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Bolting Temperature Ratings
2

Bolting Temperature Ratings

Bolting Temperature Ratings

(OP)
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?

RE: Bolting Temperature Ratings

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.

RE: Bolting Temperature Ratings

(OP)
Thank you very much for your prompt and insightful response!

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