A299 Grade B STEEL PLATE

A299 Grade B,A299GrB steel plate,A299GrB steel sheet stock with minimum yield strength above 325 Mpa,and tensile strength within 550-690 Mpa.Comparing with pressure vessel steel plate A299 Grade A,yield strength above 290 Mpa and tensile strength within 515-655 Mpa,pressure vessel steel plate SA299 Grade B owned a higher values.Additional technical requirements for boiler steel plates SA299 Grade B such as simulated post-weld heat treatment,low temperature impcting test,drop weight test and high temperature tension test.Ultrasonice test have to be done for A299 Grade B steel plate when rolling in our steel mill.

 Technical Requirements & Additional Services for A299GrB steel plate:
♦  High tension test
♦  Low temperature impacting test
♦  Normalised for thick plates over 40mm
♦  Simulated post-welded heat treatment (PWHT)
♦  Rolling under standard NACE MR-0175 (HIC+SSCC)
♦  Issued Orginal Mill test certificate under EN 10204 FORMAT 3.1/3.2
♦  Shot blasting and Painting,Cutting and welding as per end user’s demands

 ►Mechnical property for A299 Grade B steel plate:

Thickness (mm)	Yield strength (≥Mpa)	Tensile strength (Mpa)	Elongation in ≥,%
T≤25	325	550-690	200mm	50mm
25<T	310		16	19

 ►Chemical composition for A299 Grade B steel plate (Product Analysis Max%)

Main chemical elements composition of A299 Grade B steel plate
Thickness(mm)	C	Si	Mn	P	S
T≤25	0.28	0.13-0.45	0.84-1.52	0.035	0.035
25<T	0.30		0.84-1.62