What is the chemical composition of ASTM grade A285 C

ASTM grade A285 C is a carbon steel plate used for pressure vessel applications. Its chemical composition is defined by ASTM A285/A285M, which specifies the requirements for low and intermediate tensile strength carbon steel plates.

The chemical composition of ASTM grade A285 C includes carbon (C), manganese (Mn), phosphorus (P), sulfur (S), and silicon (Si). The maximum allowable content for each element is as follows:

- Carbon (C): 0.28%
- Manganese (Mn): 0.90%
- Phosphorus (P): 0.025%
- Sulfur (S): 0.025%
- Silicon (Si): 0.15-0.40%

In addition to these elements, other trace elements may also be present in small amounts. The material is normalized or stress relieved, which means that it has been heat-treated to remove internal stresses and improve its mechanical properties.

Overall, ASTM grade A285 C is a moderately high-strength carbon steel with good weldability and low-to-moderate tensile strength. It is commonly used in the production of pressure vessels, such as boilers and storage tanks, where high temperatures and pressures are encountered.