Re: [MW:8843] Reducing hardness of EN-24 material.

Hi,

 At ist alone Normalizing doesn't reduce hardness,
You need to temper the material EN-24 below lower critical transformation temperture, that will reduce hardness to much lesser value.

Also when welding with SA 516 Gr. 70 plate, Preheat to be maintained during the welding.

For welding  unequal thickness plates, Please specify design code.

Regards
Manpreet Singh
Welding Engineer




On Mon, 20 Dec 2010 10:29:17 , Priya Deshmukh <piyuwillseeu@gmail.com> wrote

Dear All,

 

Thank you for your valuable reply. I have taken a note of your answers.

 

The main reason to reduce the hardness of EN-24 flat is, I want to weld it at some locations. But the welding is getting cracked.

 

I have just taken a sample and done Normalising of it.

 

The hardness values before Normalising are: 249, 244 HBW.

 

The hardness values on the same points after Normalising are: 404, 415 HBW.

 

The main problem is to weld the EN-24 flat (40 X 16mm thk.) with SA 516 Gr. 70 plate (6mm thk.).

 

Please tell me the solution for the same.

 

Thanks & Regards,

 

Priyanka Deshmukh.

On Sun, Dec 19, 2010 at 5:48 PM, Shashank Vagal <nach_sam@yahoo.com> wrote:

Please specify: You intended to reduce hardness from what  to what values? On what basis? Why did you choose Normalising, what exactly did you do? What you needed was Annealing in principle. But still a lot needs to be put together... --- On Sun, 19/12/10, Priya Deshmukh <piyuwillseeu@gmail.com> wrote: From: Priya Deshmukh <piyuwillseeu@gmail.com> Subject: [MW:8800] Reducing hardness of EN-24 material. To: materials-welding@googlegroups.com Date: Sunday, 19 December, 2010, 12:21 PM Dear All,   I wanted to reduce the hardness of EN 24 material. For that I employed Normalising on the material.   But the hardness increased instead of reducing.   Can U please suggest me the reasons for this and how to reduce the hardness of the material.   Thanks & Regards,   Priyanka Deshmukh.   -- 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/ 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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--
Priyanka Deshmukh,
Quality Control Engineer,
Transparent Energy Systems Pvt. Ltd.

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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.