ASTM-B939 Standard Test Method for Radial Crushing Strength, K, of Powder Metallurgy (PM) Bearings and Structural Materials

ASTM-B939 - 2021 EDITION - CURRENT
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Standard Test Method for Radial Crushing Strength, K, of Powder Metallurgy (PM) Bearings and Structural Materials
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Scope

1.1 This test method covers the equipment and laboratory procedure for the determination of the radial crushing strength of materials using either a plain powder metallurgy (P/M) bearing or a hollow cylindrical test specimen. This is a destructive test that produces quantitative results.

1.2 Limitations

1.2.1 The principle of this procedure is based on the material being tested having minimal ductility. The permanent deflection of the cylinder during the test should not exceed 10 % of the outside diameter.

1.2.2 The radial crushing strength test results should be used only as a guide if the test specimen has a wall thickness that is greater than one-third of the outside diameter. These test results should then only be used for comparison with data from the test specimens of like materials and similar dimensions.

1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.

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.

Keywords

K; material strength; P/M bearings; radial crushing strength; ICS Number Code 77.160 (Powder metallurgy)

To find similar documents by ASTM Volume:

02.05 (Metallic and Inorganic Coatings; Metal Powders and Metal Powder Products)

To find similar documents by classification:

77.160 (Powder metallurgy Including sintered metal materials and hardmetals)

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Document Number

ASTM-B0939-21

Revision Level

2021 EDITION

Status

Current

Modification Type

New

Publication Date

April 13, 2021

Document Type

Test Method

Page Count

4 pages

Committee Number

B09.04