ASTM A516 is a low-to-medium carbon steel that boasts high strength relative to weight, high ductility and high machinability. It is available in four grades of varying strength: 55, 60, 65 and 70.

Compared to other grades, A516 is a highly machinable PRESSURE VESSEL STEEL PLATE steel grade, making it ideal to produce welded vessels where materials are manipulated to form the curved shape of a storage tank or boiler.

To increase strength while keeping carbon levels low, other elements are added to harden and strengthen, such as manganese, phosphorus, sulfur and silicon. Each grade has varying levels of each element, which are detailed in the chart below.

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