ASTM A770 PDF

ASTM A STANDARD SPECIFICATION FOR THROUGH-THICKNESS TENSION TESTING OF STEEL PLATES FOR SPECIAL APPLICATIONS. ASTM A A M – Designation: A /AM – 03 Standard Speci? cation for Through-Thicknes. copy of ASTM A is included in Appendix A of this report. In the process of . of a rolled W-shape that is made of ASTM A Grade 50 steel.

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The principal purpose of the testing is to provide a measure of the resistance of a steel plate to lamellar tearing. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.

The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other.

It is generally accepted that there is a qstm effect on reduction-of-area values such that a smaller diameter specimen generally yields a higher average reduction in area value. It is generally caused by strain induced in the thickness direction resulting from shrinkage of the weld deposit and by the restraint imposed by the components that comprise the weldment.

The Type B specimen ast a reduced section length of 21? The intent of this speci? To improve the through-thickness ductility and thus the resistance of the steel to lamellar tearing, it is necessary to reduce the level of the nonmetallic inclusions. Current edition approved May 10, Lamellar tearing may also result from loads on the plate surface.

High restraint increases the a7700 of lamellar tearing. Digital Transformation may be xstm in a number of different ways by analysts or enterprise software vendors. Take the test coupons from the center of the plate width. ASTM does not give any warranty express or implied or make any representation that the contents of wstm abstract are accurate, complete or up to date. Location of Test Coupons S5.

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Several types of test specimen shall have specified values of plate thickness, diameter, minimum radius, and length of reduced section.

On the other hand, astk reduction in the magnitude and concentration of these inclusions to a low level tends to preclude any easy fracture path along the low ductility inclusions and the steel exhibits improved ductility in a throughthickness direction.

ASTM A770/A770M – 03(2012)E1

A superscript epsilon e indicates an editorial change since the last revision or reapproval. Reduction of Area Requirements S3.

The most widely accepted method of measuring the material ductility factor of susceptibility to lamellar tearing is the reduction of area of a round tension test specimen oriented perpendicular to the rolled surface of a plate. Because these relationships between the test specimen diameter and the average and variability of the test result have not been satisfactorily quanti? ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard.

For example, those nonmetallic inclusions that form during the solidi? This scatter of test results is due in part to the inherent variability of the distribution of the nonmetallic inclusions discussed in X1. The Eng-Tips staff will check this out and take appropriate action. For plates over 41?

To provide a high resistance to lamellar tearing may require the use of special steel-making processes that can reduce the oxygen and sulfur contents in the steel to very low levels. Click Here to join Eng-Tips and talk with other members! The length of the reduced section Aas shown in Fig.

Over a minimum plate thickness determined by the specimen end con? The Type A specimen provides a reduced section length greater than the plate thickness. However, lamellar tearing is not solely con? The principal purpose of the testing is to provide a measure of the resistance of a steel plate to lamellar tearing.

It asym informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. Defense manufacturing is all about project manufacturing and project accounting. Historical Version s – view previous versions of standard. This abstract is a brief summary of the referenced standard. Users of this standard are expressly advised that determination of asm validity of sstm such patent rights, and the risk of infringement of such rights, are entirely their own responsibility.

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Download Now Defense manufacturing is all about project manufacturing and project accounting. It’s easy to join and it’s free.

The steelmaking processes are not all intended for the same purpose, but will improve the through-thickness ductility to various degrees depending on the process used. Thank you for helping keep Eng-Tips Forums free from inappropriate posts. A number in parentheses indicates sstm year of last reapproval. For plates over 6 in.

Athough thickness tension test – ASTM (testing materials) Code Issues – Eng-Tips

For aluminum-silicon killed steels, these inclusions are primarily sul? Combining values from the two systems may result in nonconformance with the speci?

A minimum slenderness ratio of 2 was selected for the standard Type 2 specimen to allow astk 0. This standard has been approved for use by agencies of the Department of Defense.

This documents may be applied as a supplement to all product standards for flat products and sections of fully killed steel, except stainless steel. Promoting, selling, recruiting, coursework and thesis posting is forbidden.

The more common processes, used singly or in combination, are: Within the text, the SI units asfm shown in brackets.

Originally approved in The tearing may remain completely subsurface or appear at plate edges or at weld toes. Posting Guidelines Promoting, selling, recruiting, coursework and thesis posting is forbidden. Join your peers on the Internet’s largest technical engineering professional community.