ASTM B439-12
Standard Specification for Iron-Base Powder Metallurgy (PM) Bearings (Oil-Impregnated)

Standard No.

ASTM B439-12

Release Date

2012

Published By

American Society for Testing and Materials (ASTM)

Status

Be replaced

Replace By

ASTM B439-18

Latest

ASTM B439-21

Scope

1.1 This specification covers the requirements for porous iron-base metallic sleeve, flange, thrust, and spherical bearings that are produced from metal powders utilizing powder metallurgy (PM) technology and then impregnated with oil to supply operating lubrication.

1.2 Listed are the chemical, physical, and mechanical specifications for those standardized ferrous PM materials that have been developed specifically for the manufacture of self-lubricating bearings.

1.3 This standard is a companion to Specification B438 that covers the requirements for porous oil-imptegnated bronze-base bearings.

1.4 Typical applications for self-lubricating iron-base PM bearings are discussed in Appendix X1.

1.5 Commercial bearing dimensional tolerance data are shown in Appendix Appendix X2, while engineering information regarding installation and operating parameters of PM bearings is included in Appendix Appendix X3. Additional useful information on self-lubricating bearings can be found in MPIF Standard 35 (Bearings), ISO 5755 and the technical literature.

1.6 Units8212;With the exception of density values for which the use of the g/cm³ unit is the long-standing practice of the PM industry, the values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not to be regarded as standard

1.7 The following safety hazards caveat pertains only to the test methods described in this specification. This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

ASTM B439-12 Referenced Document

• ASTM B243 Standard Terminology of Powder Metallurgy
• ASTM B438 Standard Specification for Bronze-Base Powder Metallurgy (PM) Bearings (Oil-Impregnated)*， 2024-04-20 Update
• ASTM B939 Standard Test Method for Radial Crushing Strength, *， 2024-04-20 Update
• ASTM B962 Standard Test Methods for Density of Compacted or Sintered Powder Metallurgy (PM) Products Using Archimedes’ Principle
• ASTM B963 Standard Test Methods for Oil Content, Oil-Impregnation Efficiency, and Surface-Connected Porosity of Sintered Powder Metallurgy (PM) Products Using Archimedes’ Principle
• ASTM B966 Standard Test Method for Permeability of Powder Metallurgy (PM) Bearings Using Nitrogen Gas
• ASTM B970 Standard Test Method for Cleanliness of Powder Metallurgy (PM) Bearings and Structural Parts
• ASTM E1019 Standard Test Methods for Determination of Carbon, Sulfur, Nitrogen, and Oxygen in Steel and in Iron, Nickel, and Cobalt Alloys*， 2024-04-20 Update
• ASTM E29 Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
• ASTM E9 Standard Test Methods of Compression Testing of Metallic Materials at Room Temperature
• ISO 2795 Plain bearings — Sintered bushes — Dimensions and tolerances
• ISO 5755 Sintered metal material — Specifications

ASTM B439-12 history

• 2021 ASTM B439-21 Standard Specification for Iron-Base Powder Metallurgy (PM) Bearings (Oil-Impregnated)
• 2018 ASTM B439-18 Standard Specification for Iron-Base Powder Metallurgy (PM) Bearings (Oil-Impregnated)
• 2012 ASTM B439-12 Standard Specification for Iron-Base Powder Metallurgy (PM) Bearings (Oil-Impregnated)
• 2008 ASTM B439-08 Standard Specification for Iron-Base Powder Metallurgy (PM) Bearings (Oil-Impregnated)
• 2007 ASTM B439-07 Standard Specification for Iron-Base Powder Metallurgy (PM) Bearings (Oil Impregnated)
• 2006 ASTM B439-06 Standard Specification for Iron-Base Powder Metallurgy (PM) Bearings (Oil Impregnated)
• 2000 ASTM B439-00e1 Standard Specification for Iron-Base Sintered Bearings (Oil-Impregnated)
• 2000 ASTM B439-00 Standard Specification for Iron-Base Sintered Bearings (Oil-Impregnated)