①For galvanized seamless steel pipes made of tensile specimens, the tensile testing machine of the specimens will be pulled to the fracture, and then measured, usually only the mechanical properties of tensile strength or more, yield strength, elongation and cross-section are measured Shrinkage. Tensile test is a test method for metal materials. Almost all metal materials provide the basic mechanical properties for tensile test as long as the required mechanical properties are required. Especially those that are not easy to form material hardness test, tensile test, as the only means of testing mechanical properties.
②The hardness test is a rigid indenter durometer that is slowly pressed into the surface of the sample, and then the depth or size of the indentation is tested to determine the hardness of the material. Hardness test is the simplest, fastest and easiest way to test the mechanical properties of materials. The non-destructive hardness test has similar values in terms of the relationship between hardness and tensile strength values. The hardness value of the material can be converted into tensile strength, which has great practical significance.
Because the tensile test is not easy to test, and the conversion of the hardness strength is very convenient, especially due to the continuous progress and innovation of the hardness of the manufacturing technology, the hardness of some materials cannot be directly tested, such as galvanized seamless steel pipes, stainless steel plates and stainless steel strips. Wait, now you can test the hardness directly. Therefore, there is a tendency to gradually replace the tensile test.