For joint B-U7, if the groove is 20°, what is the bevel radius?

To determine the bevel radius for a joint with a 20° groove according to the AWS D1.1 Structural Welding Code, it is important to understand how the joint configuration affects the required preparation. The bevel radius refers to the curvature at the edge of a groove weld and is essential for ensuring proper weld penetration and integrity.

In cases of shallow bevel angles, such as the 20° specified here, the standard practice recommends using a smaller bevel radius to allow for proper welding conditions and to minimize stress concentrations at the edge of the joint. The AWS D1.1 provides guidelines for different bevel angles and their associated radius requirements as a means to facilitate effective welding processes and achieve strong joints.

In this scenario, a 1/4 inch bevel radius is aligned with the recommended practice for a 20° bevel angle. This smaller radius optimizes the welding access and provides a suitable transition between the base material and the weld metal, which contributes to the overall strength of the joint.

Understanding these nuances in bevel configurations and radius requirements is crucial for welders and engineers to ensure that joints meet both structural and safety standards as outlined in the AWS D1.1 code.