FORMAT
BOOKS
PACKAGES
EDITION
PUBLISHER
CONTENT TYPE
Act
Admin Code
Announcements
Bill
Book
CADD File
CAN
CEU
Charter
Checklist
City Code
Code
Commentary
Comprehensive Plan
Conference Paper
County Code
Course
DHS Documents
Document
Errata
Executive Regulation
Federal Guideline
Firm Content
Guideline
Handbook
Interpretation
Journal
Land Use and Development
Law
Legislative Rule
Local Amendment
Local Code
Local Document
Local Regulation
Local Standards
Manual
Model Code
Model Standard
Notice
Ordinance
Other
Paperback
PASS
Periodicals
PIN
Plan
Policy
Product
Program
Provisions
Requirements
Revisions
Rules & Regulations
Standards
State Amendment
State Code
State Manual
State Plan
State Standards
Statute
Study Guide
Supplement
Technical Bulletin
All
|
Description of ASTM-B939 2009ASTM B939 - 09Standard Test Method for Radial Crushing Strength, K , of Powder Metallurgy (P/M) Bearings and Structural MaterialsActive Standard ASTM B939 | Developed by Subcommittee: B09.04 Book of Standards Volume: 02.05 ASTM B939Significance and Use The radial crushing strength test is a destructive procedure used to determine a material strength characteristic of PM bearings and hollow cylindrical test specimens. These data can be used to grade, classify, and evaluate the materials. The PM bearing Specifications B438 and B439 require the use of this test method as an acceptance test for the strength of oil-impregnated sintered bearings. This test method may be used by powder producers and parts manufacturers as a lot acceptance test for metal powders and lubricated powder mixtures intended for the production of porous parts. Companies in the PM industry use this test as a manufacturing control test because it is appropriate for production practices. Radial crushing strength is a property of the PM material but is not a design value. However, experience has shown that the radial crushing strength of a material is approximately twice the ultimate tensile strength. 1. 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 (PM) bearing or a thin-walled 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 With the exception of density values, for which the g/cm 3 unit is the industry standard, the values stated in inch-pound units are to be considered the standard. The values in SI units, shown in parenthesis have been converted in accordance with IEEE/ASTM Standard SI 10, may be approximate and are only included for information. 1.4 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.
MPIF Standard MPIFStandard55 Determination of Radial Crush Strength (K) of Powder Metallurgy (PM) Test SpecimensASTM Standards B243 Terminology of Powder Metallurgy B438 Specification for Bronze-Base Powder Metallurgy (PM) Bearings (Oil-Impregnated) B439 Specification for Iron-Base Powder Metallurgy (PM) Bearings (Oil-Impregnated) B925 Practices for Production and Preparation of Powder Metallurgy (PM) Test Specimens E456 Terminology Relating to Quality and Statistics E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method IEEE/ASTM Standard SI10 American National Standard for Use of the International System of Units (SI): The Modern Metric System Keywords K; material strength; PM bearings; radial crushing strength; Structural materials; Powder metallurgy (P/M) materials; Radial crushing; Radial crushing force; ICS Code ICS Number Code 77.160 (Powder metallurgy) DOI: 10.1520/B0939-09 ASTM International is a member of CrossRef. ASTM B939The following editions for this book are also available...This book also exists in the following packages...Subscription InformationMADCAD.com ASTM Standards subscriptions are annual and access is unlimited concurrency based (number of people that can access the subscription at any given time) from single office location. For pricing on multiple office location ASTM Standards Subscriptions, please contact us at info@madcad.com or +1 800.798.9296.
Some features of MADCAD.com ASTM Standards Subscriptions are: - Immediate Access: As soon as the transaction is completed, your ASTM Standards Subscription will be ready for access.
For any further information on MADCAD.com ASTM Standards Subscriptions, please contact us at info@madcad.com or +1 800.798.9296.
About ASTMASTM International, formerly known as the American Society for Testing and Materials (ASTM), is a globally recognized leader in the development and delivery of international voluntary consensus standards. Today, some 12,000 ASTM standards are used around the world to improve product quality, enhance safety, facilitate market access and trade, and build consumer confidence. ASTM’s leadership in international standards development is driven by the contributions of its members: more than 30,000 of the world’s top technical experts and business professionals representing 150 countries. Working in an open and transparent process and using ASTM’s advanced electronic infrastructure, ASTM members deliver the test methods, specifications, guides, and practices that support industries and governments worldwide. |
GROUPS
|