A number in parentheses indicates the year of last reapproval. This standard has been approved for use by agencies of the U. Department of Defense. Flaws, not shown by X rays, mayappear in the surface of a specimen when it is subjected toprogressive localized overstressing.
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A number in parentheses indicates the year of last reapproval. This standard has been approved for use by agencies of the U. Department of Defense.
Flaws, not shown by X rays, mayappear in the surface of a specimen when it is subjected toprogressive localized overstressing. This guided bend test hasbeen developed primarily for plates and is not intended to besubstituted for other methods of bend testing.
The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use. Referenced Documents2. Summary of Test Method4. The specimen is forced into the die by a plungerhaving the shape necessary to produce the desired contour. Theconvex surface of the bent specimen is examined for cracks orother open flaws.
Significance and Use5. Test Specimens8. The weld-face surface of the flat specimen contains the greaterwidth of the weld material, while the opposite side is called theweld-root surface. Current edition approved May 1, Published September Originallyapproved in Last previous edition approved in as E — 92 DOI: United States Thickness of Specimenin.
NOTE 2—The shoulders or rollers shall have a minimum width of 2 in. NOTE 3—The length of the specimen shall be such that the ends will not interfere with the seating of the specimen. NOTE 4—The plunger shall be fitted with an appropriate base and provisions for attachment to the testing machine; and shall be designed to minimizedeflection and misalignment. NOTE 5—The die member shall be fitted with an appropriate base designed to safeguard against deflection or misalignment and equipped with meansfor keeping the shoulders or rollers over the midpoint and aligned with respect to the plunger.
Edge may be thermally cut and may or may not be machined. Place transversespecimens on the die member of the jig with the weld atmidspan. Place face-bend specimens with the weld face di-rected toward the gap. Place root-bend specimens with thet, in. Do not thermally cut. NOTE 2—Weld reinforcement and backing strip or backing ring, if any, shall be removed flush with the surface of the specimen. The specimen shallbe machined to a thickness, T, which must be specified in relation to t.
If a recessed ring is used, this surface of the specimen may be machined to a depthnot exceeding the depth of the recess to remove the ring, except that in such cases the thickness of the finished specimen shall meet the specifiedrelationship to t. Do not flame-cut nonferrous material. NOTE 2—Weld reinforcement and backing strip, if any, shall be removed flush with the surface of the specimen.
The specimen shall be machined toa thickness, T, which must be specified in relation to t. If a recessed strip is used, this surface of the specimen may be machined to a depth not exceedingthe depth of the recess to remove the strip, except that in such cases the thickness of the finished specimen shall meet the specified relationship to t.
Place side-bend specimenswith the side showing the greater flaws toward the gap. If nosignificant flaws are evident, either side may be chosen. Interpretation of Results Precision and Bias Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.
This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend.
If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.
ASTM E190 - 14
More E No reversal of the bend force shall be employed when conducting these tests. The bend angle can be measured while the specimen is under the bending force usually when the semi-guided bend test is employed , or after removal of the force as when performing a free-bend test. Product requirements for the material being tested determine the method used. Scope 1. Included in the procedures are four conditions of constraint on the bent portion of the specimen; a guided-bend test using a mandrel or plunger of defined dimensions to force the mid-length of the specimen between two supports separated by a defined space; a semi-guided bend test in which the specimen is bent, while in contact with a mandrel, through a specified angle or to a specified inside radius r of curvature, measured while under the bending force; a free-bend test in which the ends of the specimen are brought toward each other, but in which no transverse force is applied to the bend itself and there is no contact of the concave inside surface of the bend with other material; a bend and flatten test, in which a transverse force is applied to the bend such that the legs make contact with each other over the length of the specimen.