Hi
First of all checked consumable impact testing values.
Impact test value 10 % variation lab to lab testing.
Then make test coupon.
Offer to impact test first check impact test machine is calibrated.then checked imapct test.
Consumbale slection important to impact tested job.
With regards
Jatin Patel
On 27 Aug 2014 08:09, "'CHINTUKUMAR GANDHI' via Materials & Welding" <materials-welding@googlegroups.com> wrote:
-- --Dear Experts,Greetings of the day.I came to an issue in WPQR of P No. 1 Group 2 Base metal in CVN Impact testing of weld and haz. Design Code is ASME Sec. VIII Div. 1 Ed. 2013 & ASME Sec. IX Ed. 2013.Base Metal Thk. 25 mm. SA 516 Gr. 70PWHT: Normalizing at 920+/-10º C.Holding Period 65 Minutes.Welding Process SMAW (Manual)Electrode Used: 3.15 & 4.0 mm. E7018-1 (Impact tested in as welded condition).Position: 3 G Uphill (Stringer/ Weave Bead)CVN Impact test results of HAZ:Test Temp. -57º C (Temp. reduction applicable)Specimen size: 10 x 5 x 55 mm.Values in Joules HAZ Top Side- 5, 19.5, 4 (Average 9.50)Values in Joules HAZ Bottom Side- 4.5, 4, 17.5 (Average 8.67)Values reqd. for sub size specimen: Individual min. 8 J & Min. Average 10 J.CVN Impact test results of Weld:Test Temp. -46º C (Temp. reduction applicable)Specimen size: 10 x 10 x 55 mm.Values in Joules - 9, 14.5, 8.5 (Average 10.67)Values reqd. for Std. size specimen: Individual min. 16 J & Min. Average 20 J.
What shall be the reason of failure? Is electrode selection OK?
Awaiting for your prompt favorable response at the earliest.Thanks & regards,C. R. GANDHI
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