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Steel will never fatigue if stressed to less than 40% of its Ultimate Tensile Strength; aluminium fatigues at any stress level, provided the stress be cyclic. Aluminium rims depend on the rims being discarded for other reasons before they crack up. For more information, check MIL-HDBK-5 "Metallic Materials and Elements for Aerospace Vehicle Structures" ...


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Firstly, what is your ultimate goal?: To minimize the environmental cost entailed by creating a steel-framed bike To minimize the environmental cost entailed by 100+ years of creating and using a steel-framed bike or bikes To maximize the lifespan of a steel-frame bike To minimize the environmental cost entailed by creating a bike irrespective of frame ...



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