Query Regarding Heat Treatment of Test Specimen ucs-85

[shaikh ahmed]

Dear Sir,

 

Kindly Suggest.

 

if plate is normalized SA-516-70,dish head 2.1 is cold formed and then head is normalized due to extreme fiber elongation. do we need test secimens be tested to satisfy UCS-85?

 

waiting.

 

kind regds,

Shaikh Ahmed

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

Yes
Best regards
Dr Georgios Dilintas
Authorized Nuclear Inspector
Authorized Inspector Supervisor
HBS Regional Technical Manager

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[Jignesh Desai]

In your case, dish end shall be simulated for one normalising cycle as this heat treatment is above the upper critical temperature (AC3).

ASME Sec VIII - Div I, UCS-85  (f) Materials conforming to one of the specifications listed in P.No. 1 Group Nos. 1 and 2 of QW 422 and all carbon and low alloy steels used in the annealed condition as permitted by the material specification are exempt from the requirements of (c) when the heat treatment during fabrication is limited to post weld heat treatment at temperatures below the lower transformation temperature of the steel. This exemption does not apply to SA-841.

Few useful interpretation.

Interpretation: VIII-1-10-43

Subject: UCS-85, PWHT of Mechanical Test Coupons (2010 Edition)

Date Issued: September 22, 2011

File: 11-937

Question: A pressure vessel shell made of P-No. 1, Group 2 carbon steel that has been normalized by the mill is used to construct a welded pressure vessel subjected to postweld heat treatment in compliance with the rules of UCS-56 during fabrication. Are the additional requirements for mechanical property testing prescribed by UG-85 and UCS-85 applicable to this material?

Reply: No. See UCS-85(f).

Interpretation: VIII-1-13-04

Subject: UCS-85(f) and UG-84(f)(2), PWHT Exemption (2010 Edition, 2011 Addenda)

Date Issued: December 18, 2012

File: 11-83

Question: In UG-84(f)(2), does the reference to UCS-85 and the included provisions of UCS-85(f) allow the weld metal and HAZ impact test specimen sets removed from the weld test coupon to be impact tested without applying simulated heat treatments representing PWHT below the lower critical temperature?

Reply: No.

Regds/Jignesh

On Monday, 18 August 2014 18:38:13 UTC+5:30, George Dilintas wrote:

Yes

 

Best regards
Dr Georgios Dilintas
Authorized Nuclear Inspector
Authorized Inspector Supervisor
HBS Regional Technical Manager

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  From: shaikh ahmed [ahmed...@gmail.com]
  Sent: 08/18/2014 12:47 PM ZE5B
  To: materials-welding@googlegroups.com; Karthik <karth...@yahoo.com>; George Dilintas
  Subject: [MW:21651] Query Regarding Heat Treatment of Test Specimen ucs-85

Dear Sir,

 

Kindly Suggest.

 

if plate is normalized SA-516-70,dish head 2.1 is cold formed and then head is normalized due to extreme fiber elongation. do we need test secimens be tested to satisfy UCS-85?

 

waiting.

 

kind regds,

Shaikh Ahmed

--

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[Janagan Thulasi]

Hi all,
        we are using 7c27mo2 material for hardening. material thickness is 0.300 mm. Hardening at 1040c Heating ramp 95 minutes and soaking exactly 10 minutes.
Hardness what we achieved is 640 - 650 HV and Yield strength is around 1400-1450 Mpa and Tensile strength is 1900 Mpa. Here the problem is some of the lots attain more than1900 Mpa of Tensile strength but some lots are fail to attain 1900 Mpa.

Process Details:
 Hardening - 1040C Heating ramp around 11C per min.
Quenching - liquid N2 gas at 5 bar pressure
Tempering - 200C for 2 hours.

[thiago]

I have a 31.5mm plate, SA-517 Gr.70 with no heat treatment done at the plant, but it suffered PWHT by customer request. My question is: do I need to apply item UCS-85 (c) or item UCS-85 (f) I need to remove test specimens for simulating heat treatment?

Thank you.