What is the maximum carbon content in A285 grade C steel

A285 grade C steel is a carbon steel plate used for pressure vessel applications. The maximum allowable carbon content in A285 grade C steel depends on the thickness of the plate and its intended use.

For A285 grade C steel plates up to 1 inch thick, the maximum carbon content is 0.28%. This is specified by the ASTM A285 standard, which sets the chemical composition requirements for this grade of steel. However, if the plate is intended for fusion-welded pressure vessels, the maximum carbon content is reduced to 0.23%.

For A285 grade C steel plates over 1 inch thick, the maximum carbon content is 0.31%. This applies to all A285 grade C plates, regardless of their intended use.

It is important to note that the carbon content is just one of many factors that determine the mechanical properties of A285 grade C steel. Other factors, such as alloying elements, processing methods, and heat treatment, can also have a significant impact on the strength, toughness, and ductility of the material. Therefore, it is important to carefully consider all of these factors when selecting a steel grade for a particular application.