Executive Standard: SA299 Gr. B steel plates comply with the ASME standard, specifically ASTM A299/A299M.

SA299 is a carbon-manganese-silicon steel plate designed for pressure vessels—often referred to as "gas drum steel" under US standards.

ntroduction to SA299 Gr.A Steel Plate:
SA299 Gr.A is a steel plate grade designated for boilers and pressure vessels under American standards.

A285 Gr.C and SA285 Gr.C steel plates represent the same grade, though they are governed by different standards.

SA283 Gr.B is a low-to-medium strength carbon structural steel plate conforming to the American Society of Mechanical Engineers (ASME) standard.