[MW:18787] Re: CVN Test Temperature Reduction AWS D1.1

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.!!

On Saturday, August 17, 2013 11:35:48 AM UTC+3, nguyen tuan wrote:

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

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