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ASTM F799-99

(Specification)

Standard Specification for Cobalt-28 Chromium-6 Molybdenum Alloy Forgings for Surgical Implants (UNS R31537, R31538, R31539)

Standard Specification for Cobalt-28 Chromium-6 Molybdenum Alloy Forgings for Surgical Implants (UNS R31537, R31538, R31539)

SCOPE
1.1 This specification covers the material requirements of cobalt-28chromium-6molybdenum alloy high-strength forgings for the manufacture of surgical implants. Material conforming to this specification has been evaluated for biocompatibility and corrosion resistance and has been found to be comparable to material conforming to Specification F 75. The properties specified in this document specifically apply to finished or semifinished parts that receive no subsequent metallurgical processing.  
1.2 The values stated in inch-pound units are to be regarded as the standard. The metric equivalents of the inch-pound units may be approximate.  
1.3 Wrought material to be used as forging stock in the manufacture of forgings conforming to this specification, typically hot worked and unannealed with a surface finish suitable for forging, shall be fabricated and supplied in accordance with F 1537.

General Information

Status
Historical
Publication Date
09-Jun-1999
ICS
11.040.40 - Implants for surgery, prosthetics and orthotics
Technical Committee
F04 - Medical and Surgical Materials and Devices
Drafting Committee
F04.12 - Metallurgical Materials
Current Stage
Ref Project

Relations

Replaced By
ASTM F799-02 - Standard Specification for Cobalt-28 Chromium-6 Molybdenum Alloy Forgings for Surgical Implants (UNS R31537, R31538, R31539)
Effective Date
10-Apr-2002
Referred By
ASTM F1357-23 - Standard Specification for Articulating Total Wrist Implants
Effective Date
10-Jun-1999
Referred By
ASTM F1714-96(2018) - Standard Guide for Gravimetric Wear Assessment of Prosthetic Hip Designs in Simulator Devices
Effective Date
10-Jun-1999
Referred By
ASTM F2068-15 - Standard Specification for Femoral Prostheses—Metallic Implants (Withdrawn 2023)
Effective Date
10-Jun-1999
Referred By
ASTM F1378-18e1 - Standard Specification for Shoulder Prostheses
Effective Date
10-Jun-1999
Referred By
ASTM F732-17 - Standard Test Method for Wear Testing of Polymeric Materials Used in Total Joint Prostheses
Effective Date
10-Jun-1999
Referred By
ASTM F1537-20 - Standard Specification for Wrought Cobalt-28Chromium-6Molybdenum Alloys for Surgical Implants (UNS R31537, UNS R31538, and UNS R31539)
Effective Date
10-Jun-1999
Referred By
ASTM F2887-23 - Standard Specification for Total Elbow Prostheses
Effective Date
10-Jun-1999
Referred By
ASTM F1672-14(2019) - Standard Specification for Resurfacing Patellar Prosthesis (Withdrawn 2023)
Effective Date
10-Jun-1999
Referred By
ASTM F2083-21 - Standard Specification for Knee Replacement Prosthesis (Withdrawn 2023)
Effective Date
10-Jun-1999
Referred By
ASTM F2091-15 - Standard Specification for Acetabular Prostheses (Withdrawn 2023)
Effective Date
10-Jun-1999
Referred By
ASTM F3047M-23 - Standard Guide for High Demand Hip Simulator Wear Testing of Hard-on-Hard Articulations
Effective Date
10-Jun-1999
Referred By
ASTM F543-23 - Standard Specification and Test Methods for Metallic Medical Bone Screws
Effective Date
10-Jun-1999
Referred By
ASTM F2665-21 - Standard Specification for Total Ankle Replacement Prosthesis
Effective Date
10-Jun-1999
Referred By
ASTM F3018-17 - Standard Guide for Assessment of Hard-on-Hard Articulation Total Hip Replacement and Hip Resurfacing Arthroplasty Devices
Effective Date
10-Jun-1999

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ASTM F799-99 - Standard Specification for Cobalt-28 Chromium-6 Molybdenum Alloy Forgings for Surgical Implants (UNS R31537, R31538, R31539)ASTM F799-99 - Standard Specification for Cobalt-28 Chromium-6 Molybdenum Alloy Forgings for Surgical Implants (UNS R31537, R31538, R31539)
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Technical specification
ASTM F799-99 - Standard Specification for Cobalt-28 Chromium-6 Molybdenum Alloy Forgings for Surgical Implants (UNS R31537, R31538, R31539)
English language
3 pages
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Standards Content (Sample)


NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: F 799 – 99
Standard Specification for
Cobalt-28Chromium-6Molybdenum Alloy Forgings for
Surgical Implants (UNS R31537, R31538, R31539)
This standard is issued under the fixed designation F 799; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope F 981 Practice for Assessment of Compatibility of Bioma-
terials (Non-porous) for Surgical Implants with Respect to
1.1 This specification covers requirements of cobalt-
Effect of Materials on Muscle and Bone
28chromium-6molybdenum alloy (UNS R31537, R31538,
F 1537 Specification for Wrought Cobalt-28 Chromium-6
R31539) high-strength forgings for the manufacture of surgical
Molybdenum Alloy for Surgical Implants
implants. Material conforming to this specification has been
2.2 American Society for Quality Standard:
evaluated for biocompatibility and corrosion resistance and
ASQ C1 Specification of General Requirements for a Qual-
has been found to be comparable to material conforming to
ity Program
Specification F 75. The properties specified in this document
specifically apply to finished or semifinished parts that receive
3. Significance and Use
no subsequent metallurgical processing.
3.1 The purpose of this specification is to characterize the
1.2 The values stated in inch-pound units are to be regarded
properties of currently available cobalt-28chromium-
as the standard. The metric equivalents of the inch-pound units
6molybdenum forgings.
may be approximate.
1.3 Wrought material to be used as forging stock in the
4. Ordering Information
manufacture of forgings conforming to this specification,
4.1 Inquiries and orders for material under this specification
typically hot worked and unannealed with a surface finish
shall include the following information:
suitable for forging, shall be fabricated and supplied in
4.1.1 Quantity,
accordance with F 1537.
4.1.2 ASTM designation and date of issue,
4.1.3 Mechanical properties,
2. Referenced Documents
4.1.4 Form (semifinished parts, part No.),
2.1 ASTM Standards:
3 4.1.5 Applicable dimensions or print number,
E 8 Test Methods for Tension Testing of Metallic Materials
4.1.6 Condition (forged, heat treated, annealed),
E 18 Test Methods for Rockwell Hardness and Rockwell
3 4.1.7 Special tests, and
Superficial Hardness of Metallic Materials
4.1.8 Other requirements.
E 112 Test Methods for Determining the Average Grain
Size
5. Condition
E 165 Test Method for Liquid Penetrant Examination
5.1 The material shall be forged by hammering, pressing,
E 930 Test Methods for Estimating the Largest Grain Ob-
3 rolling, extruding, or upsetting, and shall be processed, if
served in a Metallographic Section (ALA Grain Size)
practicable, so as to cause metal flow during the hot-working
F 75 Specification for Cast Cobalt-Chromium-Molybdenum
5 operation in the direction most favorable for resisting stresses
Alloy for Surgical Implant Applications
encountered in service, as may be indicated by the implant
F 601 Practice for Fluorescent Penetrant Inspection of Me-
5 manufacturer.
tallic Surgical Implants
5.2 Forgings shall be free of splits, scale, cracks, flaws, and
other imperfections not consistent with good commercial
practice.
This specification is under the jurisdiction of ASTM Committee F-4 on Medical
5.3 Optional indentification marks, including the manufac-
and Surgical Materials and Devicesand is the direct responsibility of Subcommittee
F04.12 on Metallurgical Materials. turer’s logo, material designation, heat code number, and
Current edition approved June 10, 1999. Published September 1999. Originally
impression number, may be placed upon each forging, the
published as F 799 – 82. Last previous edition F 799 – 96.
Supporting data are available from ASTM Headquarters, 100 Barr Harbor Dr.,
West Conshohocken, PA 19428.
Annual Book of ASTM Standards, Vol 03.01.
4 6
Annual Book of ASTM Standards, Vol 03.03. Available from American Society for Quality, 161 W. Wisconsin Ave.,
Annual Book of ASTM Standards, Vol 13.01. Milwaukee, WI 53203.
Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
F 799
method and location of which shall be as specified by the or small size. In lieu of mechanical testing, these parts shall
purchaser. exhibit hardness of HRC 35 to 45 when tested in accordance
with Test Methods E 18.
6. Chemical Compostion
7.2 Hardness—Finished or semifinished parts conforming
6.1 The chemical composition of forgings shall meet the
to this specification shall have a minimum Rockwell C
chemical requirements of F 1537
hardness of 35 HRC. The hardness determination shall be
performed in accordance with Test Methods E 18.
7. Mechanical Requirements
8. Special Tests
7.1 Tensile Properties:
7.1.1 Tensile properties shall be determined in accordance
8.1 The grain size of forgings shall be five or finer when
with Test Methods E 8.
tested in accordance with Test Methods E 112. In forgings it
7.1.2 The mechanical properties of test specimens prepared
may not be possible to fully recrystallize the entire microstruc-
from finished or semifinished parts shall conform to the
ture to a fine grain size. Duplex microstructures exhibiting
requirements in Table 1.
areas of unrecrystallized grains as large as ASTM No. 2 (or
7.1.3 Tension specimens shall be produced from finished or
ALA No. 2, as applicable, see E 930) shall be acceptab
...

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