CVN Test Temperature Reduction AWS D1.1

[nguyen anh tuan]

Dear Experts

 

I have question about using sub-sized specimen for CVN test

Testing temperature following specification   is -20^oc ,Plate thickness is 8mm and specimen sized is 10x5

My question How much temperature will apply for testing (AWS D1.1)

 

“4.36.7 When sub-sized specimens are required, and the

width of the specimen across the notch is less than 80%

of the base metal thickness, the test temperature shall be

reduced in conformance with Table 4.15, unless otherwise

specified in the contract documents

Thanks in advance

 

 

Tuan

[Harish Kannepalli]

-20-11.1=-31.1C

2013/8/17 nguyen anh tuan <tuan...@gmail.com>

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regards,

Harish.

[Duc]

Dear

 

The temp is -31.1^OC

 

Thanks & Regards

Hoang Van Duc

QC site

Gorgon Heavy Lift and Tie In project

(+84)0943266655

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[sathishkumar R]

Dear all.! Good day.!

   For the above case the test temperature would be :  -20-11.1= -31.1 deg C 

  My query is base metal thickness to be considered in temperature reduction ( code reference please )

 

  For example, if the material thickness is 7mm and specimen is 10X4mm, MDMT -20 deg C , the test temp would be..?  (-36.8 or -32.3 deg C - code reference please )

Note: ASME sec VIII Div 1,  it is clearly mentioned that the base metal thickness to be considered , Para UG 84 (c) 5 (b)

[mohd]

Dear ,

Where it is mentioned Base metal thick to be considered??

Example:

your thickness is 8mm means width across the notch is less than 80% so you prefer to have subsized 5mm

New sub sized is ==10x5x55

Required sized is ==10x10x55

now temperature reduction is == -20-11.1== -31.1C and

Charpy energy if Original was 27J then new one as per A370 table-9 is 14J.

Hope this will clear.!!