SAE AS 478P:2017 pdf free

SAE AS 478P:2017 pdf free.ldentification Marking Methods
ltems which require more than one identification number, such as item number, serial number, etc., shall have each number on a separate line; or consecutive identification numbers on the same line shall be separated by no less than two spaces. The separation or division of the digits of an identification number will not be objectionable provided the digits are in sequence and cannot be misread.
Permanent marking for the general categories of items shall normally be between 0.060 and 0.160 inch (1.5 and 4 mm) in height. In special cases when governed by size or configuration, 0.016 inch (0.4 mm) minimum or 0.250 inch (6.35 mm) maximum height is permissible, or as otherwise specified in this standard or on the item drawing. When integral marking is used, the height should not exceed 0.500 inch (12.7 mm) nominal character size.
Stress concentrations resulting from improper applications of marking methods may cause item distortion or failure. Marking methods, such as methods 4 or 6 in Table 1, may produce secondary effects which are detrimental to item reliability and must be properly evaluated to the item design. Items distorted or otherwise damaged by marking shall be subject to rejection.Permanent markings not in compliance with the limits given in this standard may be the basis for rejection of the items by the purchaser.
ldentification marking shall be legible and make full use of the available marking area. Characters shall be block form capital letters and Arabic numerals without serifs, such as “Gothic” or “Futura.” Lower case letters may be used when required for metric unit symbols. Other characters shall be of similar appearance. Condensed letters and smeared letters shall be cause for rejection. T emplates for the electrochemical process may be produced by a conventional typewriter provided legibility is maintained. Processes performed after marking which may reduce legibility (such as vapor or grit blasting, tumbling, etching, etc.) shall be controlled to prevent loss of legibility. Normally all characters shall be legible without magnification. However,where space or surface condition limits the size of characters that may be used, legibility with 3X magnification maximum is permissible when authorized.SAE AS 478P pdf free download.