Need a book? Engineering books recommendations...

Return to index: [Subject] [Thread] [Date] [Author]

Re: Grade 8 bolts in place of A325 bolts

[Subject Prev][Subject Next][Thread Prev][Thread Next]
The material properties for this type of bolt (SAE J429) for grades 2,5 and
8 can be found on the following web site:

www.americanfastener.com/techref/capscrew.htm

Good luck.

------------------------------------------------------------------------

"Ritter, Mike" wrote:

> My understanding is that a Grade 5 is about equivalent to a 325, and
> that a Grade 8 is more equivalent to a 490.  That has always been a rule
> of thumb.  I looked in a book that we have called "Fastener Standards",
> 6th Ed., by the Industrial Fasteners Institute.  This reference has a
> Table called "Mechanical Requirements for Carbon Steel Externally
> Threaded Fasteners...it gives the following information:
>
> SAE Gr. 5       1/4" to 1"              Proof Load Stress = 85 ksi;
> Yield Strength (min) = 82 ksi; Tensile Strength (min) = 120 ksi
> SAE Gr. 5       1-1/8" to 1-1/2"                Proof Load Stress = 74
> ksi; Yield Strength (min) = 81 ksi; Tensile Strength (min) = 105 ksi
> A325            1/2" to 1"              Proof Load Stress = 85 ksi;
> Yield Strength (min) = 92 ksi; Tensile Strength (min) = 120 ksi
> A325            1-1/8" to 1-1/2"                Proof Load Stress = 74
> ksi; Yield Strength (min) = 81 ksi; Tensile Strength (min) = 105 ksi
>
> SAE Gr. 8       1/4" to 1-1/2"          Proof Load Stress = 120 ksi;
> Yield Strength (min) = 130 ksi; Tensile Strength (min) = 150 ksi
> A490            1/2" to 1-1/2"          Proof Load Stress = 120 ksi;
> Yield Strength (min) = 130 ksi; Tensile Strength (min) = 150 ksi (170
> ksi, max)
>
> I believe I copied all the numbers correctly, but somebody might double
> check me.  Hope this helped.
>
> Michael Ritter, PE
>
> > -----Original Message-----
> > From: AnandNene(--nospam--at)aol.com [SMTP:AnandNene(--nospam--at)aol.com]
> > Sent: Tuesday, November 09, 1999 11:42 AM
> > To:   seaint(--nospam--at)seaint.org
> > Subject:      Grade 8 bolts in place of A325 bolts
> >
> > Can someone give me reference to the properties of Grade 8 bolts?
> >
> > Shop has requested for use of Grade 8 bolts in place of A325 bolts.
> > These
> > are 1/2" dia. bolts for equipment attachment.
> >
> > Anand Nene
> > ANSE
> > Consulting Structural Engineers
> > 1624 Franklin Street
> > Suite 1200
> > Oakland, CA 94612-2824
> >
> > Tel:        (510)-893-3464
> > Fax:    (510)-893-3466
> > e-mail: anandnene(--nospam--at)aol.com
> >
>