ASTM B438/B438M-00

Standard Specification for Sintered Bronze Bearings (Oil-Impregnated)

STANDARD published on 10.11.2000

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The information about the standard:

Designation standards: ASTM B438/B438M-00
Note: WITHDRAWN
Publication date standards: 10.11.2000
SKU: NS-6690
The number of pages: 6
Approximate weight : 18 g (0.04 lbs)
Country: American technical standard
Category: Technical standards ASTM

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Annotation of standard text ASTM B438/B438M-00 :

Keywords:

density, K strength constant, oil content, oil-impregnated bearings, porosity, ICS Number Code 21.100.01 (Bearings in general)

Additional information

1. Scope

1.1 This specification covers sintered bronze, oil-impregnated bearings made primarily from elemental copper, tin, and graphite powders. The manufacturer may, at his discretion, use prealloyed bronze powder in the blend.

1.2 This specification covers the following variables:

1.2.1 Grades--Available in three bronze base composition grades identifiable by different graphite contents.

1.2.2 Type--Grades 1 and 2 are available in four types described by specific density ranges.

1.3 Bearings ordered to this specification will normally be sized after sintering and will be impregnated with a lubricating oil unless otherwise specified by print.

1.4 The values stated in either inch-pound or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the specification.

2. Referenced Documents

MPIF Standard 35	Materials Standards for P/M Self-Lubricating Bearings
B328-96	Standard Test Method for Density, Oil Content, and Interconnected Porosity of Sintered Metal Structural Parts and Oil-Impregnated Bearings
E9-19(2025)e1	Standard Test Methods of Compression Testing of Metallic Materials at Room Temperature (Includes all amendments and changes 4/29/2025).
FED-STD-151	Metals Test Method
B939-21(2025)	Standard Test Method for Radial Crushing Strength, K, of Powder Metallurgy (PM) Bearings and Structural Materials

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