AWS D1.1 2020 Figure 6.25

[Flaiano]

Good morning all,
regarding Figure 6.25 Fillet Weld Break and Macroetch Test Plate of the AWS D1.1 2020, does the value 5/16 in(leg fillet weld) mean a minimum?

Thank you very much for your reply
Have a nice weekend
Flaiano

 

[gtaw]

The size is the specified size. If the weld complies with table 8.1 and any other criteria included in clause 6, all is good.

Best regards - Al

 

[Flaiano]

I have done a filled weld with a leg bigger than this so isn't it acceptable? And then what mean the sentence (2) of the paragraph 6.23.2.2 _(2) Minimum leg size shall meet the specified fillet weld size_?
Thank you in advance
Flaiano

 

[gtaw]

D1.1 and many other welding standards are concerned with the strength of a connection. A smaller weld than what is specified may not transmit the load from one member to another. The weld is smaller, so it is weaker.

If the weld is larger than that specified, it is unlikely to fail. It is bigger, it is stronger.

In the case of welder performance qualification, one is trying to assess the welder's ability to deposit a sound weld, i.e., free of unacceptable discontinuities. You are also attempting to determine if the welder can deposit a fillet weld of a certain size. 1/4-inch and 5/16-inch fillet welds are very common in the structural steel industry, if the welder can deposit a single pass 5/16-inch fillet weld during the test, there is a good probability he can do the same in production.

If the welder deposits a much large weld than the 5/16-inch specified,it is a case of the welder not following direction. In production, making welds that are considerably large than that specified is a waste of time, money, and consequentially, represents profits lost.

Best regards - Al