Thursday, March 10, 2011

Re: [MW:10257] RE: 10158] Re: THROUGH THICKNESS DUCTILE TESTING

On 3/7/11, Kristian Lund Jepsen (KUJ) <KUJ@ramboll.com> wrote:
> The reason to require tests to EN 10164 (for example Z-35 test) is to verify
> the strength and ductility in the z-direction (out-of-plane). Z-35 is
> basically a minimum elongation from the yield point to fracture of 35%. It
> guarantees that the integrity is OK even when we may have plastic
> deformation in the out-of-plane direction.
>
> Such tests are usually required for heavy wall thickness (>40 mm) when the
> steel plate or section is used in construction with joints/nodes with very
> high utilization of the steel out-of-plane. For example for plates or beams,
> where lifting lugs are welded to. But it may also be relevant to many other
> joints, depending on the structural design (and design calculations).
>
> Otherwise, if only lamination may be the problem (and for plates betwenn 6
> mm and 40 mm thickness, requiring "z-properties", lamination checks are
> carried out by ultrasonic scanning according to EN 10160.
>
> regards
> Kristian
>
> -----Original Message-----
> From: materials-welding@googlegroups.com
> [mailto:materials-welding@googlegroups.com] On Behalf Of hpi001
> Sent: 5. marts 2011 19:04
> To: Materials & Welding
> Subject: [MW:10158] Re: THROUGH THICKNESS DUCTILE TESTING
>
> Dear Manoj,
>
> This requirement should be taken in account when purchasing steel plates.
> Executing a normalizing heat treatment afterwards on rejected plates will
> normalize your material structure but mostly not dissolve the present
> manganese sulphite inclusions which often causes not satisfying the required
> % RA. So in such case in my opinion you need to order new material with the
> required Z quality mentioned in your purchase order.
>
> Best Regards,
>
> Herman Pieper
>
> On Mar 4, 6:02 pm, manoj john <manojac...@gmail.com> wrote:
>> Thank you Mr.Muthusrinivasan Muthuselvam for your information.  I got
>> a plate of thicnkness 125 mm, material S 275 JR . The certificate
>> shows only tensil and chemical properties and not mentioned anything
>> about heatreatment. I doubt whether this plate pass the through
>> thickness ductile test.  If it fails in teting what should be the next
>> action means whether normalizing will improve the properties?
>>
>> Thanks
>> Manoj
>> On Thu, Mar 3, 2011 at 10:25 AM, muthusrinivasan muthuselvam <
>>
>>
>>
>>
>>
>>
>>
>> msm...@gmail.com> wrote:
>> > Dear Mr.Manoj..
>>
>> > Reference standard in Euro norms En10164-- there you willget the
>> > total details including test specimen preparation..
>>
>> > Client has to specify whether they need Z15 or Z 25 or Z 40 etc..
>>
>> > specimens has to be prepared like tensile specimen but location is
>> > through the thickness and the same will be tested like ultimate
>> > tensile stressing but the accepance criteria is not the ultimate
>> > load.. acceptance criteria is the (original diameter -distorted
>> > diameter)/original diameter in %
>>
>> > br,
>>
>> > msms
>>
>> >  On Wed, Mar 2, 2011 at 1:45 PM, manoj john <manojac...@gmail.com>
>> > wrote:
>>
>> >>   Dear members,
>>
>> >> One of my client technical specification calls for through
>> >> thickness ductile testing for plate thickness above 40 mm.
>>
>> >> Can you give information about through thickness ductile testing &
>> >> why we need to carry out this testing?
>>
>> >> With kind regards.
>> >> Manoj
>>
>> >> --
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>>
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>
> --
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> The views expressed/exchnaged in this group are members personel views and
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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.
>

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