| Descriptors | Air transport engineering, Steels, Wrought steels, Nitriding steels, Case-hardening steels, Springs, Austenitic steels, Unalloyed steels, Forgings, Forging stock, Billets, Bars (materials), Wires, Bolts, Nuts, Inspection, Approval testing, Acceptance (approval), Specimen preparation, Test specimens, Marking, Sampling methods, Dimensions, Precipitation hardening, Decarburization, Heat treatment, Non-metallic inclusions, Surface defects, Macrographic examination, Mechanical testing, Tensile testing, Torsion testing, Hardness testing, Ultrasonic testing, Visual inspection (testing), Certification (approval), Quality assurance, Classification systems |
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