UNI 6786-1971 Forged special alloyed steel hardened and tempered axles with high characteristics of fatigue for wheel sets of railway vehicles and traction units. Quality, requirements and tests.
It concerns the standards relating to the quality of the steel of the rough or semi-finished or finished forged axles of special alloy steel, in the hardened and tempered state, intended for wheelsets of railway rolling stock and for which a particularly high fatigue limit is required, to their process manufacturing and the checks and tests to be carried out for their acceptance. For applications for which high toughness characteristics are also required, see UNI 6787-71. Tests and results (visual, microscopic, macrographic examination; tensile, longitudinal and transversal resilience, impact, rotary bending fatigue tests; chemical analysis). Appendix a: Ultrasound exams. Appendix b: metalloscope examination. Source: unifer-unsider 005.
UNI 6786-1971 history
1971UNI 6786-1971 Forged special alloyed steel hardened and tempered axles with high characteristics of fatigue for wheel sets of railway vehicles and traction units. Quality, requirements and tests.