Answer :
Final answer:
The penetration requirement for a fillet weld does not typically correspond to a percentage of the base metal thickness, as it is based on other factors such as the leg lengths or throat of the weld.
Explanation:
The penetration requirement for a fillet weld typically refers to the depth to which the weld metal fuses with the base metals. In terms of percentage, the penetration should ideally melt and fuse enough to ensure the weld joint has the necessary strength. However, the exact penetration requirement can vary based on the specifics of the job, codes, or standards that are applicable. It is not commonly expressed in percentages of the base metal thickness because a fillet weld does not typically require full penetration. Instead, it is sized based on the leg lengths or throat of the weld. For many applications, the design of the weld will consider a certain amount of penetration into the base material, but not necessarily a specific percentage.
