Rough grinding is considered complete when the excess weld material is reduced to what thickness?

Rough grinding in thermite welding is an essential step to ensure that the welded joint has a smooth and even surface. The process aims to remove excess weld material that may have been generated during the welding process. The goal is to achieve a specific thickness that ensures the integrity and quality of the weld without compromising its strength.

A thickness of 0.030 thousandths of an inch is generally recognized as the standard for completing rough grinding. At this thickness, the weld material has been sufficiently smoothed out, allowing for further finishing processes if necessary, while still maintaining an appropriate profile of the weld joint. This thickness provides a balance between removing excess material and ensuring that the weld is not ground down excessively, which could weaken the joint.

In contrast, the other thickness options do not align with the standard practices for rough grinding in thermite welding, as they either do not meet the adequate threshold for ensuring weld integrity or are not commonly referenced in welding specifications.