# GNitro
The GNitro Utility is both a prediction and process design tool. GNitro can be used to predict the Nitrogen, White Layer Nitride, and Alloy Nitride profile for each step. Although the tool cannot be used for 3D geometry, it can predict both flat and curved surfaces by defining the radius for either an inner or outer radius. The GNitro tool, similar to both GCarb and VCarb, can also be used for process design. The process design feature allows the user to input specific parameters such as case depth and hardness so that the tool can help design a nitriding schedule. ## GNitro The GNitro utility can be used as a prediction and a process design tool. In order to use either analysis type, first, a material must be selected. In this case, the U41XX material was selected. ![](https://3062023715-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F0UQEr9tolIKQwZXdPc9a%2Fuploads%2Fgit-blob-b5e403c639d16d75e46d669fb56fec966977ebf4%2FGNitro_Material.png?alt=media) Next, go to the Geometry tab to define the outer or inner radius diameter. For this process design analysis, an outer radius of 50 mm and a model thickness of 2 mm will be used. ![](https://3062023715-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F0UQEr9tolIKQwZXdPc9a%2Fuploads%2Fgit-blob-3c43f1562382cf6901377755cded3b8c9b805569%2FGNitro_Geom.png?alt=media) After the geometry has been defined, go to the process tab to define the nitriding time, temperature and nitrogen potential. Since this is a process design analysis, there are 3 other parameters that need to be defined including the Furnace Round Up time (s), Effective Case Depth (ECD)(mm), and Nitrogen (%) at ECD. These values, along with the nitriding schedule, will control the step time to be solved for in the third step labeled "TBD". ![](https://3062023715-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F0UQEr9tolIKQwZXdPc9a%2Fuploads%2Fgit-blob-b773f02611cc486e9fa80919e0eab6ad1af66730%2FGNitro_Process.png?alt=media) Based on the design parameters, in order to reach an effective case depth of 0.25 mm at 0.30% nitrogen, a step time of 33000 seconds, or 9.167 hours is required. ![](https://3062023715-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F0UQEr9tolIKQwZXdPc9a%2Fuploads%2Fgit-blob-852a4543ab34c5e1854073d847dad503a6551d60%2FGNitro_Results.png?alt=media) ![](https://3062023715-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F0UQEr9tolIKQwZXdPc9a%2Fuploads%2Fgit-blob-7ed9ada3ccc69653f46211449855af249a8661bf%2FGNitro_Process_Design_Plot.png?alt=media)