I am a CWI, and QA Supervisor, and I wanted to ask for some advice in regards to break testing. I normally have no issues reviewing a break test, but the question has been presented to me about slag line occurring in a break test. My question is, should there be any slag line visible in a break test, weather it be in the weld or along the root pass? I Can see a slag line, but it looks as if it is beyond the root pass, as if it were made due to a slight opening on the tacked side of the break test sample. Please advise.
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AWS Fillet Weld Break Test 3
- Thread starter mindbenda
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If the plates do not fit tight, there is a chance there will be a slag line at the root of the weld. If the slag line is beyond the root of the joint, all is good. If the slag line is in the root such that the corner of the 1/2 inch plate is visible as a square edge, no so good. The welder fails.
If I see the square edge of the plate, it means the fusion did not extend to the root. It is for that reason I do not use the edge of a rolled bar as the edge of the butting member. It is nearly impossible for most welders to avoid trapping slag in the radiused corner. The use of 1/2 x 8 inch wide bar stock cut to 4 inch lengths avoids the problem provided your saw can cut straight.
Best regards - Al
If I see the square edge of the plate, it means the fusion did not extend to the root. It is for that reason I do not use the edge of a rolled bar as the edge of the butting member. It is nearly impossible for most welders to avoid trapping slag in the radiused corner. The use of 1/2 x 8 inch wide bar stock cut to 4 inch lengths avoids the problem provided your saw can cut straight.
Best regards - Al
racookpe1978
Nuclear
I've evaluated several failures - and many more successes - in weld coupon bend tests. (Few, I readily admit) on plate tests.)
He (the welder) is testing himself against a standard to prove to you (and ME! Because I rely on your testing and evaluation judgment)) that he can weld properly.
I strongly recommend, that - if you have doubt about his result - don't question your doubts or try to "paper mache" a rule situation to let him pass. Require a new test.
He (the welder) is testing himself against a standard to prove to you (and ME! Because I rely on your testing and evaluation judgment)) that he can weld properly.
I strongly recommend, that - if you have doubt about his result - don't question your doubts or try to "paper mache" a rule situation to let him pass. Require a new test.
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It's not a coupon bend test, it's a T joint fillet-welded from one side, where the stem of the T is bent away from the weld root. You are likely to see something at the root, and that something is unlikely to be something wrong with the weld.
D1.1 clause 4.30.4.1 is very clear about the required test results. If it didn't manage to bend on itself, then you need to have complete fusion to the root and meet the restrictions for inclusions/porosity at the fracture surface. Something beyond the root is not part of the fracture surface.
Hg
Eng-Tips policies: faq731-376
D1.1 clause 4.30.4.1 is very clear about the required test results. If it didn't manage to bend on itself, then you need to have complete fusion to the root and meet the restrictions for inclusions/porosity at the fracture surface. Something beyond the root is not part of the fracture surface.
Hg
Eng-Tips policies: faq731-376
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