Re: [MW:17172] HAZ hardness

Strength is a function of grain size .It is in proportion to grain size to the power of minus half.

Please ref, http://neon.mems.cmu.edu/rollett/27301/L5A_GrainSize_HallPetch_05Oct07.pdf.

S C Balawat.

Sent from my iPad

On Mar 20, 2013, at 11:57 AM, Shashank Vagal <nach_sam@yahoo.com> wrote:

Gents, HAZ  is inherently made of coarse grained structure wrt the rest of the areas - meaning more brittle and hard. Hence more hardness there, But if a PQR is OK, this excess hardness automatically falls in acceptable category. As regards heat input and HAZ hardness, if you keep close to the higher HI range value, you will end with a lower HAZ hardness due to relatively slower cooling. SV --- On Tue, 19/3/13, james gerald <gerry_tup@yahoo.com> wrote: From: james gerald <gerry_tup@yahoo.com> Subject: Re: [MW:17156] HAZ hardness To: "materials-welding@googlegroups.com" <materials-welding@googlegroups.com> Date: Tuesday, 19 March, 2013, 1:07 PM Hardness is a function of chemical composition and thermal treatment. Normally HAZ hardness shall be within the range for the grade specified similar to that of basematerial.   HAZ is subjected to different peak temperatures and thermal cycles, hence the Hardness of the HAZ will be higher but shall be controlled by welding conditions.   Thanks & Regards J.Gerald Jayakumar 0091-9344954677 From: Nasief Navsa <NNavsa@flexonics.co.za> To: "materials-welding@googlegroups.com" <materials-welding@googlegroups.com> Sent: Tuesday, March 19, 2013 11:31 AM Subject: RE: [MW:17153] HAZ hardness Hi All,   I'd like to ask a question along these lines as well. If one should compare the hardness of the HAZ with the hardness of the material, what would be the ideal condition of the?   Regards,   Nasief   From: materials-welding@googlegroups.com [mailto: materials-welding@googlegroups.com ] On Behalf Of Hrushikesh Sangamnerkar Sent: 18 March 2013 04:51 PM To: materials-welding@googlegroups.com Subject: [MW:17145] HAZ hardness   Dear sir,   Why is the Hardness of HAZ higher than that of Weld?     Thanks and Regards, Hrushikesh H Sangamnerkar 09724738118 -- To post to this group, send email to materials-welding@googlegroups.com To unsubscribe from this group, send email to materials-welding+unsubscribe@googlegroups.com For more options, visit this group's bolg at http://materials-welding.blogspot.com/ http://www.linkedin.com/groups/MaterialsWelding-122787?home=&gid=122787&trk=anet_ug_hm   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. --- You received this message because you are subscribed to the Google Groups "Materials & Welding" group. To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.     -- To post to this group, send email to materials-welding@googlegroups.com To unsubscribe from this group, send email to materials-welding+unsubscribe@googlegroups.com For more options, visit this group's bolg at http://materials-welding.blogspot.com/ http://www.linkedin.com/groups/MaterialsWelding-122787?home=&gid=122787&trk=anet_ug_hm   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. --- You received this message because you are subscribed to the Google Groups "Materials & Welding" group. To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.     -- To post to this group, send email to materials-welding@googlegroups.com To unsubscribe from this group, send email to materials-welding+unsubscribe@googlegroups.com For more options, visit this group's bolg at http://materials-welding.blogspot.com/ http://www.linkedin.com/groups/MaterialsWelding-122787?home=&gid=122787&trk=anet_ug_hm   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. --- You received this message because you are subscribed to the Google Groups "Materials & Welding" group. To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.

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