Dear Manpreet,
Yes, I agree with the above explanation but steel i have one question to you why heat input is supplemetary essential variable in ASME code. where as mechanical propeties like UTS & YS are more affected by heat input as specified in artical attached by Kathalingam babu, so as per attached artical it shall be essential variable.
Kindly suggest.
Regards,
Bhavesh
On Mon, Dec 20, 2010 at 8:29 AM, manpreet <manpreetsin88@rediffmail.com> wrote:
Dear Bhavesh,
With due respect, Heat Input depends on mechanical properties such as Toughness, Tensile and yeild strength and Hardness.
For toughness, it's not certain, to an extent increasing then decreasing, but for others it has monotonic relationship.
With refernce to the steel mentioned, ASTM 516 gr.70 (C-Mn-Si), Tensile strength of Weld metal would decrease due to coarsening of structure and fromation of grain boundary ferrite, When SMAW used, with Higher Heat Input, C-Mn-Si content would reduce therefore, Ultimetaly it would also effect Tensile properties of Weld metal.
If you still disagree with above explanation, Please provide some basis to substantiate your claim.On Sun, 19 Dec 2010 12:18:50 +0530 Bhavesh Patel wrote
Regards
Manpreet Singh
Welding Engineer>> <harishkannepalli@gmail.com>; wrote
>I totaly disagree with manpreet because heat input only affects the
>tougness property of material. As far as i know UTS never depends on
>the welding processes. BHAVESH
>
>On 12/18/10, manpreet <manpreetsin88@rediffmail.com> wrote:
>> Hi, Heat Input is goint to be the key factor in this case, which would be
>> less for GTAW.so for GTAW, there would be more UTS.Due to limited
>> information, this is only thing i can predict, else more info like heat
>> treated condition and weld joint, would be needed.RegardsManpreet
>> SinghWelding EngineerOn Fri, 17 Dec 2010 8:43:49 ,Harish Kannepalli>> 2010/12/16 Shaunak Upadhyay <shanupadhyay@gmail.com>;
>> In theory both will have same UTS. But while testing, slight variation may
>> be there due testing conditions.
>> 1) Material Specifcaiton: SA 516 GR 70 Size: 6.0 mm
>> thk 300 mm Length x 300 mm
>> Width Process: GTAW Consumable: ER70S-22)
>> Material Specifcaiton: SA 516 GR 70 Size: 6.0 mm
>> thk 300 mm Length x 300 mm
>> Width Process: SMAW Consumable: E7018Which test
>> piece have more UTS in these two processes.Regards,Shaunak Upadhyay--To post
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>> regards,
>> Harish.
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>
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