The mechanical properties test methods are mainly divided into two categories: tensile test and hardness test. The tensile test is to make a sample of carbon steel tube, break the sample on a tensile testing machine, and then measure one or several mechanical properties, usually tensile strength, límite elástico, elongation after fracture and area shrinkage.
Tensile test is the basic mechanical property test method of metal materials. Tensile tests are required for almost all metal pipes as long as mechanical properties are required. Especially for hardness testing of materials that are not easy to form, tensile testing is the only means of testing mechanical properties.
The hardness test is to slowly press a hard indenter into the surface of the carbon seamless steel tube under specified conditions, and then use the depth or size of the test indentation to determine the hardness of the material. La prueba de dureza es un simple, fast and easy-to-implement method in material mechanical property test. La prueba de dureza no es destructiva., y existe una relación de conversión aproximada entre el valor de dureza del material y el valor de resistencia a la tracción. Es decir, the hardness value of the steel pipe can be converted into the tensile strength value, que tiene una gran importancia práctica.
Because the tensile test is not easy to test, and it is also easy to convert hardness into strength. como material de construcción, more and more people are only testing the hardness of materials and rarely their strength. It is now possible to directly test the hardness of some materials that could not be directly tested before, como tubos de acero sin costura, stainless steel tubes, placas de acero inoxidable y tiras de acero inoxidable, thanks to the continuous advancement and innovation of hardness tester manufacturing technology.
Por lo tanto, the hardness test has a tendency to gradually replace the tensile test. Most stainless steel welded tube standards specify tensile and hardness tests. For materials that are inconvenient for hardness testing, such as stainless steel seamless tubes, only tensile testing is required. In the Chinese and Japanese standards, three hardness test methods of Brinell, Rockwell and Vickers are generally prescribed to determine the hardness value of stainless steel seamless tubes. Hardness test. For the hardness test of stainless steel, el probador de dureza Rockwell es el instrumento preferido. Su equipo es simple y fácil de operar., y el valor de dureza se puede leer directamente sin personal de prueba profesional. La eficiencia de la prueba es alta y es muy adecuada para uso en fábrica..