What is convexity in welding?

The maximum distance from the face of a convex fillet weld perpendicular to a line joining the weld toes.

What is excessive reinforcement in welding?

Excess Reinforcement Or Penetration For fillets – is excess weld metal above the specified fillet size including throat thickness. Excess reinforcement/penetration can be caused by excessive current, too slow travel speeds and incorrect joint fit-up.

What is a convex weld profile?

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. Excess convexity leads to an increase in stress in weld toes which may subsequently fails by cracking.

What is the meaning of convexity?

: the quality or state of being curved outward : the quality or state of being convex. : a shape that is curved outward : a convex shape. See the full definition for convexity in the English Language Learners Dictionary.

What is the convexity of weld reinforcement in groove weld?

Convexity represents the difference between the effective and actual throat of a convex fillet weld. In a correctly designed structure, fillet welds are intended to only transmit loads in shear, where the shear stress is transmitted through the weld throat.

What is the reason that excessive convexity is considered a serious weld fault?

Excessive convexity can produce a notch effect in the welded area and, consequently, concentration of stress under load. For this reason, some codes and standards specify the maximum permissible convexity of a weld profile. Insufficient current or incorrect welding techniques typically cause this condition.

Which factor is affect dimensional defect in welding?

As per the American Society of Mechanical Engineers (ASME), causes for welding defects are as follows: 45 percent poor process conditions, 32 percent operator error, 12 percent wrong technique, 10 percent incorrect consumables, and 5 percent bad weld grooves. Intergranular stress corrosion .

What is 6mm fillet weld?

Fillet welds are defined by the size of the leg length e.g. a 6 mm CFW is a continuous fillet weld having a leg length of 6 mm.

What is concavity in welding?

The maximum distance from the face of a concave fillet weld perpendicular to a line joining the weld toes.

Is high convexity good or bad?

The higher the convexity, the more dramatic the change in price given a move in interest rates. Whatever you call it, after a while, if you keep braking a car it stops. After a while, if your bond is experiencing negative convexity, it also slows down/loses value.

What is convex weld?

The weld is aesthetically 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, welding cross sections of infrastructure, and when fastening metal by bolts isn’t strong enough and wear off easily.

How to measure a fillet weld?

Weld Features to Measure. I do need to emphasize that this article will deal with fillet welds measured by ” Leg Length ” which is the standard dimensional feature specified

What is a flux core welder?

Flux core welding is a wire feed welding process which is known for its speed and ease of operation. The acronym for this welding process is FCAW – Flux Core Arc Welding .