The following is a square tube characteristics: 1 square tube performance index analysis - strength at great speed on the load acting on the parts known as impact load, ability to resist damage in metal impact loading is called toughness. 2. Square tube performance index analysis - discussed the impact strength and toughness in front of, plastic, metal hardness are under static load mechanical function pointer. In fact, many machine parts are working in reincarnation load, iron square tube price report, in this context parts will produce fatigue. 3. Square tube performance index analysis - Brinell hardness (HB), Rockwell hardness (HRA, HRB, HRC) and Vickers hardness (HV) exhausted other methods commonly used method. Hardness is a measure of the hardness of the metal material pointer. The present production method for measuring the hardness of the most commonly used method is the indentation hardness, which is a certain geometry of the indenter under a certain load is pressed into the surface of a metallic material to be tested, to determine the hardness value according to the degree of being pushed. With economic development, the emergence of the society more and more counterfeit products, in order to prevent the purchase of the pipe, do not let themselves be deceived, then we need to know a little about how to determine the authenticity of the pipe: "We can to be judged by observing the pipe surface smoothness and flatness, if the surface is relatively flat square tube, square tube iron Hefei prices reflect this side of the tube it is good, on the contrary, if the surface is not so smooth, and the size and thickness not standardized, you can reflect this square tube is inferior product. "galvanized iron square tube prices _ exhibition of Commerce Bo (certified) _ Hefei iron square tube prices provided by the Hefei exhibition Bo Trading Company. Hefei Show Bo Trading Company (www.hfzhanbo.com) (www.hfzhanbo.com) is Hefei, steel leaders, over the years, the company implement the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customers needs. In the exhibition of Commerce Bo leadership with the staff warmly welcome all inquiries negotiations to create the exhibition of Commerce Bo better future.