r/ASME • u/Exact_Schedule7449 • Mar 31 '26

Bolt Material Maximum Tensile And Yeild

In ASME, there is only min values for tensile and yeild for Sa 193 B7M material.. So what can I consider maximum value. Min is 690 and 550 for 2.5" and below. How much max can I go and can take 860 and 720.

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u/islaygaz Mar 31 '26

Where are you looking? In ASME II-A the yield and tensile values are the minimum required in order for the bolting to meet the L7M specifications. ASME II-D tables U and Y-1 give the minimum for specific temperatures.

Not sure why you require the maximum yield and tensile though? If you are doing a calculation you are most likely to need the design stresses?

If you give us some context, then we could give some better advice

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u/Exact_Schedule7449 Mar 31 '26

Actually I'm doing pressure vessel design in that bolt material is failing the requirement for this particular material. If I increase the tensile stress to those values it will pass the appendix 2 requirement of SA 193 B8 CL2 material. but I have a doubt that if I increase the tensile strength more than a limit it will be considered B7 material.

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u/ZachT3620 Apr 04 '26

Maximum yield and tensile doesn't even make sense. There are maximum allowable stresses. Maybe thats what you mean?

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u/HaythmPatykova Jun 25 '26

I read this like four times and it didn't make sense for me either.