ASME SA302GRB steel plate equal to 15CrMoR steel plate

SA302GrB steel plate is one kind Molybdenum alloy steels in ASME SA302/SA302M,SA302 Grade B is totally equal to A302 Grade B in ASTM A302/A302 steel specification.However which steel grade in Chinese steel specification is equivalent to SA302 Grade B steel plate ?

Comparasion mechincal property and chemical composition from the below table,we found 15CrMoR steel plate in steel standard GB/T713 for boiler building used steels is very similar to SA302GRB steel plate.They are all need Mo % above 0.45% when supplying and heat treatment with Normalized.Else,15CrMoR steel plate have more restriction for P% and S% when rolling.

SA302GrB vs 15CrMoR		Chemical composition: Heat Analysis  Max%
Standard	Grade	C	Mn	P	S	Si	Cu	Ni	Cr	Mo
ASME SA302/SA302M	SA302GrB	0.20	0.85-1.20	0.025	0.025	0.15-0.40	-	-	-	0.45-0.6
GB/T 713	15CrMoR	0.08-0.18	1.15-1.50	0.025	0.010	0.15-0.40	0.30	0.30	0.8-1.2	0.45-0.6
Mechanical Properties:		Thickness		Yield strength		Tensile strength
				Mpa  Min.		Mpa
ASME SA302/SA302M	SA302GrB			345		550-690
GB/T 713	15CrMoR	T≤60		295		450-690