ASTM F75-98

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

SCOPE
1.1 This specification provides 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 of inch-pound units may be approximate.

General Information

• Status: Historical
• Publication Date: 09-Dec-2001
• 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

Relations

• Replaced By: ASTM F75-01 - Standard Specification for Cobalt-28 Chromium-6 Molybdenum Alloy Castings and Casting Alloy for Surgical Implants (UNS R30075)
• Effective Date: 10-Dec-2001
• Referred By: ASTM F2091-15 - Standard Specification for Acetabular Prostheses (Withdrawn 2023)
• Effective Date: 10-Dec-2001
• Referred By: ASTM F384-17 - Standard Specifications and Test Methods for Metallic Angled Orthopedic Fracture Fixation Devices
• Effective Date: 10-Dec-2001
• Referred By: ASTM F2083-21 - Standard Specification for Knee Replacement Prosthesis (Withdrawn 2023)
• Effective Date: 10-Dec-2001
• Referred By: ASTM F2068-15 - Standard Specification for Femoral Prostheses—Metallic Implants (Withdrawn 2023)
• Effective Date: 10-Dec-2001
• Referred By: ASTM F2887-23 - Standard Specification for Total Elbow Prostheses
• Effective Date: 10-Dec-2001
• Referred By: ASTM F732-17 - Standard Test Method for Wear Testing of Polymeric Materials Used in Total Joint Prostheses
• Effective Date: 10-Dec-2001
• 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-Dec-2001
• Referred By: ASTM F1377-21 - Standard Specification for Cobalt-28Chromium-6Molybdenum Powder for Medical Devices (UNS R30075, UNS R31537, and UNS R31538)
• Effective Date: 10-Dec-2001
• Referred By: ASTM F1378-18e1 - Standard Specification for Shoulder Prostheses
• Effective Date: 10-Dec-2001
• Referred By: ASTM F1408-20a - Standard Practice for Subcutaneous Screening Test for Implant Materials
• Effective Date: 10-Dec-2001
• Referred By: ASTM F1672-14(2019) - Standard Specification for Resurfacing Patellar Prosthesis (Withdrawn 2023)
• Effective Date: 10-Dec-2001
• Referred By: ASTM F564-17 - Standard Specification and Test Methods for Metallic Bone Staples
• Effective Date: 10-Dec-2001
• Referred By: ASTM F2886-17(2023) - Standard Specification for Metal Injection Molded Cobalt-28Chromium-6Molybdenum Components for Surgical Implant Applications
• Effective Date: 10-Dec-2001
• Referred By: ASTM F981-23 - Standard Practice for Assessment of Muscle and Bone Tissue Responses to Long-Term Implantable Materials Used in Medical Devices
• Effective Date: 10-Dec-2001

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 75 – 98
Standard Specification for
Cobalt-28 Chromium-6 Molybdenum Casting Alloy and Cast
Products for Surgical Implants (UNS R30075)
This standard is issued under the fixed designation F 75; 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 ASQ Cl General Requirements for a Quality Program
1.1 This specification covers the requirements for cobalt-28
3. Significance and Use
chromium-6 molybdenum casting alloy in, shot, bar, or ingot
3.1 This specification characterizes the composition and
form for surgical implant applications.
properties in the starting material (for example, remelt alloy),
1.2 This specification also describes the chemical analysis
used to investment cast cobalt-28 chromium-6 molybdenum
requirements for investment castings produced from the alloy
alloy surgical implants.
described in this specification. This specification is not con-
cerned with any other specific requirements or recommenda-
4. Ordering Information
tions for investment castings.
4.1 Inquiries and orders for material under this specification
1.3 Requirements for powder produced from the alloy
shall include the following information:
described in this specification are provided in Specification
4.1.1 Quantity (weight),
F 1377.
4.1.2 ASTM designation,
1.4 The values stated in inch-pound units are to be regarded
4.1.3 Mechanical properties (if applicable),
as the standard.
4.1.4 Form (shot, bar, ingot),
4.1.5 Applicable dimensions or print number,
2. Referenced Documents
4.1.6 Condition,
2.1 ASTM Standards:
2 4.1.7 Special tests, and
E 8 Test Methods of Tension Testing of Metallic Materials
4.1.8 Other requirements.
E 18 Test Methods for Rockwell Hardness and Rockwell
Superficial Hardness of Metallic Materials
5. Chemical Requirements
E 354 Test Methods for Chemical Analysis of High-
5.1 The heat analysis shall conform to the requirements as
Temperature, Electrical, Magnetic, and Other Similar Iron,
3 to chemical composition prescribed in Table 1. The product
Nickel, and Cobalt Alloys
analysis tolerances shall conform to the requirements pre-
F 981 Practice for Assessment of Compatibility of Bioma-
scribed in Table 2. Product analysis tolerances do not broaden
terials (Nonporous) for Surgical Implants with Respect to
4 the specified heat analysis, but cover variation between labo-
Effect of Materials in Muscle and Bone
ratories in the measurement of chemical content.
F 1377 Specification for Cobalt-28 Chromium-6 Molybde-
5.2 Investment castings produced from alloy conforming to
num Powder for Coating of Orthopedic Implants (UNS-R
4 this specification shall also conform to the chemical require-
30075)
ments of Table 1.
2.2 Aerospace Material Specification:
5.3 Requirements for the major and minor elemental con-
AMS 2248 Chemical Check Analysis Limits, Wrought
stituents are listed in Table 1. Also listed are important residual
Heat, and Corrosion-Resistant Steels and Alloys
elements. Analysis for elements not listed in Table 1 is not
AMS 2269 Chemical Check Limits, Wrought Nickel Alloys
required to verify compliance with this specification.
and Cobalt Alloys
5.4 For referee purposes, Test Methods E 354 shall be used.
2.3 American Society for Quality Standard:
6. Mechanical Requirements
This specification is under the jurisdiction of ASTM Committee F-4 on Medical
6.1 Tensile Properties:
and Surgical Materials and Devices and is the direct responsibility of Subcommittee
6.1.1 Materials shall conform to the mechanical property
F04.12 on Metallurgical Materials.
requirements given in Table 3 when tested in accordance with
Current edition approved Jan. 10, 1998. Published June 1998. Originally
published as F 75 – 67. Last previous edition F 75 – 92.
Test Methods E 8.
Annual Book of ASTM Standards, Vol 03.01.
Annual Book of ASTM Standards, Vol 03.05.
Annual Book of ASTM Standards, Vol 13.01.
5 6
Available from Society of Automotive Engineers, 400 Commonwealth Drive, Available from American Society for Quality, 611 East Wisconsin Ave.,
Warrendale, PA 15096. Milwaukee, WI 53203.
Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
F75
TABLE 1 Chemical Requirements TABLE 3 As-Cast Mechanical Property Requirements
Composition, % Property
Element
min max Tensile strength, min, psi (MPa) 95 000 (655)
Yield strength (0.2 % offset), min, psi (MPa) 65 000 (450)
Chromium 27.0 30.00
Elongation, min, % 8
Molybdenum 5.0 7.00
Reduction of area, min, % 8
Nickel . 1.00
Iron . 0.75
Carbon . 0.35
Silicon . 1.00
Manganese . 1.00
or more of the initial results do not conform to the requirements
Tungsten . 0.20
Phosphorous . 0.020
given in Table 3, an additional four tensile specimens shall be
Sulfur . 0.010
tested. For the material lot to be in compliance with the tensile
Nitrogen . 0.25
property requirements of this standard, all four of the addi-
Aluminum . 0.30
Boron . 0.01
tional tensile test results must conform to the requirements
Cobalt balance balance
given in Table 3.
6.1.4 Tension test results for any specimen which fractures
A
outside of the gage length shall be considered invalid and
...