美国材料协会标准 A3 - 01 (2019).pdf

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. Designation: A3 − 01 (Reapproved 2019) Standard Specification for Steel Joint Bars, Low, Medium, and High Carbon (Non-Heat- Treated)1 This standard is issued under the fixed designation A3; 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 U.S. Department of Defense. 1. Scope 3. Ordering Information 1.1 This specification covers steel joint bars for connecting 3.1 Orders for joint bars under this specification shall steel rails in mine, industrial, and standard railroad track. include the following information as appropriate: 3.1.1 Quantity—number of pairs of bars, 1.2 Three grades of joint bars are defined for applications where non-heat treated bars are suitable: 3.1.2 Type—design or type bar along with section designa- tion and weight of rails being joined, 1.2.1 Grade 1, low-carbon, primarily for industrial and mine