Comparasion with ASTM A515 and A516 grade 55 carbon steel plate

ASTM A515 and A516 grade 55 are both carbon steel plate standards used for manufacturing pressure vessels, but there are some differences in material properties and applications.

1. ASTM A515：
-A515 is generally used for medium high temperature and high pressure applications, with high tensile strength and yield strength.
-Usually designed for pressure vessels operating at moderate temperatures, such as boilers and storage tanks.
-A515 offers different levels (Grade 60, 65, 70), each with specific mechanical performance requirements.

2. ASTM A516 grade 55：
-A516 grade 55 is a low-carbon steel plate used for applications at low to moderate temperatures and pressures, suitable for general pressure vessels.
-This material is typically used in the range of -20 °C to 100 °C and has good toughness and weldability.
-A516 Grade 55 is a low-alloy steel with slightly inferior mechanical properties compared to A515, but it is more suitable for low-temperature applications.

When selecting suitable materials, it is necessary to determine based on working conditions, temperature requirements, and required mechanical properties. For high temperature and high pressure environments, A515 may be more suitable; For low-temperature or general pressure vessel applications, A516 grade 55 may be a more suitable choice.