SA302 GrB steel plate and mechanical performance analysis under different quality SA302 grades

1. SA302 GrB plate is a steel plate for pressure vessels that implements the American Standard ASME.

2. The performance of SA302 steel under different quality levels:

Grade	Tensile strength, ksi（MPa）	Category
SA302 GrA	79-95(515-655)	Mn-Mo
SA302 GrB	80-100(550-690)	Mn-Mo
SA302 GrC	80-100(550-690)	Mn-Mo-Ni
SA302 GrD	80-100(550-690)	Mn-Mo-Ni

3. SA302 GrB steel plate chemical composition:

Grade	C	Mn	P	S	Si	Mo
SA302 GrB	0.25	1.07-1.62	0.035	0.035	0.13-0.45	0.41-0.64

4. SA302 GrB steel plate tensile performance:
, Ksi (MPa) yield strength, smaller, Ksi (MPa) SA302 GrB 80-100 (550-690) 50 (345) 18

Grade	Tensile strength, Ksi（MPa）	Yield strength, min., Ksi（MPa）	elongation,%
SA302 GrB	80-100（550-690）	50（345）	18

5. Heat treatment: hot rolling, normalizing, normalizing + stress relief.