Jan 26, 2015 - PDF download for Crack detection and health monitoring of highway steel-girder bridges, Article Information. ASTM Standard E122 - 09e1.
Scope 1.1 This test method covers procedures for measuring, classifying, and determining the presence of decarburization and carburization in the threaded section of hardened and tempered inch series steel bolts, screws, studs, and similar parts which have been heated to facilitate fabrication or to modify its mechanical properties. This test method is not intended to address products which are intentionally carburized to achieve specific results.
1.2 Two routine methods are described for measuring the limits of and determining the presence of decarburization or carburization-the optical method and the microindentation method 1. Either method is appropriate for routine examinations.
The microindentation method 2 shall be considered the referee method. 1.3 For the purpose of these tests, there are three classes of hardened and tempered steel products for which specific measurements must be made with respect to their physical properties. 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. Subscription Information MADCAD.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 or +1 800.798.9296. Some features of MADCAD.com ASTM Standards Subscriptions are: - Online access: With MADCAD.com’ s web based subscription service no downloads or installations are required.
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ASTM E122, Standard Practice for Calculating Sample Size to Estimate, With Specified Precision, the Average for a Characteristic of a Lot or Process, has just been revised. The new 2017 Edition updates the previous 2009 Edition (with an editorial correction), which is now obsolete. The standard covers a number of simple methods for calculating unit values for valid sampling. ASTM E122 is one of our! Sampling is a proven methodology used extensively in quality and process control.
In order to have valid results, you need to understand how many units need to be used in order to achieve a specified precision. And accuracy depends both on the units chosen and the time interval. This practice was developed so you have the tools to measure variability. It’s been a while since the ASTM E122 was revised. You’ll find corrections in a number of areas. First, the scope paragraph is expanded to include information on the system of units for the standard. Also, a disclaimer assures the user that the standard was developed in accordance with standardization principles accepted by the WTO Technical Barriers to Trade Committee.
A new definition of pooled standard deviation has been included. A number of equations have been changed. At the end of the publication, a new clause 12 for keywords has been added. If you want to have more information on these changes, you should purchase the redline edition of the document from us. With this option, we provide you with both a clean copy of the 2017 Edition plus a marked-up copy of the 2009 so you can clearly see each modification.
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