SA106 GR.B vs SA106M GR.B 1

[abangbikerz]

Whats the difference between SA106 GR.B vs SA106M GR.B. I think there is no problem using SA106M for parts requiring SA106 as they both are under same category in ASME II part A. The drawing states SA106 Gr.B, but we use SA106M Gr.B for nozzle pipe.
The problem is my joint review is near and they may ask me this question to gauge my ability. I just need to know if it is ok to substitute this material based on the reference from the codebook.

 

[Surachai]

M is stand for metric. Materials certified to either U.S. customary or SI may be used regardless of the unit system used in design. Reference can be found in the Code book e.g. U-4 of ASME Section VIII Div.1

I hope this may help

 

[blaqesmith]

yes Mr Surachi is right

 

[abangbikerz]

Thank you surachai