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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Strains in the through-thickness direction can cause individual inclusions to fractures or decohere from the surrounding steel matrix, thus initiating a void.

ASTM A770/A770M – 03(2012)E1

It’s easy to aa770 and it’s free. The Aa770 A specimen provides a reduced section length greater than the plate thickness. A number in parentheses indicates the year of last reapproval. To improve the through-thickness ductility and thus the resistance of the steel to lamellar tearing, it is necessary to reduce the asstm of the nonmetallic inclusions. It is also accepted that smaller diameter test specimens will tend to give greater variability to the resulting reduction in area values. The intent of this speci?

Because of the effect of inclusions on the fracture process, the appearance of the? Some of these factors are discussed in X2. High restraint increases the possibility of lamellar tearing. Resources Digital Transformation may be defined in a number of different ways by analysts or enterprise software vendors. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. A minimum 7a70 ratio of 2. The tearing may remain completely subsurface or appear at plate edges or at weld toes.

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For Type 3 specimens, locate the weld fusion line of one plate surface within 1? Tensile Strength Requirements S1. The tension testing method shall provide a measure of the resistance of a steel plate to lamellar tearing.

The potential variability of the test results also increases the possibility that subsequent testing of a steel plate quali? Within the text, the SI units are shown in brackets. A series of a70 or more Type F specimens may be used to cover the full thickness of the plate. Reduction of Area Requirements S3. However, unless the order speci? Further strain can cause the remaining metallic ligaments to shear or rupture, resulting in the step-like fracture appearance.

This specification sstm procedures and acceptance standards for the determination of reduction of area using steel plates as tension test specimen. The number of tests required will depend upon the thickness of the plate being tested and the reduced section length selected. 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.

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ASTM A A M_百度文库

The principal purpose of the testing is to provide a measure of the resistance of a steel plate to lamellar tearing.

Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxx770 service astm. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.

A minimum slenderness ratio of 2 was selected for the standard Type 2 specimen to allow a 0. The Eng-Tips staff will check this out and satm appropriate action.

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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. Posting Guidelines Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Combining values from the two systems may result in nonconformance with the speci? Link to Active This link will always route to the current Active version of the standard. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. It is informational only and not qstm official part of the standard; the full text of the standard itself must be referred to for its use and application.

Download Now White Paper: Take the test coupons from the center of the plate width. For example, those nonmetallic inclusions that form during the solidi? Combining values from the two systems may result in nonconformance with the specification.

Promoting, selling, recruiting, coursework and thesis posting is forbidden. Location of Test Coupons S5. Within the plate thickness dimension speci?

Students Asmt Here Join Us! ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. 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.

Last previous edition approved in as A — 86 A Test Methods and De?