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 Type A specimen provides a reduced section length greater than the plate thickness. See Test Methods and De? 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. Students Click Here Join Us!
By joining you are opting in to receive e-mail. The tearing may remain completely subsurface or appear at plate edges or at weld toes. A series of two or more Type F specimens may be used to cover the full thickness of the plate. The number of tests required will depend upon the thickness of the plate being tested and the reduced section length selected. Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
Strains in the through-thickness direction can cause individual inclusions to fractures or decohere from the surrounding steel matrix, thus initiating a void. 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 more common processes, used singly or in combination, are: 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.
Further strain can cause the remaining metallic ligaments to shear or rupture, resulting in the step-like fracture appearance. In silicon semikilled or fully killed steels, these inclusions are primarily oxides present as silicates and sul? Defense manufacturing is all about project manufacturing and project accounting.
Your comments will receive careful consideration a770 a meeting of the responsible technical committee, which you may attend. The principal purpose of the testing is to provide a measure of the resistance of a steel plate to lamellar tearing.
It is 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. Link to Active This link will always route to the current Active version of the standard.
Take the test coupons from the center of the plate width. A superscript epsilon e indicates an editorial change since the last revision or reapproval. Combining values from the two systems may result in nonconformance with the speci?
On the other hand, a 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. Promoting, selling, recruiting, coursework and thesis posting is forbidden.
Yield Strength Requirements S2. This standard has been approved for use by agencies of the Department of Defense.
Athough thickness tension test – ASTM (testing materials) Code Issues – Eng-Tips
Because of the effect of inclusions on the fracture process, the appearance of the? The values stated in each system are not exact equivalents; therefore, each system must be used axtm of the other. Combining values from the two systems may result in nonconformance with the specification. Within the text, the SI units are shown in brackets.
ASTM A770/A770M – 03(2012)E1
Two tests shall be required from each quenchedand-tempered plate. Astj this minimum value, the reduction at the failure point in the reduced section is restrained by the larger cross section away from the reduced section. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. In all cases, the minimum length of the reduced section must be as speci?
The tension testing method shall provide a measure of the resistance of a steel plate to lamellar tearing. Within the plate thickness dimension speci? It is also accepted that smaller diameter test specimens will tend to give greater variability to the resulting reduction in area values.
The Eng-Tips staff will check this out and take appropriate action. Close this window and log in. The Type B specimen provides a reduced section length of 21?