The 201 stainless steel strip has a large reduction in the first few passes, a small iron shape, and an unsatisfactory hole shape.
The method for judging the quality of 201 grade precision cold-rolled stainless steel strip is as follows:
The composition of high-quality stainless steel strips is uniform, the tonnage of the cold shearing machine is high, and the end surface of the cutting head is smooth and tidy. However, due to the poor material of the fake stainless steel strip, the end surface of the cutting head often has the phenomenon of falling meat, that is, unevenness and no metallic luster.
And the cross section of the fake 201 stainless steel strip is oval, the reason is that in order to save materials, the reduction amount of the first two passes of the finished roll is too large, the strength of this kind of rebar is greatly reduced, and it does not conform to the external dimensions of the rebar. standard.
In addition, the material of the fake and inferior 201 stainless steel belt contains a lot of impurities, the density of the steel is too small, and the size is out of tolerance, so it can be weighed and checked without a vernier caliper.