Metric nut yield strengths
Metric nut yield strengths
(OP)
Where can I find the yield strengths of metric class 4, 6, 8, and 10 nuts? I have been able to find proof strengths and hardness, but not yield strengths.
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Metric nut yield strengths
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RE: Metric nut yield strengths
is on that website. Good question.
RE: Metric nut yield strengths
Does this help?
RE: Metric nut yield strengths
Thanks for the lead - I had seen this before - it gives proof strengths and hardness, but not yield strengths. I'm writing software to calculate thread stripping loads / safety factors (among other things), so I need yield strengths.
RE: Metric nut yield strengths
Any material that dosen't have a marked or sudden yield point are given proof stress values.
So the values you are seeing are the nominal stress to create a specified amount of plastic strain the usual values are quoted the produce 0.1%,0.2%,0.5%.
I would use these values with a good safety margin to use for your spreadsheet design.
regards
desertfox
RE: Metric nut yield strengths
http://www..hexagon.de/dose/dose-1e.pdf
RE: Metric nut yield strengths
From PSL Catalogue Page 19
Classification of Bolt Yield Point (MPa) Rp0.2
8.8 10.9 12.9
640 940 1100
I would hope that the nuts would have to be
at least this high. I will keep checking
other resources.
The values that Shigley shows in his book again
is only for the bolts, rivets, sems, etc. and
is as you probably know is that the whole number
represents the utimate tensile x 100
where the decimal is the approximate ratio of
the yield strength to the tensile.
The PSL catalogue shows that the testing strenght
of the nuts must be equivalent to the Tensile
Strength of the Bolts so that is no help either.
Will keep looking. Shigley at least shows the
yield strength for all of the metric grades of
bolts. I am starting to see your dilemna.
Will keep looking!
RE: Metric nut yield strengths
Unclesyd I can't get your link to work.
dimjim your yield stress quoted in your last thread is a proof stress to produce a plastic strain of 0.2% ie:- Rp0.2.
Have a look at this definition of proof stress at this site:-
regards htt
desertfox
RE: Metric nut yield strengths
"Thread Strip Safety according to Dose"
http://www.hexagon.de/
RE: Metric nut yield strengths
Dose's paper is excellent. Thanks for the lead.
RE: Metric nut yield strengths
Good link very informative.
Philrock please note that only proof stresses are given for the bolt materials in unclesyds link not yield stress, however the ultimate tensile strengths are given too.
regards
desertfox
RE: Metric nut yield strengths
http://gltrs.grc.nasa.gov/reports/1990/RP-1228.pdf
RE: Metric nut yield strengths
Instron did have a bunch of information on the testing of fasteners but I've not been able to relocate it.
Click on "More about this category..." at the top of the page.
ht
RE: Metric nut yield strengths
You should specify a nut such that the nut property class matches the bolt property class number preceding the decimal point. I.e., a property class 5 nut goes with a property class 5.8 bolt, a property class 10 nut goes with a property class 10.9 bolt, and so on.