SA 516 Gr 70 instead of SA 105 as stiffner material

Please elaborate, because those are two different product forms:

• SA516-70 is plate
• SA105 is for piping forgings

Also, which code are you designing to?

Maximum temperatures:

• Section I: 454 °C
• Section III: 371 °C
• Section VIII-1 & -2: 538 °C

And note that at 400 °C SA516-70 is within the creep range and possible prone to graphitization.

Dear XMech, you are right, and I like to add:

• ASME SA516 is carbon steel for pressure vessel plates, for moderate-and lower temperature service, where ASME SA515 is carbon steel for pressure vessel plates, for intermediate-and higher temperature service.

• For ASME SA105, I prefer to use another material for higher temperature service like as ASME SA182 for forged or rolled alloy and stainless steel pipe flanges, forged fittings, and valves and parts for high temperature service.

CS PLATE MATERIAL ASTM A 516 GRADE70 THE METULLURGICAL PROERTIES TENSILE STRENGTH, SHEAR STRENGTH AND YIELD STRENGTH IS REQUIRED TO CALCULATE FATIQUE / FAILURE OF SPHERE VESSEL