Mo alloy material SA204 Grade B steel plate and SA204 Grade A steel plate

Mo alloy material SA204 Grade B steel plate and SA204 Grade A steel plate mainly used to make the reactor,heat exchanger,refinery,spherical tank,hydropower station and pressure vessels.Molybdenum in heat analysis shall be within 0.45-0.60 % in chemical composition for SA204 Grade B steel plate and SA204 Grade A steel plate.However,ASME SA204 Grade B steel plate owned a higher yield strength as 275Mpa and tensile strength within 485-620 Mpa than SA204 Grade A steel plate.

Steel raw materials of SA204 Grade B and SA204 Grade A steel plate shall be in accordance with ASME SEC.II PART A EDITION 2019 and materials to be fully killed and fine grain.Our stock for SA204 Grade B steel plate with thickness from 5mm-125mm,width 200-3000mm,and length belows 18000mm.

Chemical composition and Mechanical properties for SA204 Grade B steel plate and SA204 Grade A steel plate:


 

SA204 Grade B vs SA204 Grade A		Chemical composition: Heat Analysis  Max%
Standard	Grade	C	Mn	P	S	Si	Cu	Ni	Cr	Mo
ASME SA204/SA204M	SA204 Gr.B	0.20	0.90	0.035	0.035	0.15-0.40	-	-	-	0.45-0.6
ASME SA204/SA204M	SA204 Gr.A	0.18	0.90	0.035	0.035	0.15-0.40	-	-	-	0.45-0.6
Mechanical Properties:		Thickness		Yield strength		Tensile strength
				Mpa  Min.		Mpa
ASME SA204/SA204M	SA204 Gr.B	ALL		275		485-620
ASME SA204/SA204M	SA204 Gr.A	ALL		255		450-585