National standard: GB/T2965-2007, GB/T13810, Q/BS5331-91
American Standard: ASTM B348, ASTM F136, ASTM F67, AMS4928

Material: Gr7
1. Reference standards
1: GB 228 metal tensile test method
2: GB/T 3620.1 Titanium and titanium alloy grades and chemical composition
3: GB/T3620.2 titanium and titanium alloy processed products chemical composition and allowable deviation of composition
4: GB 4698 sponge titanium, titanium and titanium alloy chemical analysis method
2. Technical requirements
1: The chemical composition of titanium and titanium alloy bars should meet the requirements of GB/T 3620.1. When repeated inspections are required, the allowable deviation of the chemical composition should meet the requirements of GB/T 3620.2.
2: The diameter or side length of the hot processed bar and its allowable deviation should meet the requirements of Table 1.
3: After hot processing, after turning (polishing) the bar and cold rolling, the allowable deviation of the diameter of the cold drawn bar shall meet the requirements of Table 2.
4: The out-of-roundness of the turned (polished) bar after hot processing should not be more than half of its dimensional tolerance.
5: The indefinite length of the processed bar is 300-6000mm, and the indefinite length of the bar in the annealed state is 300-2000mm. The fixed or multiple length should be within the range of indefinite length. The allowable deviation of the fixed length is +20mm ; The length of the double ruler shall also be included in the cut amount of the bar, and the amount of each cut is 5mm. The fixed length or the length of the double rule shall be indicated in the contract.