Standard Specification for Cobalt-28 Chromium-6 Molybdenum Alloy Castings and Casting Alloy for Surgical Implants (UNS R30075)

ABSTRACT
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.
SCOPE
1.1 This specification covers the 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 inch-pound units are to be regarded as the standard. The SI equivalents in parentheses are for information only.

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ASTM F75-07 - Standard Specification for Cobalt-28 Chromium-6 Molybdenum Alloy Castings and Casting Alloy for Surgical Implants (UNS R30075)
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: F75 – 07
Standard Specification for
Cobalt-28 Chromium-6 Molybdenum Alloy Castings and
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Casting Alloy for Surgical Implants (UNS R30075)
This standard is issued under the fixed designation F75; the number immediately following the designation indicates the year of original
adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* rials for Surgical Implants with Respect to Effect of
Materials on Muscle and Bone
1.1 This specification covers the requirements for cobalt-28
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2.2 Aerospace Material Specification:
chromium-6 molybdenum alloy unfinished investment product
AMS2248 ChemicalCheckAnalysisLimits:Corrosionand
castings for surgical implant applications and casting alloy in
Heat Resistant Steels and Alloys, Maraging and Other
the form of shot, bar, or ingots to be used in the manufacture
Highly-Alloyed Steels, and Iron Alloys
of surgical implants. This specification does not apply to
AMS 2269 Chemical Check Analysis Limits: Nickel,
completed surgical implants made from castings.
Nickel Alloys and Cobalt Alloys
1.2 The values stated in inch-pound units are to be regarded
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2.3 ISO Standards:
as the standard. The SI equivalents in parentheses are for
ISO 5832-4 Implants for Surgery—Metallic Materials—
information only.
Part 4: Cobalt-Chromium-Molybdenum Casting Alloy
2. Referenced Documents ISO 6892 Metallic Materials Tensile Testing at Ambient
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Temperature
2.1 ASTM Standards:
ISO 9001 Quality Management Systems—Requirements
A957 Specification for Investment Castings, Steel and Al-
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2.4 American Society for Quality Standard:
loy, Common Requirements, for General Industrial Use
ASQ Cl Specification of General Requirements for a Qual-
E3 Guide for Preparation of Metallographic Specimens
ity Program
E8 Test Methods for Tension Testing of Metallic Materials
E18 Test Methods for Rockwell Hardness of Metallic Ma-
3. Terminology
terials
3.1 Definitions of Terms Specific to This Standard:
E29 Practice for Using Significant Digits in Test Data to
3.1.1 investment casting, n—a metal casting that is pro-
Determine Conformance with Specifications
duced in a mold obtained by investing (surrounding) an
E165 PracticeforLiquidPenetrantExaminationforGeneral
expendable pattern with a ceramic slurry that is allowed to
Industry
solidify.The expendable pattern may consist of wax, plastic, or
E354 Test Methods for Chemical Analysis of High-
other material and is removed prior to filling the mold with
Temperature, Electrical, Magnetic, and Other Similar Iron,
liquid metal.
Nickel, and Cobalt Alloys
3.1.2 master heat, n—a quantity of metal processed in a
E407 Practice for Microetching Metals and Alloys
single furnace or refining vessel at one time in such a manner
E601 Test Method for Measuring Electromotive Force
as to produce the desired composition and properties.
(emf) Stability of Base-Metal Thermoelement Materials
3.1.3 sub-heat, n—a portion of a master heat remelted
with Time in Air
without additional processing for pouring into castings. Syn-
F629 Practice for Radiography of Cast Metallic Surgical
onyms: melt, production heat.
Implants
F981 Practice forAssessment of Compatibility of Biomate-
NOTE 1—Terminology section in accordance with Specification A957.
4. Ordering Information
1 4.1 Inquiries and orders for material under this specification
This specification is under the jurisdiction of ASTM Committee F04 on
Medical and Surgical Materials and Devices and is the direct responsibility of shall include the following information:
Subcommittee F04.12 on Metallurgical Materials.
Current edition approved Jan. 1, 2007. Published January 2007. Originally
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approved in 1967. Last previous edition approved in 2001 as F75 – 01. DOI: Available from Society of Automotive Engineers (SAE), 400 Commonwealth
10.1520/F0075-07. Dr., Warrendale, PA 15096-0001, http://www.sae.org.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM 4th Floor, New York, NY 10036, http://www.ansi.org.
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Standards volume information, refer to the standard’s Document Summary page on Available from American Society for Quality (ASQ), 600 N. Plankinton Ave.,
the ASTM website. Milwaukee, WI 53203, http://www.asq.org.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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F75–07
4.1.1 Quantity (number of product castings or weight of residual elements.Analysis is not required for
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