ASTM B439-00

Standard Specification for Iron-Base Sintered Bearings (Oil-Impregnated)

SCOPE
1.1 This specification covers sintered metal powder, oil-impregnated, bearings of four iron-base compositional grades:
Grades 1 and 2--iron-carbon
Grades 3 and 4--iron-copper  
1.2 The values stated in inch-pound units are to be regarded as the standard. The metric equivalents of inch-pound units may be approximate.

General Information

• Status: Historical
• Publication Date: 09-Oct-2000
• Technical Committee: B09 - Metal Powders and Metal Powder Products
• Drafting Committee: B09.04 - Bearings

Relations

• Replaced By: ASTM B439-00e1 - Standard Specification for Iron-Base Sintered Bearings (Oil-Impregnated)
• Effective Date: 10-Oct-2000
• Referred By: ASTM B939-21 - Standard Test Method for Radial Crushing Strength, <emph type="bdit">K</emph>, of Powder Metallurgy (PM) Bearings and Structural Materials
• Effective Date: 10-Oct-2000
• Referred By: ASTM B438-21 - Standard Specification for Bronze-Base Powder Metallurgy (PM) Bearings (Oil-Impregnated)
• Effective Date: 10-Oct-2000
• Referred By: ASTM B925-15(2022) - Standard Practices for Production and Preparation of Powder Metallurgy (PM) Test Specimens
• Effective Date: 10-Oct-2000

Standards Content (Sample)

NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: B 439 – 00
Standard Specification for
Iron-Base Sintered Bearings (Oil-Impregnated)
This standard is issued under the fixed designation B 439; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope 6. Physical Properties
1.1 This specification covers sintered metal powder, oil- 6.1 Density—The density of bearings supplied fully impreg-
impregnated, bearings of four iron-base compositional grades: nated with lubricant shall be within the limits prescribed in
Grades 1 and 2—iron-carbon Table 2.
Grades 3 and 4—iron-copper 6.2 Oil Content—Oil content of bearings shall not be less
1.2 The values stated in inch-pound units are to be regarded than that shown in Table 2.
as the standard. The metric equivalents of inch-pound units 6.3 Radial Crushing Strength—Radial crushing strength
may be approximate. shall not be less than the value calculated as follows:
P 5 KLT /~D – T! (1)
2. Referenced Documents
2.1 ASTM Standards:
where:
B 328 Test Method for Density, Oil Content, and Intercon-
P = radial crushing strength, lbf (or N);
nected Porosity of Sintered Powder Metal Structural Parts D = outside diameter of bearing, in. (or mm);
T = wall thickness of bearing, in. (or mm);
and Oil-Impregnated Bearings
K = strength constant as shown in Table 3 for grade
E 9 Test Methods of Compression Testing of Metallic Ma-
specified, psi (MPa); and
terials at Room Temperature
L = length of bearing, in. (or mm).
3. Ordering Information
3.1 Orders for material under this specification shall include
7. Workmanship, Finish, and Appearance
the following information:
7.1 Bearings shall be uniform in composition. When cut or
3.1.1 Grade (Section 5),
fractured, the exposed surface shall be of uniform appearance.
3.1.2 Density (6.1),
The parts shall be free from defects which would affect their
3.1.3 Dimensions, and
serviceability.
3.1.4 Certification (12.1).
8. Sampling
4. Manufacture
8.1 Lot—Unless otherwise specified, a lot shall consist of
4.1 Bearings shall be made by briquetting and sintering
parts of the same form and dimensions made from powders of
metal powders, with or without sizing, so as to produce
the same composition, formed and sintered under the same
finished parts conforming to the requirements of this specifi-
conditions, and submitted for inspection at one time.
cation.
8.2 Sample for Chemical Analysis—At least one sample for
5. Chemical Requirements
chemical analysis shall be taken from each lot. A representative
sample of chips may be obtained by milling, drilling, or
5.1 The material shall conform to the requirements as to the
crushing at least two pieces with clean dry tools without
chemical composition prescribed in Table 1.
lubrication. To obtain oil-free chips, the parts selected for test
shall have the oil extracted in accordance with Test Method
B 328, if necessary.
8.3 Mechanical Tests—The manufacturer and purchaser
This specification is under the jurisdiction of ASTM Committee B-9 on Metal
shall agree on a representative number of specimens for
Powders and Metal Powder Productsand is the direct responsibility of Subcommit-
mechanical tests.
tee B09.04on Bearings.
Current edition approved October 10, 2000. Published December 2000. Origi-
9. Test Methods
nally published as B 439–66 T to replace portions of B 202. Last previous edition
B 439–95 (2000).
9.1 Density and Oil Content—Density and oil content shall
Annual Book of ASTM Standards, Vol 02.05.
3 be determined in accordance with Test Method B 328.
Annual Book of ASTM Standards, Vol 03.01.
Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
B 439
TABLE 1 Chemical Requirements
Composition, %
Element
Grade 1 Grade 2 Grade 3 Grade 4
Copper 0–1.5 0–1.5 9.0–11.0 18.0–22.0
Iron balance balance balance balance
Total other elements by difference, max 2.0 2.0 2.0 2.0
A
Combined carbon (on basis of iron only) 0.3 max 0.3–0.6 0.3 max 0.3 max
A
The combined carbon may be a metalographic estimate of the carbon in the iron.
TABLE 2 Density and Oil Content Requirements
10. Inspection
Density, g/cm Oil Content,
Grade
10.1 Unless otherwise specified, inspection of parts sup-
min max Volume, % min
1 and 2 5.6 6.0 21 plied on contract shall be made by the purchaser at the
3 and 4 5.8 6.2 19
destination.
11. Rejection
TABLE 3 Strength Constants
K (Strength Constant), 11.1 Rejection based on tests made in accordance with this
Grade
psi (MPa)
specification shall be reported to the manufacturer within 30
1 15 000 (105)
days of receipt of shipment; however, the rejected parts should
2 20 000 (140)
not be returned without authority from the producer.
3 30 000 (205)
4 30 000 (205)
12. Certification
12.1 A certification based on the manufacturer’s quality
control that the material conforms to the requirements of this
9.2 Radial Crushing Strength—Radial crushing strength
shall be determined by compressing the test specimens be- specification, shall be the basis of shipment of the material. A
tween two flat surfaces at a “no-load” speed no greater than 0.2 certificate covering the conformance of the material to these
in./min (5.0 mm/min), the direction of the load being normal to
specifications shall be furnished by the manufacturer upon
the longitudinal axis of the specimen. The point at which the
request of the purchaser.
load drops as a result of the first crack shall be considered the
crushing strength. This test shall be applied to plain cylindrical
13. Keywords
bearings. Flanged bearings shall be tested by cutting off the
13.1 density; iron-base bearings; K strength constant; oil
flange and compressing the two sections separately. Each
content; oil impregnated; porosity
section shall meet the maximum strength requirements pre-
scribed in 6.3.
APPENDIX
(Nonmandatory Information)
X1. EXPLANATORY INFORMATION
X1.1 Design Information are given in Table X1.1.
X1.1.1 In calculating permissible loads, the operating con-
X1.3 Dimensional Tolerances
ditions, housing conditions, and construction should be con-
sidered. In general, this material has less resistance to seizure
X1.3.1 Commercial dimensional tolerances are given in
and corrosion than copper-base material. The maximum static
Table X1.2.
bearing load should not exceed 15 000 psi (105 MPa) of
projected bearing area (length times inside diameter of bearing)
X1.4 Press Fits
for this material. This figure is 75 % of the value for the
X1.4.1 Plain cylindrical journal bearings are commonly
compression de
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