API 5CT oil casing hardness test

For API 5CT oil casing, hardness is a very important indicator. Only oil casing with qualified hardness can ensure the effect of use. On the contrary, if the hardness is unqualified, problems may easily occur during use and cause accidents. causing danger. If you want to know the hardness of API 5CT oil casing, you can actually test the oil casing through experiments.

Hardness Test

The hardness test is to use a hardness tester to slowly press a hard indenter into the surface of the API 5CT petroleum casing sample under specified conditions, and then determine the material hardness by testing the indentation depth or size.

Hardness test is a relatively simple, fast and easy-to-implement method for testing the mechanical properties of materials. The hardness test is non-destructive. There is an approximate conversion relationship between the material hardness value and the tensile strength value. The material hardness value can be converted into the tensile strength value, which has very important practical significance.

Since tensile testing is inconvenient and it is more convenient to convert hardness into strength, more and more people only test the hardness of materials and less often test their strength. Especially due to the continuous advancement and innovation of hardness tester manufacturing technology, it is now possible to directly test the hardness of some materials that could not be directly tested in the past, such as the hardness of API 5CT petroleum casing. Therefore, there is a trend that hardness testing gradually replaces tensile testing.

The actual wall thickness of API 5CT oil casing is often clearly specified, and the deviation range is basically around 5%. API 5CT oil casing requires that the appearance must be coated with anti-corrosion paint. The manufacturer must pass API certification and issue an API 5CT certificate. Production and oil fields can only purchase products from manufacturers with API 5CT certification.