A204GrB STEEL PLATE

Molybdenum alloy A204GrB steel plate,A204GrB steel sheet,A204 Grade B contains a higher Carbon than A204 Grade A steel plate,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.

Technical Requirements & Additional Services for A204 Grade B 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 A204GrB steel plate:

Yield strength (≥Mpa)	Tensile strength (Mpa)	Elongation in ≥,%
275	485-620	200mm	50mm
		17	21

 
►Chemical composition for A204 Grade B steel plate (Heat Analysis Max%)

Main chemical elements composition of A204 Grade B steel plate
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