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: After the impact, the fracture surface is examined to determine the percentage of "shear" (ductile) area versus brittle area.
: If you're unable to find a free link, consider purchasing the document directly from API or a standards distributor. Many professionals find the cost worthwhile for their work.
: Updates to the Fourth Edition (Released October 2020). Institutional Access
The Drop-Weight Tear Test (DWTT) involves dropping a specified weight from a set height onto a specimen with a cold-pressed notch.