Clad plate heat treatment as per SA 264 after explosion bonding

[krishna mudhale]

Dear experts,
Please clarify our issue ie. In our case clad plate(SA 387 Gr.11
Cl.1+SS 304L), as per our customer spec. Heat treatment of the clad
plate shall be as per applicable clad plate material specification
ie.SA 264 . But our clad plate manufacturer insists that for higher
thickness clad plates heat treatment is not required(ie.46,54,75Thk) &
for lower thickness he will perform heat treatment(ie.24&28Thk). So my
question is as per SA 264 is heat treatment is required or not for
clad plates after explosion bonding and if required which type of heat
treatment is required.
Please clarify my query & thanks in advance for your valuable feedback.
--
With Warm Regards
Krishna Mudhale

[sachin sankhe]

Dear Krishna

Heat treatment is required only if base material require heat treatment or if cladding is done with chromium stainless steel

In your case lining is by ASS and hence one requirement is ruled off.Check if any process requirement for heat treatment of base metal otherwise heat treatment is not required

Further check for mechanical properties of claded plate coupon if they are within limit of base metal requirement then heat treatment is not required to be carried out

Regards

Sachin.Sankhe

From: krishna mudhale <kmud...@gmail.com>
Sent: Fri, 27 Sep 2013 22:06:29
To: material...@googlegroups.com
Subject: [MW:18785] Clad plate heat treatment as per SA 264 after explosion bonding
Dear experts,
Please clarify our issue ie. In our case clad plate(SA 387 Gr.11
Cl.1+SS 304L), as per our customer spec.  Heat treatment of the clad
plate shall be as per applicable clad plate material specification
ie.SA 264 . But our clad plate manufacturer insists that for higher
thickness clad plates heat treatment is not required(ie.46,54,75Thk) &
for lower thickness he will perform heat treatment(ie.24&28Thk). So my

question is as per SA 264 is heat treatment is required or not forar

clad plates after explosion bonding and if required which type of heat
treatment is required.
Please clarify my query & thanks in advance for your valuable feedback.
--
With Warm Regards
Krishna Mudhale

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[george....@gr.bureauveritas.com]

The issue is the following:

The explosion bonding process will affect the properties of the 304 austenitic s.s?

With other worlds: the explosion bonding will lead to a precipitation of the chromium carbides and therefore a solution annealing heat treatment will be necessary to get a solution of those carbides in the 304 matrix?

Can your material manufacturer guarantee the properties of 304 without heat treatment?

Could you ask for the parameters of the explosion bonding process?
Could your manufacturer give you the temperatures which develop during this process and the relevant time periods?

 

best regards

Dr. Georgios Dilintas

Authorized Nuclear Inspector
Authorized Inspector Supervisor
API 510 Inspector
Prelude FLNG ASME Subject Matter Expert

I&F REGIONAL TECHNICAL MANAGER
BUREAU VERITAS HELLAS

Tel: +30 210 40 63 113/4
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krishna mudhale ---27/09/2013 19:36:38---Dear experts, Please clarify our issue ie. In our case clad plate(SA 387 Gr.11

From: krishna mudhale <kmud...@gmail.com>
To: material...@googlegroups.com
Date: 27/09/2013 19:36
Subject: [MW:18785] Clad plate heat treatment as per SA 264 after explosion bonding

Sent by: material...@googlegroups.com

---

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[nishant nair]

Hi there Mr. Krishna, Well as far as the heat treatment is concerned no deviation from d standard should be accepted. So please be firm on that account if applicable. Explosion bonded plates can be separately heat treated before explosion bonding and which I think is a feasible option. Reason I think is due to difference of heat treatment procedures of two different metals i.e. annealing and normalizing. This is accepted by SA264 standard also. Pls go through. Nothing is mentioned regarding the heat treatment of explosion bonded plate in the standard. Thanks and regards, Nishant Nair Sent from Yahoo! Mail on Android

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From: george....@gr.bureauveritas.com <george....@gr.bureauveritas.com>;
To: <material...@googlegroups.com>;
Subject: Re: [MW:18817] Clad plate heat treatment as per SA 264 after explosion bonding
Sent: Mon, Sep 30, 2013 12:30:00 PM

[Vishal Sharma]

Hello Mr. Krishna,

As per my interpretation of clause 5.2.3 of SA-264 heat treatment is required for grain refinement of base material if plates are to be cold formed.

In your case normalizing is preferable followed by tempering treatment. And please check in client's specification also.

Please correct me if I am wrong.

Thanks & Regards,

Vishal Sharma

(Mo.)  +91-8905999951      

[nshet...@gmail.com]

Hi

Heat treatment of a explosion bonded plates can be done. There wont be any problem with respect to precipitation.  We have done SA 516 gr 70 + 316 L plate nd we have done it for higher thickness plates where the base is 85 +3 mm clad nd after final fabrication the vessel is pwht. Thickness lower than 40 mm will need pwht after explosion bonding since to improve the tensile values and remove the stress due to explosion bonding. The heat treatment after explaosion will be based on the thickness nd to a max of 30 min to 45 min. 

Regards

Nitin Shetty

Sent from Samsung Mobile

[george....@gr.bureauveritas.com]

How do you avoid sensitazation of 316?
Best regards
Dr Georgios Dilintas

Authorized Nuclear Inspector
Authorized Inspector Supervisor

HBS Regional Technical Manager

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