本规范涵盖直径为4.000英寸（101.60 mm）的棒材、线材、闪光焊环（包括直径或平行边之间的最小距离）形式的钛合金，以及任何尺寸闪光焊环或封头的库存。

This specification covers a titanium alloy in the form of bars, wire, flash welded rings up through 4.000 inches (101.60 mm), inclusive in diameter or least distance between parallel sides, and stock for flash welded rings or heading of any size.