How To Carry Out The Tensile Test Of 304 Stainless Steel Pipe And Test Its Standard Hardness?

1. The tensile test is to tube 304 stainless steel into a sample, pull the sample to fracture on the tensile testing machine, and then measure one or more mechanical properties, usually only the tensile strength, yield strength, elongation after fracture and reduction of area. Tensile test is the most basic mechanical property test method for metal materials. Almost all metal materials have specified tensile test as long as they have requirements for mechanical properties. Especially for those materials whose shape is not convenient for hardness test, tensile test has become the only means to test mechanical properties.

2. Hardness test is to slowly press a hard indenter into the surface of the sample with a durometer according to the specified conditions, and then test the indentation depth or size, so as to determine the hardness of the material. Hardness test is the simplest, fastest and easiest method to implement in the mechanical property test of materials. Hardness test is non-destructive, and there is an approximate conversion relationship between material hardness value and tensile strength value. The hardness value of materials can be converted into tensile strength value, which is of great practical significance.

Because the tensile test is not easy to test, and it is convenient to convert the hardness to strength, people are more and more only testing the hardness of materials and less testing their strength. In particular, due to the continuous progress and innovation of the hardness tester manufacturing technology, some materials that could not directly test the hardness, such as 304 stainless steel pipe, 304 stainless steel tube plate and 304 stainless steel tube belt, are now possible to directly test the hardness. Therefore, there is a trend that hardness test gradually replaces tensile test.