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  • A204GrB
  • A204GrB

A204 Grade B,A204GrB

  • Steel Standard: ASTM A204/A204M
  • Rolling Type: Boiler steel plate,Pressure vessel steel plate
  • Thickness: 6mm-300mm
  • Width: 1500mm-4200mm
  • Length: 3000mm-18000mm
  • Heat Treatment: As Rolled/Normalised/Stress relieved
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■ Overview
Molybdenum alloy boiler steel plate A204 Grade B contains a higher Carbon than boiler steel plate A204 Grade A,so pressure vessel steel plate A204 Grade B ownd a higher yield strength and tensile strength at 485-620 Mpa.The steel for rolling boiler steel plate SA204 Grade B shall be full killed.Besides ultrasonic examination is neccessary,the following test shall be chosed by the end users when ordered:S1 Vacuum treatment,S3 Simulated post weld heat treatment of mechanical test coupons, S5 Charpy V-notch impact test, S7. High temperature tension test.
■ 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 A204GrB alloy steel:

Yield strength (≥Mpa) Tensile strength (Mpa) Elongation in ≥,%
275 485-620 200mm 50mm
17 21
Chemical composition for A204 Grade B alloy steel (Heat Analysis Max%)

Main chemical elements composition of A204 Grade B
Thickness(mm) C Si Mn P S Mo
T≤25 0.20 0.15-0.40 0.90 0.035 0.035 0.45-0.60
25<T≤50 0.23
50<T≤100 0.25
T>100 0.27

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