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This specification covers the requirements for unfinished cobalt-28chromium-6molybdenum (UNS R30075) investment product alloy castings for surgical implant applications, and casting alloys of the same in the form of shot, bar, or ingots to be used in the manufacture of surgical implants. This specification does not apply to completed surgical implants made from castings. Both product castings and casting alloys shall conform to specified chemical composition and mechanical requirements including ultimate tensile strength, yield strength, elongation, and reduction of area. Product castings shall additional undergo liquid penetrant, radiographic, metallographic, and hardness examination.
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.
1.1 This specification covers the chemical, mechanical, and metallurgical requirements for cobalt-28 chromium-6 molybdenum alloy unfinished investment product castings for surgical implant applications and casting alloy in the form of shot, bar, or ingots to be used in the manufacture of surgical implants. This specification does not apply to completed surgical implants made from castings.
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
A957 Specification for Investment Castings, Steel and Alloy, Common Requirements, for General Industrial Use
E3 Guide for Preparation of Metallographic Specimens
E8/E8M Test Methods for Tension Testing of Metallic Materials
E18 Test Methods for Rockwell Hardness of Metallic Materials
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E165 Practice for Liquid Penetrant Examination for General Industry
E354 Test Methods for Chemical Analysis of High-Temperature, Electrical, Magnetic, and Other Similar Iron, Nickel, and Cobalt Alloys
E407 Practice for Microetching Metals and Alloys
E601 Test Method for Measuring Electromotive Force (emf) Stability of Base-Metal Thermoelement Materials with Time in Air
F629 Practice for Radiography of Cast Metallic Surgical Implants
F981 Practice for Assessment of Compatibility of Biomaterials for Surgical Implants with Respect to Effect of Materials on Muscle and Bone
Aerospace Material SpecificationAMS2269 Chemical Check Analysis Limits: Nickel, Nickel Alloys and Cobalt Alloys
ICS Number Code 11.040.40 (Implants for surgery, prothetics and orthotics)
UNSPSC Code 42295500(Surgical implants and expanders and extenders and surgical wires and related products)