ASTM A623:16 pdf download

ASTM A623:16 pdf download.Standard Specification for Tin Mill Products, General Requirements.
9.2.4 Crown is the difference in strip thickness from the center of roll width and the locations 1 in. in from both mill-trimmed edges.
9.2.5 Feather Edge is the maximum difference in thickness across the strip width between points measured at ¼ in. and 1 in. from both mill-trimmed edges. The thickness ¼ in. from an edge is usually less than the thickness measured 1 in. or more from the same edge.
9.2.6 Burr—A maximum of 0.002 in. is permissible. Burr may be estimated by using a micrometer with a flat anvil and spindle and measuring the difference between strip thickness adjacent to the edge and strip thickness at the edge. which includes the displaced metal. Care must be taken during that measurement to avoid deforming the displaced metal.
9.2.7 camber—The maximum permissible deviation is
1/16 in. for each 48 in. of length or fraction thereof, in accordance with the latest revision of measuring methods and definitions in Test Method A987.
9.2.8 Out-of -Square is the deviation of an end edge from a straight line, which is placed at a right angle to the side of the plate, touching one corner and extending to the opposite side. The amount of deviation is customarily limited to /16 in. for any edge measurement, except that a bundle may contain a maximum of four sheets with a deviation tip to 1/8 in.
9.2.9 Shearing Practice—Tin mill products are sheared to the ordered width and to the ordered length. The greater dimension is considered length. The slit dimension shall not vary over the designated overrun by more than —0, +½ in. and the drum cut dimension shall not vary over the designated overrun by more than —0, +¼ in.
10. Special Requirements
10.1 Welds—Coils may contain lap or mash welds, the locations of which are marked. A hole may be punched adjacent to the weld for automatic rejection of the weld during shearing. The leading ends of lap welds shall not exceed 1 in.
10.2 Cores—If coil centers must be supported to minimize damage, this requirement should be so stated on the order as a special requirement.
11. Sheet Count—Cut Sizes
11.1 Small ‘dariations in sheet count/bundle should average out to at least the proper exact count in quantities of 400 packages or more.
12. Retest Procedure
12.1 In the event the material fails to meet the specified requirements, two further series of samples arc to be selected by the purchaser in accordance with the applicable procedures. Both retests must meet the specification limits to qualify as meeting the requirements.
13. Conditions of Manufacture
13.1 The purchaser should be informed of any alterations in the method of manufacture, which will significantly affect the properties of the purchased product.