Knowledge

SA516Gr70 is a type of steel for low and medium temperature pressure vessels in the American standard, and its execution standard is ASME SA516/SA516M. There are also SA516Gr65, SA516Gr60, and SA516Gr55 in the standard. Due to its excellent steel plate performance, it is widely used in the industry.

SA516Gr70 is named according to its grade number. If named according to the tensile strength grade, it corresponds to SA516Gr485. Similarly, SA516Gr65 corresponds to SA516Gr450, SA516Gr60 corresponds to SA516Gr415, and SA516Gr55 corresponds to SA516Gr380.

SA516Gr70 is a relatively common type of pressure vessel steel plate in the American standard, and its status in the industry is comparable to that of the Chinese standard Q345R in the domestic pressure vessel industry. Moreover, the composition and performance of SA516Gr70 and Q345R are relatively close to some extent and can be approximately regarded as Q345R.

 

The requirements for SA516Gr70 are relatively strict compared to Q345R. Firstly, the Mn content in the chemical composition of SA516Gr70 is more strictly required than that of Q345R. In terms of heat treatment, SA516Gr70 has strict and clear requirements. When the thickness of SA516Gr70 is ≤ 40mm, it can be non-normalized; when the thickness of SA516Gr70 is > 40mm, it must be normalized; when the thickness of SA516Gr70 is ≤ 40mm and there is a requirement for low-temperature impact test, it must be normalized unless the customer has special requirements. However, there are no clear requirements for the heat treatment method of Q345R in the standard.

The above is our understanding and knowledge of SA516Gr70. We hope it can be helpful to you.

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