AWS B4.0M pdf free download

AWS B4.0M pdf free download.Standard Methods for Mechanical Testing of Welds.
6. Apparatus
6.1 Guided bend specimens may be tested in either of two types of’ fixture. One type is the guided bend fixture, which is designed to support and load the specimen in a three point bending mode. The alternate is a wraparound bend fixture that fixes one end of the specimen and uses a roller to force the specimen to bend around a mandrel.
6.2 The guided bend fixture shall have the dimensions given in Figures Al or A2.
6.3 The wraparound bend fixture shall have the dimensions given in Figure A3.
6.4 The radii of the plunger shown in Figures A 1 and A2 or the mandrel shown in Figure A3 shall be specified or determined from the relationship expressed by Figure A4 between minimum required elongation and the thickness of the specimen. When specimens wider than 38 mm are to be bent, the mandrel shall be at least 6 mm wider than the specimen width.
7. Specimens
Bend test specimens shall be prepared by cutting the weld and the base metal to form a specimen rectangular in cross section. The surfaces cut transverse to the weld shall be designated as the sides of the specimen; the other two surfaces shall he designated as the face and root surfaces as appropriate. Transverse specimens may have the side, face or root of the weld as the tension surface. Longitudinal specimens may have the face or the root of the weld as the tension surface of the specimen.
7.1 Transverse Side Bend. The longitudinal axis of the specimen is perpendicular to the weld, and the specimen is bent so that one of the side surfaces becomes the tension surface of the specimen. The side showing the more significant discontinuities (if any) shall be the tension side. Transverse side bend test specimens shall conform to Figure A5. Transverse side bend specimens are used for plates or pipe that are too thick for face bend or root bend specimens and are recommended for welds with narrow fusion zones.
7.2 Transverse Face Bend. The longitudinal axis of the specimen is perpendicular to the weld and the specimen is bent so that the weld face becomes the tension surface of the specimen. Transverse face bend specimens shall conform to the requirements of Figure A6 for plate and Figure A7 for pipe welds. 7.3 Transverse Root Bend. The longitudinal axis of the specimen is perpendicular to the weld and the specimen is bent so that the root surface of the weld becomes the tension surface of the specimen. Transverse root bend specimens shall conform to the requirements of Figure A6 for plate and Figure A7 for pipe welds. 7.4 Longitudinal Face Bend. The longitudinal axis of the specimen is parallel to the weld and the specimen is bent so that the face of the weld becomes the tension sur- face of the specimen. Longitudinal face bend specimens shall conform to the requirements of Figure A8. 7.5 Longitudinal Root Bend. The longitudinal axis of the specimen is parallel to the weld and the specimen is bent so that the root of the weld becomes the tension sur- face of the specimen. Longitudinal root bend test speci- mens shall comply with the requirements of Figure A8.AWS B4.0M pdf download.