Accreditation Administration System:
Under specification ASTM A299/A299M,there are two pressure vessel steel plate A299 Grade A and A299 Grade B,
and the equal steel grades SA299 Grade A and SA299 Grade B accoring to standard ASME SA299/SA299M.This
standard covers manganese silicon carbon steel plates A299GrA and A299GrB which are mainly used in welded
boilers and other pressure vessels and tanks.For steel plates of SA299 Grade A and SA299 Grade B produced from
coils and furnished without heat treatment or with stress relieving only,the additional requirements,including testing
requirements and the reporting of additional test results shall be applied for A20/A20M.
For pressure vessel steel plates A299 Grade A and A299 Grade B,steel plates for the thickness equal or belows 50
millimeter shall be supplied in the as_rolled delivery condition, except the end user indicate needing normalized or
stress relieved when purchased.Steel plate over 50mm in thickness,the heat treatment have to be done as Normalized.
Else,for steel plate A299GrA and A299GrB using in boiler and pressure vessels,our engineers suggest that all the
plates to be done ultrasonic test and PWHT for improving steel properity and safety when using in high pressure
situiations in yard.
Chemical Composition Max Heat Analysis C Mn P S Si t≤25 25<t t≤25 25<t A299 Grade A 0.28 0.30 0.90/1.40 0.90/1.50 0.035 0.035 0.15/0.40
