Identification of channel steel
1. Low quality stainless steel channel steel products have a lot of impurities, due to the low density of the steel, generally poor, if there is no vernier calipers, you can carry out a weight test.
2. Poor quality stainless steel channel steel, its production process is simple, there are burrs and other scratches on the surface, deep scratches will also make the strength of the channel steel.
3. Sub-type stainless steel channel steel has no metallic luster. The rolling temperature of the low quality material does not meet the requirements, and it can not be rolled according to the specified austenite zone. Of course, the performance of the channel steel can not meet the requirements.
4. Selection of high-quality stainless steel channel steel, uniform composition, large tonnage of cold shear, cutting head end face smooth, pseudo-steel channel material is poor, cutting head end face is generally not flat, gray.
5. The section of subtype stainless steel channel steel is ovoid. Some manufacturers in order to save raw materials, in the finished drum front end to do a lot of cutting, this will not only make the strength of the steel greatly reduced, but also will not meet the size requirements.
6. Due to poor production equipment, uneven material, high content of impurities, the surface is prone to scarring and other reasons.
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