One of the most commonly used materials for body jewelry, the ASTM F136 – Standard Specification for Wrought Titanium-6Aluminum-4Vanadium ELI (Extra Low Interstitial) Alloy for Surgical Implant Applications (UNS R56401) has been revised to F136-13 developed by Committee F04.12, ASTM BOS Volume13.01.
The new version changes are in section 9. Special Requirements
9.1 Microstructures shall be a result of processing within the alpha-beta field. Microstructures shall essentially consist of an equiaxed and/or elongated primary alpha in a transformed beta matrix with no continuous network of alpha at prior beta grain boundaries.
For your convenience, the abstract and scope from the ASTM site follows:
Abstract
This specification covers the chemical, mechanical, and metallurgical requirements for wrought annealed titanium-6aluminum-4vanadium ELI (extra low interstitial) alloy (R56401) to be used in the manufacture of surgical implants. The products are classified into: strip, sheet, plate, bar, forging bar, and wire. The heat analysis shall conform to the chemical composition requirements specified. Product analysis tolerances do not broaden the specified heat analysis requirements but cover variations between laboratories in the measurement of chemical content. Tension test and bend test shall be performed to meet the requirements specified.
This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
1. Scope
1.1 This specification covers the chemical, mechanical, and metallurgical requirements for wrought annealed titanium-6aluminum-4vanadium ELI (extra low interstitial) alloy (R56401) to be used in the manufacture of surgical implants.
Further information about the revision process that we just voted on.
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Hola cómo estás , te agradezco cada artículo y conocimientos que entregas , si envío a un laboratorio una pieza de titanio astm F 136 y solicito pruebas para la certificación astm f 2999-14 y ASTM F 2923-14 , quiere decir que esa joyería si es apta y cumple todas las normas de la app ?
Hola Sr Gutierrez,
The third party tests would let us know that the materials could be suitable for healed piercings, but would not be reliable for initial piercing jewelry.
For initial jewelry for a healing piercing we need reliable source material and strict melt control for guaranteed purity from original mill and their certification of tests, provided that they produce the material in one of the DFARS agreement countries.
Gracias siempre por Compartir :) !