification and purchase price of the stainless steel angle bar. Pay close attention to the steel market, when the supplier offer price significantly lower than the market average price stainless steel angle bar, that in itself is not reasonable, there is a doubt. Or poor quality, the material does not conform to the standard, or informal manufacturers of low grade products. If the price of the same steel grade is large, it must carefully consider whether or not the quality problem.
To summarize, we want to purchase to qualified stainless steel angle bar, first of all, from the product appearance against industry standard judge whether the products meet quality requirements, the second conditional strict chemical parameters testing can be used to determine the standard material, no conditions of conventional chemical reagent can be used in the field of material simple judgment. In this way, can the maximum guarantee we can procurement to the best quality stainless steel angle bar.
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