Selection of Plate material
Selection of Plate material
(OP)
Hi Friends,
We have plate material available for Pressure vessel and spectacle blinds as A515 and A516 and in that we have several grades like in A516 we have 55, 60, 70. I want to use this plate material for spectacle blinds for 51.1barg pressure and 427 deg. temp.
Anyone can suggest the basis for selecting the grade.
Thanks
We have plate material available for Pressure vessel and spectacle blinds as A515 and A516 and in that we have several grades like in A516 we have 55, 60, 70. I want to use this plate material for spectacle blinds for 51.1barg pressure and 427 deg. temp.
Anyone can suggest the basis for selecting the grade.
Thanks





RE: Selection of Plate material
RE: Selection of Plate material
RE: Selection of Plate material
RE: Selection of Plate material
1. Graphitization
If the 427C is based on the nommal operating condition, the material should be upgraded to Cr-Mo steel (e.g., 1-1.25Cr-0.5Mo steel) to avoid graphitization.
(See API 579-1/ASME FFS-1)
2. Creep-Rupture
If the nommal operating temperature is above 370C, the material will be exposed to creep zone. In this case, A515 which has a large grain size is preferable.
3. Welding
Once it is non-weldable material (e.g., Blind), the higher tensile strength is better. If it is weldable component in non-corrosion cracking environment, Gr.70 is preferable. However, if it is weldable component in corrosion cracking environment, Gr.60-65 is preferable.
Hope this helps,
Thomas Eun
RE: Selection of Plate material
RE: Selection of Plate material
Thanks all...Mr. Thomas I agree with you...
The design temp. is 427 deg C