Again before welding the cap I let the plate cool down till I could almost touch it. I held the sides for about a second before moving back to the other side.
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The cap was also done in a single pass just like the root and hot pass. I typically weld past the edge of most bevels. What that does is give good weld penetration, preventing face bend failure and undercut. It had almost no undercut and it was more than acceptable. The acceptance criteria for the face of the weld are as follows in the words of the AWS:. The second picture is the slag lifting itself off of the cap. What I like about flux cored arc welding is how easy the weld is to clean and in many times the slag just falls off by itself.
Welder Training & Testing Institute
The last picture is the cap cleaned with a wire brush. The test coupons were prepared just like my other welding certifications. First you mark a center-line on the plate. Then another line 1 inch above the center line and another line 1 inch below the center line. This is the section that can be used as an alternate coupon in the event of corner cracks with no evidence of slag inclusions.
Next is marking of the actual root and face bend specimens. Otherwise that test specimen will fail on the spot! After that they were marked by the welding instructor for a root and face bend followed by me cutting them on a band saw.
The backing bar removal was mostly done using a vice. First I put the coupon into the vice and took a grinder to the center of the backing bar gouging it. Next I locked onto one side if the split backing bar with the vice firmly. After that all I had to do was press down on it like a lever. I kept repeating this until all of the backing bars were removed on the test coupons. The pictures below are from the first welding certification that I failed. I am posting them because they give a good illustration of how to remove a backing bar.
After the backing bar is removed, the face and the root of the weld need to be ground flush to the base metal. If you grind past the base metal the test will be rejected for excessive material removal. After grinding down the root and face of the weld, I used a belt sander to round the square corners, followed by a buffing wheel to polish the weld area. The bend test went very well on these coupons. If you remember I took this test before and the test coupons failed before the weld area got a chance to bend all the way.
On this test I had two bends done, a root bend, and a face bend.go here
How to Pass the AWS D FCAW 3G (Vertical Up) Welding Certification
Below are pictures of the test specimens being bent. Both coupons were bent and I did not need the alternate. Maritime Agency Jobs! Welding Jobs from Indeed! Longevity Welder and Cutting Equipment Review! Jobs SimplyHired Welding Jobs!
See explanation below. AWS D1. Welding Process. FCAW Position.
- TEST COUPON SIZES.
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Vertical Vertical Progression. Butt Backing. Yes Backing Material. No Base Metal. Steel Thickness. E71T-1 Shielding Gas. Either Interpass Cleaning. Mechanical or Wire Brush Electrode Diameter. Checking the bevel on the test coupons to make sure they are Pre-Inspection of the Test Coupon The test coupon was put into the vertical position and marked with a white marker to make sure I do not move the plate anytime during welding or cleaning.
This is done because the AWS procedure notes state: After that the root of the weld was inspected because the welding procedure states: The Hot Pass Before welding the hot pass I did let the plate cool to the point that I could almost touch it. The acceptance criteria for the face of the weld are as follows in the words of the AWS: Gouging the center of the backing bar where the weld penetrated with a grinder. Grabbing and locking one side of the backing bar with a vice. Once the backing bar is secure grab it firmly.
Once you have a solid grip then press down until the backing bar starts to bend from the coupons. Once you press it all the way down it should break free.
Finally the backing bar is removed and you can see the two pieces that are left. The Welding Certification test coupons are now ready to bend. This is a face bend, root bend and alternative coupon that will be tested. The face and root coupons. The first coupon starting to bend. The coupon looks good as it is more then half way through the bend test. The root and face bend of the welding certification look flawless.
Another view from the top. Search for: Org , Proudly powered by WordPress. By goldybowen21 Date I've been asked to find the sizes and materials list for the test coupons going to be used for testing from 1" to 6" A where would I find the test coupon sizes I need to find them today also so any advice or direction would be helpful. By welderbrent Date Landon, The first place to start is by knowing the code involved because you will find the specs within the applicable code.
Hard for us to guide you without that foundational information. After you have that you will need to know the welding process involved. In some applications that can make a difference. Then, Fillet welds or Groove welds? Tacker, Welder, or Welding Operator? Just my two pennies worth from the information available. PQR ive got the thickness of the test coupons that would qualify both the groove and fillet using the A By Date By Funfax Date Hi, May be you can use A Gr. C instead A My company use the test coupon on Fillet Weld Size: Pipe 3" Sch. XX length 75 mm.