ASTM E208-17e1 free download

09-29-2020 comment

Today,i will share ASTM E208 – 17e1 pdf.Standard Test Method for Conducting Drop-Weight Test to Determine Nil-Ductility Transition Temperature of Ferritic Steels.
This test method covers the determination of the nil-ductility transition (NDT) temperature of ferritic steels, 5/8 in. (15.9 mm) and thicker.
This test method may be used whenever the inquiry, contract, order, or specification states that the steels are subject to fracture toughness requirements as determined by the drop-weight test.
The values stated in inch-pound units are to be regarded as the standard.
A guard sereen, similar to that shown in Fig. 2(c), is recommended to stop broken specimen halves of the very brittle steels which break into two pieces with both halves being ejected forcefully from the machine.
Modifications of the equipment or assembly details of the drop-weight machine shown in Fig. 2 are permitted provided that the modified machine is functionally equivalent. Fig. 5 illustratcs a portable machine design used by an industrial concern for drop-weight tests of materials used for pressure vessel components at different fabrication sites.
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