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Re: [MW:14509] QW-403.6 OF ASME SEC. IX (MIN. THK. RANGE QUALIFICATION)

By Materials & Welding
Further to my previous reply, please refer trail interpretation.
 
I assume you can 10 mm x 5 mm impact specimen from 5 mm base metal and conduct test at MDMT only.
 

Interpretation:                       

Subject:            Section VIII, Division 1, UG-84 and Table UG-84.2

 

Question 3:      For materials of thickness less than 0.394 in., and when the width along the notch is at least 80% of the plate material being tested, is the test temperature reduced below the minimum design temperature by an amount indicated in Table UG-84.2?

 

Reply 3:           We would refer you to the first sentence of UG-84(c)(5)(b) which indicates that the Charpy tests of such a specimen shall be conducted at a temperature not warmer than the minimum design temperature.  Further, there is no requirement for reducing this temperature further.



On Wed, Jun 6, 2012 at 3:59 PM, CHINTUKUMAR GANDHI <cgandhi1975@yahoo.com> wrote:
Dear Experts,
 
What shall be the minm. qualified thk. range if PQR is qualified with 6 mm. Nom. thk. with Notch toughness properties. Will it be 3 mm. or 6 mm. as per QW-403.6 of ASME Sec. IX?
 
Further, suppose If I shall qualify this procedure on 5 mm. thk. PQR test coupon (machined from 6 mm. thk.), which thickness shall I have to consider for temperature reduction during subsize test specimen testing? Will it be 5 mm.(actual thk.) or 6 mm. (nom. thk.)?
 
Awaiting your experts' opinion at the earliest.
 
Thanks & regards,
 
 
C. R. GANDHI
 

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