1. The chemical composition of titanium and titanium alloy bars shall comply with the provisions of GB/T 3620.1. When the buyer re-inspects, the allowable deviation of the chemical composition shall comply with the provisions of GB/T 3620.2.
2. The diameter or side length of the hot-worked bar and its allowable deviation should meet the regulations.
3. The allowable deviation of the diameter of the cold-drawn bar should be specified after the hot-working (grinding) bar and cold-rolling.
4. The out-of-roundness of the bar that has been turned (ground) after hot processing should not be greater than half of its dimensional tolerance.
5. The indefinite length of the processed bar is 300-6000mm, and the indefinite length of the annealed bar is 300-2000mm. The fixed or double length should be within the range of the indefinite length. The allowable deviation of the fixed length is +20mm ; The length of the double ruler should also be included in the incision amount of the bar, and the amount of each incision is 5mm. The length of the fixed length or the double ruler should be indicated in the contract.
