Tensile strength for PQR qualification of ASTM A519 Gr4130 material

[Aby Jose]

Dear experts,

I am conducting a PQR for ASTM A 519 Gr 4130 QT pipe material.When I checked A519 standard it is giving the tensile strength values for 4 conditions only. Hot rolled/stress relieved/Annealed/Normalised.But in the material mtc I cannot find any details regarding the condition. It is given as Quench tempered only. The UTS of the parent material in mtc is 728mpa.

 As per PWPS  I have done PWHT after welding. When I did the tensile test ; ductile fracture occured in the parent material with a UTS of 683. 

What is the minimum tensile strength required for the PQR to get accepted?

Regards,

Jose

[Kannayeram Gnanapandithan]

It is normalised, Q&T. For stress relieving, follow manufacturers recommendation

On 10-Sep-2017 6:20 pm, "Aby Jose" <abyc...@gmail.com> wrote:

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[Aby Jose]

Sir, 

How can we say that it is normalised, Q&T??  For Q&T should it be normalised??

[Harish Kannepalli]

Hi,

    First of all please remember that these are engineering steels, which means the mechanical properties can be adjusted as per customer requirements. So to qualify the procedure you should first simulate the PWHT parameters on the raw material and test the mechanical properties. Then weld the material, do PWHT and test it.

Hope this clarifies.

Thanks & Regards,
Harish

[Kannayeram Gnanapandithan]

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THANKS & BEST REGARDS,

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CONSULTANT-WELDING & QUALITY

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On Sun, Sep 10, 2017 at 11:09 PM, Aby Jose <abyc...@gmail.com> wrote:

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Sir, 

How can we say that it is normalised, Q&T??  For Q&T should it be normalised??

On Sun, Sep 10, 2017 at 6:42 PM, Kannayeram Gnanapandithan <kgpan...@gmail.com> wrote:

[Aby Jose]

Dear Harish,

Here the material is supplied by client and it has been in the yard for some time. I just wanted to know what is the required tensile strength for the PQR.

Regards,

Jose