Visible cracks, a hardness record and production photographs provide different kinds of evidence. A single hardness number cannot replace the combined investigation.
What the cracked parts establish
The supplied photographs show cracks in some screw heads after cold heading. Their location and appearance help define the abnormality. They do not identify whether its origin lies in the material, surface condition, part geometry, deformation sequence or another process condition.
What the hardness record establishes
The supplied records include a hardness-testing equipment photograph and a software display reading approximately 185 HV0.2. The display is evidence of a recorded Vickers hardness result under the indicated test designation. It does not provide an acceptance threshold for an unidentified grade or prove the cause of the cracks.
A result that appears acceptable must still be interpreted with the grade, delivery condition, test location, applicable method and order requirements. The records shown here do not establish the link between every photographed part, test point and material batch. No hardness conversion or root-cause verdict is inferred.
The production process remains part of the evidence
The customer ultimately needs conforming parts from the actual machine and process. The same measured hardness does not establish the same response in another product geometry or at another deformation location. Material condition, part design and forming conditions must be evaluated together.
A useful next step
Bring the abnormal parts, inspection records, material specification and actual use conditions into one traceable comparison. Confirm the material and test references, identify the defective location and forming stage, and compare the relevant process conditions before assigning responsibility.
Creation Group considers material test results together with application performance. Photographs, material dimensions and a description of the abnormality can help define the next investigation step.
Scope of the original records
The original site materials supplied for this article are preserved. Crack photographs illustrate appearance; testing photographs show that hardness records exist; machine photographs illustrate the forming setting. They do not independently establish crack origin, batch correspondence or an effective corrective action. No process setting, acceptance threshold or adjustment method is disclosed or invented.