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Reg. 418, Reg. 419
TESTS FOR CLASS II FUSION WELDED SEAMS

Tensile test

The specimen shall be cut out transversely to the welded seam (see Figure 50) and shall be of the full thickness of the plate at the welded seam and the breadth W shall be as great as the testing machine will reasonably allow provided the effective cross-sectional areas is not less than 1 ½ sq. in. (see fig. 51). The ultimate tensile stress of the welded seam specimen shall be not less than the lower limit specified for the plate (see Table under Regulation 16).



Reg. 419
TESTS FOR CLASS II FUSION WELDED SEAMS

Bend Test

Two bend tests shall be made.

One specimen shall be tested with the outer surface or the weld in tension, and the other with the inner surface in tension. The specimens shall be rectangular in section and shall be cut out transversely to the weld so as to have a width of not less than one-and-a-half times the thickness of the plate. The sharp corners of the specimens shall be rounded to a radius not exceeding ten per cent of the thickness of the specimen.

Where the plate thickness does not exceed 1 ¼ inches the thickness of the specimen shall be equal to the full thickness of the test plate. Where the plate thickness exceeds 1 ¼ inches the thickness of the specimen shall be at least 1 ¼ inches. The specimen to be tested with the outer surface of the weld in tension shall be prepared by cutting to waste the metal local to the inner surface of the weld, so that the desired specimen thickness is obtained.

The specimen to be tested with the inner surface in tension shall be prepared by cutting to waste the metal local to the outer surface of the weld so that the desired metal thickness is obtained. Where the thickness of the plate permits, both specimens may be cut from the same piece of plate, the specimens being located in the plate one above the other. Each specimen shall be mounted with the weld midway between the supports, set apart at a distance of not more than 5.2 times the thickness of the specimen and pushed through the support with a former having a diameter equal to three times the thickness of the specimen( see Fig 20).

One completion of the test no crack or defect at the outer surface of the specimen shall be greater than 1/16 inch measured across the specimen or 1/8 inch measured along the length of the specimen. Premature failure at corner of the specimen shall not be considered cause for rejection ( see Fig 20, Specimen A.)

 

 
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