SA 105 impact test values

[JCrash]

Just a quick question - I'm looking for criteria for impact testing SA 105 with a 50F MDMT. I've found supplementary requirements for SA 516, but no such parallel for SA 105.

Any guidance would be appreciated.

 

[metengr]

Did you mean -50 deg F MDMT?
Check ASME Section VIII, Div 1 Part UCS.

 

[JCrash]

actually, it is +50 F; it is a pressure containing casing for a motor getting installed very close to the equator.

UCS (in particular UCS-66) has required impact testing for both my SA 516 and my SA 105 materials. I am now trying to figure out what are acceptable values for the impact tests for the 105 material.

I have just stumbled on UG-84, which appears to have average impact values that would apply to both the SA 105 and the SA 516. Does this table correspond to the supplementary requirements in section II?

 

[eliebl]

UG-84 would be the governing values if they are not stated in the material specification.

EJL

 

[metengr]

For SA 105, the reason you don't have Supplemental impact test requirements is that this material is used for ambient and elevated temperature service. Considering your MDMT is only 50 deg F, you have a MINIMUM of 25 ft-lbs at this temperature.

 

[vesselfab]

i'm sorry, perhaps i did not understand correctly.

you say ucs-66 is requiring impacts of 516 & 105 at a mdmt of +50

is this steel 10" thick?

you may want to apply normalizing to get to a different curve.

 

[JCrash]

Close! Not 10 inches, but ~7 in, and the parts are welded together, so it's above the limit of 4 inches per UCS-66. And we are normalizing, but it doesn't matter since the curves can't help us anyway.