It seems like you're referencing a steel specification. SA 387 Gr 22 refers to a type of steel plate specification under the American Society of Mechanical Engineers (ASME) standards. Here's a breakdown: - SA: ASME specification for steel plates - 387: Specific standard for pressure vessel plates - Gr 22: Grade 22, indicating the steel's composition and properties Grade 22 is a chromium-molybdenum alloy steel plate for pressure vessels and boilers, with a minimum tensile strength of 75, 000 psi (515 MPa) and a minimum yield strength of 45, 000 psi (310 MPa).
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