Bolting Temperature Ratings 2

[TurbineDoctor]

I'm having problems in finding the recommended temperature ratings for the following bolts; note that I've downloaded the applicable ASTM documents, but found only vague information:

N Drawing ASTM Material Head Marking

N14 A354 Gr BD Alloy Steel 6 Radial Lines
N14A A193 Gr B8M Cl2 AISI 316 B8M

Also, is there any standard definition for the range of temperature ratings?

 

[metengr]

Yes, depending on the specific application. For example, ASME B31.1 Power Piping, Appendix A, Table A-2 provides a listing for bolts, nuts and stud material that included allowable stress and service temperature.

ASTM A 193 B8M Class 2, the maximum temperature for use in flanged joints is 750 deg F.

ASTM A 354 Grade BD, the maximum temperature is 650 deg F.

 

[TurbineDoctor]

Thank you very much for your prompt and insightful response!