ASTM A515/ A515M, identical with ASME SA-515/ SA-515M, is the standard specification for carbon-silicon steel plates primarily used for intermediate- and higher-temperature service in welded boilers and other pressure vessels. Hence, plates manufactured in accordance with ASTM A515, are also called as “intermediate-temperature pressure vessel plates” or “higher-temperature pressure vessel plates”. Plates under this specification are classified into three grades according to its minimum tensile strength ksi [MPa]: Grade 60 [ Grade 415], Grade 65 [Grade 450], Grade 70 [Grade 485]. The maximum thickness of the ASTM A515 plate is limited only by the capacity of the composition to meet the specified mechanical property requirements.
|ASTM A515 Pressure Vessel Plates|
|Element||Gr. 60||Gr. 65||Gr. 70|
|1"< t ≤2"||0.27||0.31||0.33|
|2"< t ≤4"||0.29||0.33||0.35|
|4"< t ≤8"||0.31||0.33||0.35|
The ASTM A515 steel plates shall be killed and made to a coarse austenitic grain size practice. The steel shall have a carburized austenitic grain size of 1 to 5, which imparts the property of intermediate- or higher-temperatures resistance to the steel. ASTM A515 steel plates 50 mm in thickness are normally supplied in the as-rolled condition. The plates may be ordered normalized or stress relieved, or both. Plates over 50 mm in thickness shall be normalized.
Applicable tests for each heat lot of ASTM A516 plates: chemical analysis, tension test, high-temperature tension test, charpy V-notch impact test, drop-weight test, ultrasonic examination, magnetic particle examination, grain-size examination.