tailieunhanh - Standard Specification for Carbon Steel Chain

"Standard Specification for Carbon Steel Chain" covers carbon steel chain for such applications as railroad cars, construction, industrial uses, load binding, and general purposes other than overhead lifting. The Grade designation is 1⁄10 of the minimum breaking strength in newtons divided by two times the nominal crosssectional area of the chain in square millimetres. | Designation A413 A413M 07 Reapproved 2012 Standard Specification for Carbon Steel Chain1 This standard is issued under the fixed designation A413 A413M the number immediately following the designation indicates the year of original adoption or in the case of revision the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript epsilon indicates an editorial change since the last revision or reapproval. This standard has been approved for use by agencies of the Department of Defense. 1. Scope been found by testing to break when a constantly increasing This specification covers carbon steel chain for such force is applied in direct tension. applications as railroad cars construction industrial uses load Discussion This test is a manufacturer s attribute binding and general purposes other than overhead lifting. acceptance test and shall not be used as criteria for service. NOTE 1 This specification does not cover carbon steel chain for lot n for the purpose of acceptance testing a lot shall sprocket applications. consist of 3000 ft 1000 m or fraction thereof of the same Three classes of carbon steel chain are covered grade and size chain. If a continuous length of chain exceeds Grade 30 Proof coil chain. 3000 ft 1000 m it shall also be considered a lot. Grade 43 High test chain. proof test n quality control tensile test applied to Grade 70 Transport chain. chain for the purpose of verifying weld and material quality. The Grade designation is 1 10 of the minimum breaking Discussion It is the minimum force in pounds or strength in newtons divided by two times the nominal cross- newtons which the chain has withstood at the time it left the sectional area of the chain in square millimetres. producer under a test in which a constantly increasing force has been applied in direct tension to a straight length of chain. The values stated in either acceptable metric units or in