1. The fake 35CrMo seamless tube is easy to be scratched, because the equipment of the manufacturer of the fake seamless steel pipe is simple, easy to produce burrs and scratch the steel surface. Deep scratch reduces the strength of steel.
2. The fake 35CrMo seamless tube has no metallic luster and is light red or pig iron like.
3. The transverse reinforcement of the fake 35CrMo seamless tube is thin and low, which often leads to insufficient filling. The reason is that in order to achieve a large negative tolerance, the reduction of the first few passes of the finished product is too large, the iron mold is too small, and the hole mold is not enough.
4. The cross section of the fake 35CrMo seamless tube is oval. The reason is that in order to save materials, the reduction of the front two passes of the finished roller is too large. The strength of the 35CrMo seamless tube is greatly reduced, and it does not meet the standard of the seamless steel pipe's overall dimension.
5. The high-quality 35CrMo seamless tube has uniform composition, high tonnage of cold shear, smooth and neat end face of cutting head, while the fake 35CrMo seamless tube often has the phenomenon of meat falling on the end face of cutting head due to poor material, that is, uneven, and no metallic luster.
6. There are many impurities in the material of the fake 35CrMo seamless tube, the density of the steel is too small, and the size is seriously out of tolerance, so it can be weighed and checked without the vernier caliper.