ASTM A770 PDF

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

ASTM A770/A770M – 03(2012)E1

The tests shall be representative of the qstm in its? Red Flag This Post Please let us know here why this post is inappropriate.

Your comments will receive careful consideration at a meeting of the responsible technical asttm, which you may attend. 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.

It is generally accepted that there is a diameter effect on reduction-of-area values such that a smaller diameter specimen generally yields a higher average reduction in area value.

However, lamellar tearing is not solely con?

Yield Strength Requirements S2. A superscript epsilon e indicates an editorial change since the last revision or reapproval.

Individual reprints single asrm multiple copies of adtm standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. Some of these factors are discussed in X2. Within the plate thickness dimension speci? Shielded metal arc, friction, stud, or electron-beam welding methods have proven to be suitable. For plates over 6 in. ASTM International takes no position respecting the validity of any patent rights asserted aztm connection with any item mentioned in this standard.

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The intent of this speci? Alternative test specimen may be used in place of the standard test specimen. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date. The joining method used shall be one which results in a minimal heat-affected zone in the portion of the plate to be zstm. Current edition approved May 10, The potential variability of the test results also increases the possibility that subsequent testing of a steel plate quali?

ASTM A A M_百度文库

Posting Guidelines Promoting, selling, recruiting, coursework and thesis posting is forbidden. This standard is subject to revision at any time by the responsible technical committee and a77 be reviewed every?

Operator technique will also be a factor in increasing scatter, particularly in the measurement of the? Strains in the through-thickness direction can cause individual inclusions to fractures or decohere from the surrounding steel matrix, thus initiating a void. High restraint increases the possibility of lamellar tearing. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on A70, at the address shown below. Reduction of Area Requirements S3. To provide aztm 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.

However, A is not clear in scope. 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. Defense manufacturing a7770 all about project manufacturing and project accounting.

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. Tensile Strength Requirements S1.

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Promoting, selling, recruiting, coursework and thesis posting z770 forbidden. This scatter of test results is due in part to the inherent variability of the distribution of the nonmetallic inclusions discussed in X1.

See Test Methods and De? A series of two or more Type F specimens may be used to cover the full thickness of the plate. Aatm Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. A number in parentheses indicates the year of last reapproval.

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

Close this window and log in. For example, those nonmetallic inclusions that form during the solidi? 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.

The number of tests and test positions have not been established that would provide qstm good estimate of both the mean and the variability of through-thickness tensile reduction of values of a plate.

This minimum value may be from 1. The Type B specimen provides a reduced section length of 21? Register now while it’s still free! For Types 1 and 2 specimens, locate the center of the length of the reduced section at the approximate mid-point of the plate thickness.

The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Over a minimum plate thickness determined by the specimen z770 con? The Type A specimen provides a reduced section length greater than the plate thickness. Number of Tests S4. This standard has been approved for use by agencies of the Department of Defense.