Please note the following.
For tensile test :
1) check the dimension of test bar i.e gauge length, dia/thk, parallel length. Dimensions shall be within tolerance as per applicable spec. I have experieced that if we don't maintain the dimension right then we will get erratic results.
2) If proof stress is required then mfr. shall have suitable extensomenter. Don't allow micrometer in place of extensomenter. Remember here we require strain gauging device and micrometer can't do that.
3) TS, YS calculation shall be carried out as per actual crosssectional area.
4) Please determine for which G.L, % elongation to be determined and maintain that G.L only.Reduced size test piece is allowed, but for that use the relevant spec.
5) Verify the calibration certificate of UTM and check the calibration report of extensometer.
6) verify stress strain characterisitics vide stress strain graph.
7) Monitor the UTL, Y.L during the testing and verify the gauge length, reductiOn of dia after testing.
8) Test piece identification by hard puniching is must of client/TPI/Mfr.
9) If any heat treatment is involved then whether it has been carried out along with testpiece or not.
For Impact test:
1) check the calibration record of impact testing machine
2) Check the error before starting the test.
3) Before starting the test, check the dimension of the test piece and mfr. shall have the profile projector for checking the profile of V notch.
It is must. since Impact test is sensitive to notch profile.
4) You shall know at which temp. you need to carry out the test and howmuch tolerance of temp. is allowed.Please verify with relevant spec.
5) after attaining the temp. don't hurry up, give atleat 5 min. time after attaining the temp. also note that minimum time shall be taken by the operator during taking out the piece from the bath to test anvil may 5sec.
6) You shall know whether there is requirement of transition curve, shear area, lateral expansion.
7) client/TPI/mfr.hard punching and test piece identification is must.
8) If any heat treatment is involved then whether it has been carried out along with testpiece or not.
9) You need to know what is the meaning of min. avg.value. You may get this from ASTM A 370
With Regards,
Rutvik
Sr.Surveyor
TATA Projects Ltd.
--- On Sun, 16/5/10, kalyan <metallurgist1976@gmail.com> wrote:
> From: kalyan <metallurgist1976@gmail.com>
> Subject: [MW:5182] Re: Impact on materials
> To: "Materials & Welding" <materials-welding@googlegroups.com>
> Date: Sunday, 16 May, 2010, 5:44 AM
> Hi,
>
> what are all the things to consider while doing tensile and
> impact
> testing.
> i want to be aware and not get cheated.
>
> regards
> kalyan
>
> On May 7, 1:46 am, hpi001 <pieper-...@kpnmail.nl>
> wrote:
> > Dear Praphulla,
> >
> > The materials you may use are specified in the so
> called AD2000 W
> > pages. For example when you are building a pressure
> vessel with
> > unalloyed steel you must use AD2000-Merkblatt W1. If
> you look at
> > chapter 2 of this specification you can find all the
> materials
> > according to EN specifications you may use for such
> pressure vessels.
> > But it is not limited to the materials specified.
> Under 2.6 you can
> > see the requirements for materials not listed. If you
> want to use
> > other materials (meeting the requirements of 2.6) the
> notified body
> > need to give a single approval for the use. So it is
> possible to use
> > ASTM material but it's less complex when using
> materials listed in the
> > AD2000 Merkblatter. Beside the requirements for
> materials in W-pages
> > the materials and manufacturer also should met the
> requirements of
> > AD2000 Merkblatt W0 given in the chapters 2 and 3 of
> this W0
> > specification. This includes also that a manufacturer
> need to have a
> > quality assurance system (like ISO 9001) approved by a
> notified body
> > accepted by the PED 97/23/EG guidelines.
> > So in my opinion it is better to buy material from a
> AD2000 Merkblatt
> > approved manufacturer because in that case you are
> sure that all the
> > requirements are full filled (if the material ordered
> is within the
> > qualification range of the manufacturer). On the
> material certificates
> > 3.1 according to EN 10204 the manufacturer has to
> specify that the
> > material met the requirements of the applicable AD2000
> - W page as
> > well as for the European Pressure Equipment Directive
> 97/23/EG.
> > If this is the case than you don't have to worry about
> that.
> >
> > Best Regards,
> >
> > Herman Pieper
> >
> > On 6 mei, 15:54, "Praphulla Phirke" <praphulla...@gmail.com>
> wrote:
> >
> >
> >
> >
> >
> > > Hi All,
> >
> > > I have to use AD 2000 code for a pressure vessel
> design and this is the
> > > first time I am using this code. Does it have any
> limitations on materials
> > > to be used ? or we can go for ASTM materials
> also?
> >
> > > Thanks & Regards
> >
> > > Praphulla
> >
> > > praphulla...@gmail.com
> >
> > > --
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> members personel views and meant for educational purposes
> only, Users must take their own decisions w.r.t. applicable
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> >
> > --
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> > The views expressed/exchnaged in this group are
> members personel views and meant for educational purposes
> only, Users must take their own decisions w.r.t. applicable
> code/standard/contract documents.- Hide quoted text -
> >
> > - Show quoted text -
>
> --
> To post to this group, send email to materials-welding@googlegroups.com
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> For more options, visit this group's bolg at http://materials-welding.blogspot.com/
> The views expressed/exchnaged in this group are members
> personel views and meant for educational purposes only,
> Users must take their own decisions w.r.t. applicable
> code/standard/contract documents.
>
--
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To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com
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The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.
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