When purchasing angle steel, you still need to determine its specific quality first. In fact, generally you only need to see the actual object, and then judge the quality of the material. So how to determine its quality?
1. Not prone to creases
The stainless steel material itself is relatively hard and not prone to creases, so you should pay special attention to whether there are creases on its surface. If it is a low-quality product, the folding marks will run through the longitudinal direction and are very obvious. Generally, this kind of problem occurs during rolling, and there may be cracking and other problems in the angle steel later.
2. The surface must be flawless
It is impossible for high-quality stainless steel to have surface defects, and even if they do exist, they are only in relatively small parts. There may be a lot of pitting on the inferior angle steel because the wear of the grooves is relatively serious, which affects the material processing and causes unevenness on the surface. This type of steel is of poor quality and will be affected later in life.
3. Comparison of hardness
The angle steel itself has a certain hardness and is unlikely to be seriously scratched. Some manufacturers have rudimentary equipment, and the steel may be prone to burrs, etc., and it is very easy to scratch the steel. If the scratch reaches a certain depth, it will definitely affect the strength of the material, and there is no guarantee that the angle steel will meet national standards.

As a simple cross-section steel material, stainless steel angle steel is a carbon structural steel for construction. It is widely used in metal components and factory building frames. It not only has good weldability and mechanical strength, but also has superior plastic deformation performance. There are many ways to judge the quality of stainless steel angle steel:
Appearance differentiation method: Industry standards for appearance quality requirements have clear regulations, especially in terms of delamination, scarring, cracks, etc. There are also certain regulations on geometric shape deviations in the execution standards, such as There are strict regulations on curvature, edge width, edge thickness, angle, theoretical quality and other items. These can be well reflected in appearance and are also a very effective basis for distinguishing the quality of stainless steel angle steel.
2. Chemical composition identification method: It is more scientific to identify by chemical composition, because the chemical composition of stainless steel angle steel belongs to the general structural rolled steel series, and the main indicators are the four inspection standards of C, MN, P, and S. At the same time, there are certain differences in chemical content according to the characteristics of different brands, for example: C<0.22%, Mn: 0.30-0.65%, P<0.060%S<0.060%. We can detect these chemical components through GB223, JISG1211-1215, BS1837 and other methods to ensure the quality of stainless steel angle steel.
3. Price estimation method: Fully understand the market conditions of each steel type. If the price of the same steel type differs greatly, you should consider whether there is a quality problem.
4. Integrity of traders: When doing business in the market, companies with good integrity have perfect pre-sales and after-sales performance. It is best to choose several traders for comparison. This is also an effective way to prevent stainless steel angle steel quality problems.
5. Contract law: In stainless steel transactions, if the amount is large, a good contract should be signed, indicating the steel type, quantity, material, time, delivery date, liability for violations of laws and disciplines, etc. When material discrepancies occur, losses can be recovered through negotiation or legal means.
It is not difficult to see that it is obviously more direct and convenient to distinguish the quality of stainless steel angle steel from its appearance, but to obtain more convincing results, it is necessary to use chemical methods to detect, plus price estimation, contract agreements and the integrity of traders. If you weigh it, you will surely be able to choose the stainless steel product you like.

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