ISO 8492:2013 pdf free
ISO 8492:2013 pdf free.Metallic materials – Tube – Flattening test
ISO 8492 specifies a method for determining the ability of metallic tubes of circular cross-section to undergo plastic deformation by flattening. It may also be used to reveal the defects in the tubes.
ISO 8492 is applicable to tubes having an outside diameter no greater than 600 mm and a thickness no greater than 15 % of the outside diameter. The range of the outside diameter or thickness, for which ISO 8492 is applicable, may be more exactly specified in the relevant product standard.
Symbols, designations and units for the flattening test are given in Table 1 and are shown in Figure 1. Flattening the end of a tube or a test piece of specified length, cut from a tube in a direction perpendicular to the longitudinal axis of the tube, until the distance between platens measured under load in the direction of flattening reaches a value specified in the relevant product standard [see Figure 1. a) and b].
In the case of close flattening, the internal surfaces of the test piece shall be in contact over at least half of the internal width b of the flattened test piece standard [see Figure 1 c)].
The test machine is capable of flattening the test piece to the prescribed distance H between two plane, parallel, rigid platens.
The width of the platens shall exceed the width of the test piece after flattening, i.e. at least 1,6 D, and the length of the platens shall extend over the whole length of the test piece.
The length of a test piece shall be no less than 10 mm and no more than 100 mm. The edges of the test piece may be rounded by filing or chamfered by other methods.
NOTE Non-rounded or non-chamfered edges are permissible if the test result meets the test requirements.
When the test is carried out on the end of a full-length tube, the tube shall be cut at right angles to the axis of the tube to a depth of at least 80 % of the tube outside diameter. The cut shall be at a distance from the end of the tube equal to the length of the test piece.ISO 8492 pdf download.
