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  • A299 Grade B
  • A299 Grade B

A299 Grade B,A299GrB

  • Steel Standard: ASTM A299/A299M
  • Rolling Type: Boiler steel plate,Pressure vessel steel plate
  • Thickness: 6mm-300mm
  • Width: 1500mm-4200mm
  • Length: 3000mm-18000mm
  • Heat Treatment: AR/Stress Relieving/Normalized
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■ Overview
ASTM A299 Grade B boiler steel plate 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 SA299 Grade B boiler steel plate when rolling in our steel mill.
■ Full Data
 Technical Requirements & Additional Services:
♦  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
■ Techicals

 ►Mechnical property for A299 Grade B boiler steel:

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 boiler steel (Product Analysis Max%)

Main chemical elements composition of A299 Grade B
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

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