Hardness testing is a non-destructive process using a Rockwell Scale to identify indentation hardness of a material. Indentation hardness relates to tensile strength. The scale identifies the hardness by measuring the depth of penetration of the indent object under massive load, and then comparing it to the penetration made by the preload.
Magnetic testing is a non-destructive process used for detecting surface and subsurface anomalies in ferromagnetic materials such as iron, cobalt, and similar alloys. The process imbues the materials with a magnetic field with indirect or direct magnetism. Direct magnetization begins when an electrically charged current flows through an object and a magnetic field is invoked within the object. Indirect magnetization begins when no electrically charged current is flowing through the object, but instead the magnetic field is invoked from an outside source. The magnetic lines of force are perpendicular to the direction of the electric current using a Gould‑Bass Magne‑Tech Model 3505, horizontal three phase FWDC, Type II per MIL‑M‑6867, 54" maximum length capacity, 12" ID 5‑turn coil, infinite electronic amperage adjustments with 6000 Amps maximum circular magnetization and 3800 Amps maximum longitudinal magnetization capability.
Nital etch testing is a non-destructive process to identify if heat has been inducted into a temper steel component before the final heating treatment. Final heat treatment is done by means such as machinery, pressing, grinding and other processes which will extensively alter the properties of the final product. Using processes such as grinding generates extreme levels of heat due to friction, which may alter the heated area on an atomic level. If the metallurgical structure changed, that area will be evidenced by light gray to white areas surrounded by a light brown to black border or evidenced by light brown to black indications darker than surrounding areas than the surrounding after etching. The following solution is used for the detection nitric acid 3 to 5 percent in water and HCL acid 4 to 6 percent in water.
Penetrant is a non-destructive process used to identify surface cracking or breaking in all non-porous materials. This process is only applied toward non-ferrous and ferrous materials; however, most ferrous materials undergo magnetic particle inspection instead. This process is used to also detect forging, casting, and welding defects that may cause leaks fractures. We use the following penetrant systems: Type I, Method A, Sensitivity Level 2, Type I, Method A, Sensitivity Level 3 and Type I, Method A, Sensitivity Level 4.
