Mell What is a concave fillet weld?
[′kän‚kāv ′fil·ət ‚weld] (metallurgy) A fillet weld having a concave surface.
What makes a weld concave?
If a concave weld bead appears in the flat or horizontal position, it’s often the result of voltage that’s too high, wire feed speed that is too slow or travel speed that is too fast. Convex weld beads normally have poor fusion of the toes.
How do you size a concave fillet weld?
Fillet weld sizes are measured by the length of the legs of the largest right triangle that may be inscribed within the fillet weld cross section. Fillet weld sizes determine theoretical throat.
Why do we avoid concave shape fillet weld?
The weld face may be highly concave due to which the weld toe will have sharp notches. Due to the poor weld profile that results from these defects, the fatigue life of the fillet weld joint may be reduced owing to the greater toe angle.
Should fillet welds be concave?
The weld is triangular in shape and may have a concave, flat or convex surface depending on the welder’s technique. Welders use fillet welds when connecting flanges to pipes and welding cross sections of infrastructure, and when bolts are not strong enough and will wear off easily.
What is the thickness of a fillet welding?
AWS Dl.l (Structural Welding Code – Steel) specifies the minimum fillet weld size for each base metal thickness: e.g. 6-mm size for thickness over 12.7 up to 19.0 mm . AWS Dl.l also specifies the maximum convexity, because excessive convexity may cause stress concentration at the toes of the fillet weld, which may result in premature failure of the joint.
How are the dimensions for a fillet weld given?
Dimensions relating to the cross section of the weld are symbolized by b and are given on the left-hand side of the symbol. The cross-sectional dimension to be indicated for a fillet weld is the leg length.
What is the meaning of filet Weld?
Fillet weld. Fillet welding refers to the process of joining two pieces of metal together whether they be perpendicular or at an angle . These welds are commonly referred to as Tee joints which are two pieces of metal perpendicular to each other or Lap joints which are two pieces of metal that overlap and are welded at the edges.
What is convex weld?
Convex fillet welds are sometimes used in welding. Why? There are three types of fillet weld cross section profile, namely, flat, convex and concave. The convexity in convex fillet welds serve as reinforcement, which is believed to provide additional strength.