ASTM A517 specification covers standard requirements for high-strength quenched and tempered
Alloy steel plates (Grades A, B, E, F, H,P, S, Q) intended for use in fusion welded boilers and other pressure vessels. Several grades of ASTM A517 steel exist, each displaying comparable chemical compositions and mechanical values. Though there are differences, these are minute enough to be negligible for the purposes of this overview. The grade we want to focus on here is ASTM A517 Grade B(A517 Gr B).
ASTM A517 Gr B material is a low-alloy pressure vessel grade rolled steel plate that conforms to A20 manufacturing specifications; in an open-hearth under oxygen or via electric arc production. These plates have a maximum thickness of 32mm and must be subjected to robust heat analysis to verify its elemental composition. Process managers must carefully control the levels of carbon, manganese, phosphorous, sulfur, silicon, chromium, molybdenum, boron, vanadium, and titanium in order to guarantee compliance – thus performance.
Like other low carbon steels, A517 has outstanding tensile and yield properties across a broad operating temperature range. Nominal values for A517 B plates are earmarked at around 928 MPa tensile and 687 MPa yield strengths with just 16% elongation at break. This makes it the ideal alloy for liquid gas storage and transportation.
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