Re: [MW:27553] Rolling/forming method for Gr.91 Plate

Dear sir,

Thanks for your suggestion..

Still i have some query as below.

1. Our dish dia 26", can we make this diameter in crown & petal type.

2. Is hot rolling/bending is better solution for this if it is then what is the recommended temp & precautions for this.

3. Our plate dish cracks multiple locations, is it recommended to weld repair of these cracks, any chances of delayed cracking, please suggest.

Sir your suggestion will be very helpful for us to out of this problem.

  Thanks & regards,

Brajendra Patel

Mob: 7057406907

------ Original message------

From: 'Prakash Hegde' via Materials & Welding

Date: Sat, 24 Mar 2018 10:25

To: materials-welding@googlegroups.com;

Cc:

Subject:Re: [MW:27549] Rolling/forming method for Gr.91 Plate

Hi!

For high alloy steelmaterial edges should be ground and rounded followed by MPT and LPT 

LOADING SHOULD BE GRADUAL and not sudden.during forming

For D.end.it is always better.to go for crown and petal 

Regards

Hegde

Sent from Yahoo Mail on Android

On Fri, 23 Mar 2018 at 15:17, Brajendra Singh

<brajendra1020@gmail.com> wrote:

Dear expert's,

Please share the forming/rolling requirements for A387 Gr.91, we have tried cold forming/rolling of shell & dish end but always cracking.

Attaching photographs for refrence.

Thanks in advance

Regards, 

Brajendra Patel

Mob:+917057406907

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